SE2351091A1 - Visualized test method which is for single fracture grouting seepage and in which width and roughness are variable - Google Patents
Visualized test method which is for single fracture grouting seepage and in which width and roughness are variableInfo
- Publication number
- SE2351091A1 SE2351091A1 SE2351091A SE2351091A SE2351091A1 SE 2351091 A1 SE2351091 A1 SE 2351091A1 SE 2351091 A SE2351091 A SE 2351091A SE 2351091 A SE2351091 A SE 2351091A SE 2351091 A1 SE2351091 A1 SE 2351091A1
- Authority
- SE
- Sweden
- Prior art keywords
- grout
- fracture
- tank
- seepage
- cuboid
- Prior art date
Links
- 238000010998 test method Methods 0.000 title claims abstract description 13
- 239000011440 grout Substances 0.000 claims abstract description 202
- 238000002347 injection Methods 0.000 claims abstract description 141
- 239000007924 injection Substances 0.000 claims abstract description 141
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 238000012360 testing method Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 30
- 238000013508 migration Methods 0.000 claims abstract description 20
- 230000005012 migration Effects 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 61
- 229910000831 Steel Inorganic materials 0.000 claims description 45
- 239000010959 steel Substances 0.000 claims description 45
- 239000013505 freshwater Substances 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 21
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 238000005070 sampling Methods 0.000 claims description 15
- 238000013019 agitation Methods 0.000 claims description 13
- 239000000956 alloy Substances 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 7
- 230000002146 bilateral effect Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 11
- 230000007246 mechanism Effects 0.000 abstract description 3
- 206010017076 Fracture Diseases 0.000 description 89
- 208000010392 Bone Fractures Diseases 0.000 description 86
- 238000010586 diagram Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Dispersion Chemistry (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A visualized test method which is for single fracture grouting seepage and in which width and roughness are variable comprises the following steps: (1) designing a visualized test system for simulating a plurality of types of single fracture grouting seepage, which comprises a water injection device, a constant-pressure gas injection device, a grout tank, a visualized single fracture seepage device, a rotary bearing device and a computer; (2) adding a grout which is configured according to requirements into the grout tank; (3) constructing the visualized single fracture seepage device on the rotary bearing device according to requirements of test; (4) adjusting an inclination angle of the visualized single fracture seepage device; (5) injecting the grout into the visualized single fracture seepage device to observe and study the migration process of the grout; (6) cleaning the whole system after the test is completed. The entire process of fracture filling by means of grouting can be observed more intuitively by authentically and accurately simulating the migration and evolution process of the grout in rock strata fracture, thereby providing a platform for the study of the mechanism of rock strata fracture sealing by means of grouting.
Description
VISUALIZED TEST METHOD WHICH IS FOR SINGLE FRACTURE GROUTING SEEPAGE AND IN WHICH WIDTH AND ROUGHNESS ARE VARIABLE Field of the Invention The present invention relates to the technical field of engineering fluid mechanics test, and in particular to a visualized test method Which is for single fracture grouting seepage and in Which Width and roughness are Variable.
Background Information In the mineral engineering, especially in the coal mining, under the mining stress of the coal seam, even under the superimposed stress of multi-seam mining, the complex dynamic disaster problem such as mine pressure, gas and Water inrush is often occurred. Grouting has the effects of filling, strengthening and penneability-reducing. Through the high-pressure grouting of the fractured rock mass in the overlying strata of the coal seam, the fractures and pores in the strata are performed the grouting filling, a relatively strong "key layer" can be formed, on the one hand, the hannful gas, the Water floW and the like from the above strata can be blocked, on the other hand, the rock strata fracture can be filled from the microscopic aspect, so as to improve the strength and stability of the strata, reduce the Working resistance of the beloW support, and realize the long-tenn stability of the roadWay.
HoWever, in the current construction, the development state of rock strata fracture, the choice of grouting raW materials and the proportion of grout Will greatly affect the grouting effect in the actual engineering, and the inadvertent of grouting Will aggravate the rock strata fracture development, Which may cause the mine collapse, the existing technology is difficult to realize the Whole process simulation of grouting in the rock strata fracture, and cannot fully explore the migration and evolution laW of grout in the fracture, the obtained data lacks scientific nature and accuracy.
SUMMARY The present invention provides a visualized test method Which is for single fracture grouting seepage and in Which Width and roughness are variable, Which can truly and accurately simulate the migration and evolution process of the grout in the rock strata fracture, the test result is closer to the actual engineering than the numerical simulation, and people can also more intuitively observe the Whole process of grouting and filling of the fracture, thereby providing a platform for the study of the mechanism of rock strata fracture sealing by means of grouting.
In order to achieve the above-mentioned object, the present application provides the following technical solutions: a visualized test method Which is for single fracture grouting seepage and in Which Width and roughness are variable specifically comprises the following steps: step (1) designing a visualized test system for simulating a plurality of types of single fracture grouting seepage, this visualized test system for simulating a plurality of types of single fracture grouting seepage comprises a Water injection device, a constant-pressure gas injection device, a grout tank, a visualized single fracture seepage device, a rotary bearing device and a computer, a Water injection port and a gas injection port are provided in a top of the grout tank, an upper side portion of an outer side Wall of the grout tank is provided With a grout f1lling inlet With a sealing cap, a grout outlet is provided in a bottom portion of the grout tank, a Water outlet of the Water injection device is connected to the Water injection port of the grout tank through a Water injection pipe, a gas outlet of the constant-pressure gas injection device is connected to the gas injection port of the grout tank through a gas injection pipe, an agitation device is provided inside the grout tank, and the visualized single fracture seepage device is installed on the rotary bearing device, the grout outlet of the grout tank is connected to a grout injection port of the visualized single fracture seepage device through a grout injection pipe, on Which a grout injection valve, a grout floW meter and a grout injection pressure meter are sequentially installed along floW direction, the computer is respectively signal-connected to the visualized single fracture seepage device, the grout floW meter and the grout injection pressure meter; step (2) adding a grout whißli is configured according to requirements into the grout tank, and stirring evenly through the agitation device; step (3) constructing the visualized single fracture seepage device on the rotary bearing device according to requirements of test; step (4) adjusting an inclination angle of the visualized single fracture seepage device through the rotary bearing device; step (5) injecting a gas into the grout tank through the constant-pressure gas injection device, injecting the grout Which is inside the grout tank into the visualized single fracture seepage device to observe and study a migration process of the grout; step (6) after the test is completed, cleaning a Whole system through the Water injection device and the constant-pressure gas injection device for next test, the Water injection device comprises a Water tank, a Water injection pump, a liquid floW meter and a liquid pressure re gulating valve, the Water outlet of the Water tank is connected to a Water inlet of the Water injection pump through a Water pumping pipe, the Water outlet of the Water injection pump is connected to the Water injection port of the grout tank through the Water injection pipe, the liquid floW meter and the liquid pressure regulating valve are sequentially provided on the Water injection pipe along liquid floW direction, and the computer is respectively signal-connected to the liquid floW meter and the liquid pressure regulating valve, the constant-pressure gas injection device comprises an air pump, a voltage regulator, a gas floW meter, and a gas pressure regulating valve, the gas outlet of the air pump is connected to the gas injection port of the grout tank through the gas injection pipe, the voltage regulator, the gas floW meter and the gas pressure regulating valve are sequentially provided on the gas injection pipe along gas floW direction, the computer is respectively signal-connected to the gas floW meter and the gas pressure regulating valve, the visualized single fracture seepage device comprises an acrylic cuboid block and several pieces of acrylic long plate, the acrylic cuboid block is provided horizontally along left-right direction, and a middle portion of the acrylic cuboid block is provided With a cuboid fracture passage along the left-right direction, the cuboid fracture passage are transparent in left and right sides, and both of front side portion and rear side portion of left end of upper and loWer surface inside the cuboid fracture passage and the front side portion and rear side portion of right end of the upper and loWer surface inside the cuboid fracture passage are integrally-fonned and provided With several card strips With interval in front-rear direction, each card strip in the front side is in one-to-one correspondence With each card strip on the rear side in the front-rear direction respectively, a slot is formed betWeen tWo adj acent card strips for inserting the acrylic long plate, and height of the acrylic long plate is the same as that of the cuboid fracture passage, each piece of the acrylic long plate is vertically inserted into the each corresponding slot Which is bilateral symmetry in the cuboid fracture passage along the left-right direction respectively, the middle portion of loWer surface of the acrylic cuboid block is provided With several first through-holes provided With interval in the left-right direction, the first through-holes are in communication With the cuboid fracture passage, and each first through-hole is installed With a screW interface, a left-most screW interface is connected With a grout discharge valve, While a right-most screW interface is connected to the grout outlet of the grout tank through the grout injection pipe, each screW interface in the middle is connected With a sampling valve or a pressure sensor, the computer is respectively signal-connected to each pressure sensor, the rotary bearing device comprises a rectangle steel frame, a bearing table and a rotary tray, the rectangle steel frame is provided horizontally, the rectangle steel frame is Welded by four square steel pipes end to end, the bottom portion of the rectangle steel frame is fixed and supported on the ground by a column, the bearing table Which is a steel plate is provided horizontally in the rectangle steel frame, the middle portion of front side and the middle portion of rear side of the bearing table are connected With a rotary shaft provided horizontally along the front-rear direction, the front side of the rotary shaft is rotatably connected to a front side steel pipe of the rectangle steel frame, the rear side of the rotary shaft is rotatably connected to a rear side steel pipe of the rectangle steel frame, and the front side steel pipe of the rectangle steel frame is passed through by a front end of the front side of the rotary shaft, the rotary tray is provided vertically along the left-right direction, a center of rear side surface of the rotary tray is fixed at the front end of the front side of the rotary shaft, a front side surface of the rotary tray is engraved With an angle scale line, the rotary tray is provided With several angle positioning holes Which are provided in a circular pattern, a central angle betWeen tWo adjacent angle positioning holes is the same as a unit angle of the angle scale line, the front side steel pipe of the rectangle steel frame is provided With tWo pin holes Which are transparent in the front-rear direction and provided With interval in the left-right direction, the pin hole in left is corresponded to the positioning hole in the left, and the pin hole in right is corresponded to the positioning hole in the right, alignment pins are inserted into the positioning holes on left side and right side, and tWo alignment pins are inserted into the tWo pin holes correspondingly, the middle portion of the bearing table is recessed downward and integrally-formed, Which is provided with a cuboid groove that is the same as the shape of the acrylic cuboid block, and the acrylic cuboid block is embedded in the cuboid groove, the middle portion of groove bottom of the cuboid groove is provided with several second through-holes which is in one-to-one correspondence with each first through-hole from top to bottom, and each second through-hole is passed down through by each screw interface correspondingly, in the step (3), specifically, a corresponding number of the acrylic long plate are selected according to the requirements of test for fracture width, and based on the requirements of test of fracture roughness, several pieces of alloy sheets with interval in the left-right direction are attached to one side surface of the corresponding acrylic long plate to form equidistant protuberance, which is used to simulate rough fracture, the alloy sheet with different thickness can simulate the fracture with different roughness, then, the selected acrylic long plate is inserted into the each corresponding slot Which is bilateral symmetry in the cuboid fracture passage along the left-right direction in a sequential order from the front side and rear side to the middle of cuboid fracture passage, so as to form the fracture required for the test, wherein, the side surface of the acrylic long plate attached with alloy sheet is served as the side surface of the fracture, then the left end and right end of the acrylic cuboid block are wrapped by rubber membrane to block the left end and right end of the cuboid fracture passage, and then the acrylic cuboid block is assembled into the cuboid groove in the middle portion of the bearing table, so that each second through-hole is passed down through by each screw interface, which is in one-to-one correspondence with each second through-hole, then the left-most screw interface is connected to the grout discharge valve, while the right-most screw interface is connected to the grout outlet of the grout tank through the grout injection pipe, each screw interface in the middle is connected to the sampling valve or the pressure sensor, depending on the requirements of test.
Advantageous effects: (1) Through the present invention, it is possible to realize the visual detection of the whole process of dynamic migration of the grout for the fracture grouting process under the conditions of different widths and roughness, so as to explore and analyze the grout migration and evolution law in the fractures under different working conditions, and to obtain a large number of grouting seepage simulation test data; (2). It can be used to study the coagulation and deposition law of grout With different materials and different proportions in the floW process, Which can provide effective and reliable parameters for numerical simulation of such engineering problems. (3). This test has the advantages of low cost, short period, simple operation and small Workload, Which can save a lot of manpoWer and material resources. Through the present invention, the migration and evolution process of grout in the rock strata fracture can be accurately simulated, the test result is closer to the actual engineering than the numerical simulation, and people can also more intuitively observe the Whole process of grouting and filling of the fracture, thereby providing a platform for the study of the mechanism of rock strata fracture sealing by means of grouting.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. l is a principle schematic diagram of the visualized test system for simulating a plurality of types of single fracture grouting seepage of the present invention.
Fig. 2 is a shaft side schematic diagram of the visualized single fracture seepage device of the present invention.
Fig. 3 is a bottom vieW schematic diagram of the visualized single fracture seepage device of the present invention.
Fig. 4 is a left vieW of the visualized single fracture seepage device of the present invention.
Fig. 5 is a structure schematic diagram of the acrylic long plate Which is not bonded With the alloy sheet of the present invention.
Fig. 6 is a structure schematic diagram of the acrylic long plate Which is bonded With the alloy sheet of the present invention.
Fig. 7 is a front vieW of the rotary bearing device of the present invention.
Fig. 8 is a top vieW of the assembly of the rotary bearing device and the acrylic cuboid block of the present invention.
Fig. 9 is a cross-sectional vieW of the A-A direction in Fig. 8.
DETAILED DESCRIPTION OF EMBODIMENTS As shown in Figs. 1-9, a visualized test method Which is for single fracture grouting seepage and in Which Width and roughness are Variable specifically comprises the following steps: step (1) designing a visualized test system for simulating a plurality of types of single fracture grouting seepage, this visualized test system for simulating a plurality of types of single fracture grouting seepage comprises a Water injection device, a constant-pressure gas injection device, a grout tank 1, a visualized single fracture seepage device 37, a rotary bearing device and a computer 2, a Water injection port 3 and a gas injection port 4 are provided in the top of the grout tank 1, an upper side portion of an outer side Wall of the grout tank 1 is provided With a grout f1lling inlet 5 With a sealing cap, a grout outlet 6 is provided in the bottom portion of the grout tank 1, a Water outlet of the Water injection device is connected to the Water injection port 3 of the grout tank 1 through a Water injection pipe 7, a gas outlet of the constant-pressure gas injection device is connected to a gas injection port 4 of the grout tank 1 through a gas injection pipe 8, an agitation device 9 is provided inside the grout tank 1, and the visualized single fracture seepage device 37 is installed on the rotary bearing device, the grout outlet 6 of the grout tank 1 is connected to a grout injection port of the visualized single fracture seepage device 37 through a grout injection pipe 10, on Which a grout injection valve 11, a grout floW meter 12 and a grout injection pressure meter 13 are sequentially installed along floW direction, the computer 2 is respectively signal-connected to the visualized single fracture seepage device 37, the grout floW meter 12 and the grout injection pressure meter 13; step (2) adding a grout wvïiàcb is ctr-nfigiireci according to requirements into the grout tank 1, and stirring evenly through the agitation device 9; step (3) constructing the visualized single fracture seepage device 37 on the rotary bearing device according to requirements of test; step (4) adjusting an inclination angle of the visualized single fracture seepage device 37 through the rotary bearing device; step (5) injecting a gas into the grout tank 1 through the constant-pressure gas injection device, inj ecting the grout Which is inside the grout tank 1 into the visualized single fracture seepage device 37 to observe and study a migration process of the grout; step (6) after the test is completed, cleaning a Whole system through the Water injection device and the constant-pressure gas injection device for next test.
The Water injection device comprises a Water tank 14, a Water injection pump 15, a liquid floW meter 16 and a liquid pressure regulating valve 17, the Water outlet of the Water tank 14 is connected to a Water inlet of the Water injection pump 15 through a Water pumping pipe 18, the Water outlet of the Water injection pump 15 is connected to the Water injection port 3 of the grout tank 1 through the Water injection pipe 7, the liquid floW meter 16 and the liquid pressure regulating valve 17 are sequentially provided on the Water injection pipe 7 along the liquid floW direction, and the computer 2 is respectively signal-connected to the liquid floW meter 16 and the liquid pressure regulating valve 17.
The constant-pressure gas injection device comprises an air pump 19, a voltage regulator 20, a gas floW meter 21, and a gas pressure regulating valve 22, the gas outlet of the air pump 19 is connected to the gas injection port 4 of the grout tank 1 through the gas injection pipe 8, the voltage regulator 20, the gas floW meter 21 and the gas pressure regulating valve 22 are sequentially provided on the gas injection pipe 8 along the gas floW direction, the computer 2 is respectively signal-connected to the gas floW meter 21 and the gas pressure regulating valve 22.
The visualized single fracture seepage device 37 comprises an acrylic cuboid block 23 and several pieces of the acrylic long plate 24, the acrylic cuboid block 23 is provided horizontally along left- right direction, and a middle portion of the acrylic cuboid block 23 is provided With a cuboid fracture passage 25 along the left-right direction, the cuboid fracture passage 25 are transparent in left and right sides, and both of front side portion and rear side portion of the left end of upper and loWer surface inside the cuboid fracture passage 25 and the front side portion and rear side portion of right end of the upper and loWer surface inside the cuboid fracture passage 25 are integrally-formed and provided With several card strips 26 With interval in front-rear direction, each card strip 26 in the front side is in one-to-one correspondence With each card strip 26 on the rear side in the front-rear direction respectively, a slot is formed betWeen tWo adj acent card strips 26 for inserting the acrylic long plate 24, and the height of the acrylic long plate 24 is the same as that of the cuboid fracture passage 25, each piece of the acrylic long plate 24 is vertically inserted into the each corresponding slot Which is bilateral symmetry in the cuboid fracture passage 25 along the left-right direction respectively, the middle portion of lower surface of the acrylic cuboid block 23 is provided With seVeral first through-holes 27 proVided With interval in the left-right direction, the first through- holes 27 are in communication With the cuboid fracture passage 25, and each first through-hole 27 is installed With a screW interface, a left-most screW interface is connected With a grout discharge Valve, While a right-most screW interface is connected to the grout outlet 6 of the grout tank 1 through the grout injection pipe 10, each screW interface in the middle is connected With a sampling Valve or a pressure sensor, the computer 2 is respectively signal-connected to each pressure sensor.
The rotary bearing deVice comprises a rectangle steel frame 28, a bearing table 29 and a rotary tray 30, the rectangle steel frame 28 is proVided horizontally, the rectangle steel frame 28 is Welded by four square steel pipes end to end, the bottom portion of the rectangle steel frame 28 is fixed and supported on the ground by a column 31, the bearing table 29 Which is a steel plate is proVided horizontally in the rectangle steel frame 28, the middle portion of front side and the middle portion of rear side of the bearing table 29 are connected With a rotary shaft 32 proVided horizontally along the front-rear direction, the front side of the rotary shaft 32 is rotatably connected to a front side steel pipe of the rectangle steel frame 28, the rear side of the rotary shaft 32 is rotatably connected to a rear side steel pipe of the rectangle steel frame 28, and the front side steel pipe of the rectangle steel frame 28 is passed through by a front end of the front side of the rotary shaft 32, the rotary tray 30 is proVided Vertically along the left-right direction, a center of rear side surface of the rotary tray 30 is fixed at the front end of the front side of the rotary shaft 32, a front side surface of the rotary tray 30 is engraVed With an angle scale line 33, the rotary tray 30 is proVided With seVeral angle positioning holes 34 Which are proVided in a circular pattern, a central angle betWeen tWo adjacent angle positioning holes 34 is the same as a unit angle of the angle scale line 33, the front side steel pipe of the rectangle steel frame 28 is proVided With tWo pin holes Which are transparent in the front-rear direction and proVided With interval in the left-right direction, the pin hole in left is corresponded to the positioning hole in the left, and the pin hole in right is corresponded to the positioning hole in the right, the alignment pins 35 are inserted into the positioning holes on left side and right side, and tWo alignment pins 35 are inserted into the tWo pin holes correspondingly, the middle portion of the bearing table 29 is recessed doWnWard and integrally-fonned, Which is provided With a cuboid groove that is the same as the shape of the acrylic cuboid block 23, and the acrylic cuboid block 23 is embedded in the cuboid groove, the middle portion of groove bottom of the cuboid groove is provided With several second through-holes 36 Which is in one-to-one correspondence With each first through-hole 27 from top to bottom, and each second through- hole 36 is passed down through by each screw interface correspondingly.
In the step (2), specifically, opening the sealing cap, and adding the grout Which is configured according to requirements into the grout tank 1 through the grout filling inlet 5, stirring the grout evenly by the agitation device 9 to prevent grout deposition, and starting the air pump 19, setting gas injection pressure to a certain value Which is higher than required grouting pressure through the gas pressure regulating valve 22.
In the step (3), specifically, a corresponding number of the acrylic long plate 24 are selected according to the requirements of test for fracture Width, and based on the requirements of test of fracture roughness, several pieces of alloy sheets 38 With interval in the left-right direction are attached to one side surface of the corresponding acrylic long plate 24 to form equidistant protuberance, Which is used to simulate rough fracture, the alloy sheet 38 With different thickness can simulate the fracture With different roughness, then, the selected acrylic long plate 24 is inserted into the each corresponding slot Which is bilateral symmetry in the cuboid fracture passage 25 along the left-right direction in a sequential order from the front side and rear side to the middle of cuboid fracture passage, so as to form the fracture required for the test, Wherein, the side surface of the acrylic long plate 24 attached With the alloy sheet 38 is served as the side surface of the fracture, then the left end and right end of the acrylic cuboid block 23 are Wrapped by rubber membrane to block the left end and right end of the cuboid fracture passage 25, and then the acrylic cuboid block 23 is assembled into the cuboid groove in the middle portion of the bearing table 29, so that each second through-hole 36 is passed doWn through by each screW interface, Which is in one-to- one correspondence With each second through-hole 36, then the left-most screW interface is connected to the grout discharge valve, While the right-most screW interface is connected to the grout outlet 6 of the grout tank 1 through the grout injection pipe 10, each screW interface in the middle is connected to the sampling valve or the pressure sensor, depending on the requirements of test.
In the step (4), specifically, rotating the rotary tray 30 to required angle, Which driVes the acrylic cuboid block 23 to the required angle through the bearing plate, and then inserting two alignment pins 35 into the positioning holes on left side and right side respectively, so as to insert the two alignment pins 35 into the two pin holes correspondingly and fasten the rotary tray 30 to perform fracture seepage test at different inclination angles.
In the step (5), specifically, opening the grout injection ValVe 11 and the grout discharge ValVe, pumping the grout in the grout tank 1 into the fracture in the acrylic cuboid block 23 through the grout injection pipe 10 under the gas injection pressure, the grout is migrated through from right to left in the fracture, and then is discharged from the fracture through the grout discharge ValVe, in this way, the migration process of the grout can be observed, if it is necessary to measure the pressure of the grout in the seepage migration process, each screw interface in the middle is connected to the pressure sensor, and the computer 2 is signal-connected to each pressure sensor, which allows each pressure sensor to monitor the pressure of the grout in the seepage migration process in real time, at the same time, the grout flow meter 12 is used for monitoring the flow rate of the grout in real time, the computer 2 is used for analyzing the pressure and the flow rate of the grout in the seepage migration process, thereby measuring pressure Variation law of the grout in the seepage migration process, when sampling of the grout is required, the screw interface in the middle is connected to the sampling ValVe, and the sampling can be performed through the sampling ValVe, wherein the Voltage regulator 20 and gas pressure regulating Valve 22 can be used to stabilize the gas pressure in the grout tank 1 under a set injection pressure, thereby achieving constant pressure grouting function during test process.
In the step (6), specifically, after the test is completed, tuming off the grout injection ValVe 11 and the air pump 19, and tuming on the water injection pump 15 which injects a certain amount of fresh water from the water tank 14 into the grout tank 1 through the water injection pipe 7, and then turning off the water injection pump 15 wherein the fresh water is stirred to clean an interior of the grout tank 1 through the agitation deVice 9, opening the grout injection Valve 11 and the air pump 19 again, and injecting the fresh water from the grout tank 1 into the fracture in the acrylic cuboid block 23 through the grout injection pipe 10 and discharging the fresh water completely through the grout discharge Valve, at the same time, the air pump 19 is also used to blow out remaining fresh 11 Water inside the grout injection pipe 10 to avoid the effect of the composition of the grout during next grouting test, the fresh Water can be used to clean the grout injection pipe 10 and the interior of the fracture during the floWing process in the grout injection pipe 10 and the fracture, turning off the grout injection Valve 11 and the air pump 19 again, and turning on the Water injection pump 15 Which injects a certain amount of fresh Water from the Water tank 14 into the grout tank 1 through the Water injection pipe 7, and then tuming off the Water injection pump 15, Wherein the fresh Water is stirred to clean the interior of the grout tank 1 through the agitation device 9, then opening the grout injection valve 11 and the air pump 19 again, and injecting the fresh Water from the grout tank 1 into the fracture in the acrylic cuboid block 23 through the grout injection pipe 10 and discharging the fresh Water completely through the grout discharge valve, at the same time, the air pump 19 is also used to bloW out the remaining fresh Water inside the grout injection pipe 10 to avoid the effect of the composition of the grout during the next grouting test, the fresh Water can be used to clean the grout injection pipe 10 and the interior of the fracture during the floWing process in the grout injection pipe 10 and the fracture, repeating the above operations multiple times and cleaning entire system to facilitate for the next test.
The sealing cap, the screW interface, the grout discharge valve, the sampling valve, the pressure sensor, and the pin hole are not shoWn in the draWings, the agitation device 9 is an existing conventional technology, and its specific structure and Working principle are not described in detail.
The fracture With the maximum Width required for the test is cuboid fracture passage 25 Without inserting the acrylic long plate 24, inserting different quantities of the acrylic long plate 24 can change the Width of the intemal cavity of the cuboid fracture passage 25, so as to obtain the fractures With different Widths.
Claims (5)
1. A visualized test method Which is for single fracture grouting seepage and in Which Width and roughness are Variable, characterized in that, the visualized test method Which is for single fracture grouting seepage and in Which Width and roughness are Variable specifically comprises the following steps: step (1) designing a visualized test system for simulating a plurality of types of single fracture grouting seepage, this visualized test system for simulating a plurality of types of single fracture grouting seepage comprises a Water injection device, a constant-pressure gas injection device, a grout tank, a visualized single fracture seepage device, a rotary bearing device and a computer, a Water injection port and a gas injection port are provided in a top of the grout tank, an upper side portion of an outer side Wall of the grout tank is provided With a grout filling inlet With a sealing cap, a grout outlet is provided in a bottom portion of the grout tank, a Water outlet of the Water injection device is connected to the Water injection port of the grout tank through a Water injection pipe, a gas outlet of the constant-pressure gas injection device is connected to the gas injection port of the grout tank through a gas injection pipe, an agitation device is provided inside the grout tank, and the visualized single fracture seepage device is installed on the rotary bearing device, the grout outlet of the grout tank is connected to a grout injection port of the visualized single fracture seepage device through a grout injection pipe, on Which a grout injection valve, a grout floW meter and a grout injection pressure meter are sequentially installed along floW direction, the computer is respectively signal-connected to the visualized single fracture seepage device, the grout floW meter and the grout injection pressure meter; step (2) adding a grout wliicli is corrfigiirecí according to requirements into the grout tank, and stirring evenly through the agitation device; step (3) constructing the visualized single fracture seepage device on the rotary bearing device according to requirements of test; step (4) adjusting an inclination angle of the visualized single fracture seepage device through the rotary bearing device;step (5) injecting a gas into the grout tank through the constant-pressure gas injection device, injecting the grout Which is inside the grout tank into the visualized single fracture seepage device to observe and study a migration process of the grout; step (6) after the test is completed, cleaning a Whole system through the Water injection device and the constant-pressure gas injection device for next test, the Water injection device comprises a Water tank, a Water injection pump, a liquid floW meter and a liquid pressure re gulating valve, the Water outlet of the Water tank is connected to a Water inlet of the Water injection pump through a Water pumping pipe, the Water outlet of the Water injection pump is connected to the Water injection port of the grout tank through the Water injection pipe, the liquid floW meter and the liquid pressure regulating valve are sequentially provided on the Water injection pipe along liquid floW direction, and the computer is respectively signal-connected to the liquid floW meter and the liquid pressure regulating valve, the constant-pressure gas injection device comprises an air pump, a voltage regulator, a gas floW meter, and a gas pressure regulating valve, the gas outlet of the air pump is connected to the gas injection port of the grout tank through the gas injection pipe, the voltage regulator, the gas floW meter and the gas pressure regulating valve are sequentially provided on the gas injection pipe along gas floW direction, the computer is respectively signal-connected to the gas floW meter and the gas pressure regulating valve, the visualized single fracture seepage device comprises an acrylic cuboid block and several pieces of acrylic long plate, the acrylic cuboid block is provided horizontally along left-right direction, and a middle portion of the acrylic cuboid block is provided With a cuboid fracture passage along the left-right direction, the cuboid fracture passage are transparent in left and right sides, and both of front side portion and rear side portion of left end of upper and loWer surface inside the cuboid fracture passage and the front side portion and rear side portion of right end of the upper and loWer surface inside the cuboid fracture passage are integrally-fonned and provided With several card strips With interval in front-rear direction, each card strip in the front side is in one-to-one correspondence With each card strip on the rear side in the front-rear direction respectively, a slot is formed betWeen tWo adj acent card strips for inserting the acrylic long plate, and height of the acrylic long plate is the same as that of the cuboid fracture passage, each piece of the acrylic long plate isvertically inserted into the each corresponding slot Which is bilateral symmetry in the cuboid fracture passage along the left-right direction respectively, the middle portion of loWer surface of the acrylic cuboid block is provided With several first through-holes provided With interval in the left-right direction, the first through-holes are in communication With the cuboid fracture passage, and each first through-hole is installed With a screW interface, a left-most screW interface is connected With a grout discharge valve, While a right-most screW interface is connected to the grout outlet of the grout tank through the grout injection pipe, each screW interface in the middle is connected With a sampling valve or a pressure sensor, the computer is respectively signal-connected to each pressure sensor, the rotary bearing device comprises a rectangle steel frame, a bearing table and a rotary tray, the rectangle steel frame is provided horizontally, the rectangle steel frame is Welded by four square steel pipes end to end, the bottom portion of the rectangle steel frame is fixed and supported on the ground by a column, the bearing table Which is a steel plate is provided horizontally in the rectangle steel frame, the middle portion of front side and the middle portion of rear side of the bearing table are connected With a rotary shaft provided horizontally along the front-rear direction, the front side of the rotary shaft is rotatably connected to a front side steel pipe of the rectangle steel frame, the rear side of the rotary shaft is rotatably connected to a rear side steel pipe of the rectangle steel frame, and the front side steel pipe of the rectangle steel frame is passed through by a front end of the front side of the rotary shaft, the rotary tray is provided vertically along the left-right direction, a center of rear side surface of the rotary tray is fixed at the front end of the front side of the rotary shaft, a front side surface of the rotary tray is engraved With an angle scale line, the rotary tray is provided With several angle positioning holes Which are provided in a circular pattern, a central angle betWeen tWo adjacent angle positioning holes is the same as a unit angle of the angle scale line, the front side steel pipe of the rectangle steel frame is provided With tWo pin holes Which are transparent in the front-rear direction and provided With interval in the left-right direction, the pin hole in left is corresponded to the positioning hole in the left, and the pin hole in right is corresponded to the positioning hole in the right, alignment pins are inserted into the positioning holes on left side and right side, and tWo alignment pins are inserted into the tWo pin holes correspondingly, the middle portion of the bearing table is recessed doWnWard and integrally-forined, Which is provided With a cuboid groove that is the same as the shape of the acrylic cuboid block, and the acrylic cuboid block is embedded in the cuboid groove, the middle portion of groove bottom of the cuboid groove is provided with several second through-holes which is in one-to-one correspondence with each first through-hole from top to bottom, and each second through-hole is passed down through by each screw interface correspondingly, in the step (3), specifically, a corresponding number of the acrylic long plate are selected according to the requirements of test for fracture width, and based on the requirements of test of fracture roughness, several pieces of alloy sheets with interval in the left-right direction are attached to one side surface of the corresponding acrylic long plate to form equidistant protuberance, which is used to simulate rough fracture, the alloy sheet with different thickness can simulate the fracture with different roughness, then, the selected acrylic long plate is inserted into the each corresponding slot Which is bilateral symmetry in the cuboid fracture passage along the left-right direction in a sequential order from the front side and rear side to the middle of cuboid fracture passage, so as to form the fracture required for the test, wherein, the side surface of the acrylic long plate attached with alloy sheet is served as the side surface of the fracture, then the left end and right end of the acrylic cuboid block are wrapped by rubber membrane to block the left end and right end of the cuboid fracture passage, and then the acrylic cuboid block is assembled into the cuboid groove in the middle portion of the bearing table, so that each second through-hole is passed down through by each screw interface, which is in one-to-one correspondence with each second through-hole, then the left-most screw interface is connected to the grout discharge valve, while the right-most screw interface is connected to the grout outlet of the grout tank through the grout injection pipe, each screw interface in the middle is connected to the sampling valve or the pressure sensor, depending on the requirements of test.
2. The visualized test method which is for single fracture grouting seepage and in which width and roughness are variable according to claim l, characterized in that, in the step (2), specifically, opening the sealing cap, and adding the grout which is configured according to requirements into the grout tank through the grout filling inlet, stirring the grout evenly by the agitation device to prevent grout deposition, and starting the air pump, setting gas injection pressure to a certain valueWhich is higher than required grouting pressure through the gas pressure regulating Valve.
3. The Visualized test method Which is for single fracture grouting seepage and in Which Width and roughness are Variable according to claim l, characterized in that, in the step (4), specifically, rotating the rotary tray to required angle, Which driVes the acrylic cuboid block to the required angle through the bearing plate, and then inserting tWo alignment pins into the positioning holes on left side and right side respectiVely, so as to insert the tWo alignment pins into the tWo pin holes correspondingly and fasten the rotary tray to perform fracture seepage test at different inclination angles.
4. The Visualized test method Which is for single fracture grouting seepage and in Which Width and roughness are Variable according to claim l, characterized in that, in the step (5), specifically, opening the grout injection ValVe and the grout discharge ValVe, pumping the grout in the grout tank into the fracture in the acrylic cuboid block through the grout injection pipe under the gas injection pressure, the grout is migrated through from right to left in the fracture, and then is discharged from the fracture through the grout discharge ValVe, in this Way, the migration process of the grout can be observed, if it is necessary to measure the pressure of the grout in the seepage migration process, each screW interface in the middle is connected to the pressure sensor, and the computer is signal- connected to each pressure sensor, Which alloWs each pressure sensor to monitor the pressure of the grout in the seepage migration process in real time, at the same time, the grout floW meter is used for monitoring the floW rate of the grout in real time, the computer is used for analyzing the pressure and the floW rate of the grout in the seepage migration process, thereby measuring pressure Variation laW of the grout in the seepage migration process, When sampling of the grout is required, the screW interface in the middle is connected to the sampling ValVe, and the sampling can be performed through the sampling ValVe, Wherein the Voltage regulator and gas pressure regulating ValVe can be used to stabilize the gas pressure in the grout tank under a set injection pressure, thereby achieVing constant pressure grouting function during test process.
5. The Visualized test method Which is for single fracture grouting seepage and in Which Widthand roughness are Variable according to claim l, characterized in that, in the step (6), specifically, after the test is completed, turning off the grout injection valve and the air pump, and turning on the Water injection pump Which injects a certain amount of fresh Water from the Water tank into the grout tank through the Water injection pipe, and then tuming off the Water injection pump Wherein the fresh Water is stirred to clean an interior of the grout tank through the agitation device, opening the grout injection Valve and the air pump again, and injecting the fresh Water from the grout tank into the fracture in the acrylic cuboid block through the grout injection pipe and discharging the fresh Water completely through the grout discharge valve, at the same time, the air pump is also used to bloW out remaining fresh Water inside the grout injection pipe to avoid the effect of the composition of the grout during next grouting test, the fresh Water can be used to clean the grout injection pipe and the interior of the fracture during the floWing process in the grout injection pipe and the fracture, tuming off the grout injection valve and the air pump again, and tuming on the Water injection pump Which injects a certain amount of fresh Water from the Water tank into the grout tank through the Water injection pipe, and then tuming off the Water injection pump, Wherein the fresh Water is stirred to clean the interior of the grout tank through the agitation device, then opening the grout injection valve and the air pump again, and injecting the fresh Water from the grout tank into the fracture in the acrylic cuboid block through the grout injection pipe and discharging the fresh Water completely through the grout discharge valve, at the same time, the air pump is also used to bloW out the remaining fresh Water inside the grout injection pipe to avoid the effect of the composition of the grout during the next grouting test, the fresh Water can be used to clean the grout injection pipe and the interior of the fracture during the floWing process in the grout injection pipe and the fracture, repeating the above operations multiple times and cleaning entire system to facilitate for the next test.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210549618.8A CN114878434B (en) | 2022-05-20 | 2022-05-20 | Single-crack grouting seepage visualization test method with variable width and roughness |
| PCT/CN2023/083806 WO2023160725A1 (en) | 2022-05-20 | 2023-03-24 | Visualized test method which is for single fracture grouting seepage and in which width and roughness are variable |
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| SE2351091A1 true SE2351091A1 (en) | 2023-09-19 |
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| SE2351091A SE2351091A1 (en) | 2022-05-20 | 2023-03-24 | Visualized test method which is for single fracture grouting seepage and in which width and roughness are variable |
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| Country | Link |
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| CN (1) | CN114878434B (en) |
| SE (1) | SE2351091A1 (en) |
| WO (1) | WO2023160725A1 (en) |
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| CN114878434B (en) * | 2022-05-20 | 2023-06-30 | 河南理工大学 | Single-crack grouting seepage visualization test method with variable width and roughness |
| CN115639112B (en) * | 2022-10-31 | 2025-07-25 | 中煤能源研究院有限责任公司 | Constant-pressure crack grouting control system and control method |
| CN116223334B (en) * | 2023-01-10 | 2024-09-06 | 中国石油大学(北京) | Visual seepage simulation device for variable dip angle of strong heterogeneous fractured reservoir and application thereof |
| CN116539813B (en) * | 2023-05-25 | 2024-04-09 | 西南石油大学 | Wall roughness adjustable crack medium microorganism mineralization shutoff model device |
| CN117268703B (en) * | 2023-09-25 | 2024-10-18 | 山东建筑大学 | A waterproof and leak-proof testing system and method for composite grouting materials |
| CN117848926A (en) * | 2024-01-31 | 2024-04-09 | 中国地质大学（武汉） | Rock and soil seepage experimental device |
| CN118225524B (en) * | 2024-02-20 | 2024-09-24 | 中国矿业大学 | Abandoned mine coal void-crack-pore medium reconstruction device and reconstruction method |
| CN118278265B (en) * | 2024-02-28 | 2024-09-20 | 山东大学 | Tunnel grouting hole distribution method and system based on rock mass fracture space correlation analysis |
| CN119023539B (en) * | 2024-10-28 | 2025-01-28 | 平安检测科技(山东)集团有限公司 | Ground permeability testing device for highway maintenance |
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| CN120628829B (en) * | 2025-08-13 | 2025-11-18 | 武汉大学 | An experimental apparatus and method for visualizing seepage and erosion in filled fractures. |
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2023
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2023160725A9 (en) | 2023-10-26 |
| CN114878434A (en) | 2022-08-09 |
| CN114878434B (en) | 2023-06-30 |
| WO2023160725A1 (en) | 2023-08-31 |
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