CN109681206A - A method of coal mining and filling to control surface subsidence - Google Patents
A method of coal mining and filling to control surface subsidence Download PDFInfo
- Publication number
- CN109681206A CN109681206A CN201810947745.7A CN201810947745A CN109681206A CN 109681206 A CN109681206 A CN 109681206A CN 201810947745 A CN201810947745 A CN 201810947745A CN 109681206 A CN109681206 A CN 109681206A
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- filling
- coal mining
- strip
- coal
- caving
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for controlling surface subsidence by coal mining filling, which comprises the following steps: calculating the load of each rock stratum according to the physical and mechanical properties of the mine rock stratum, and if the load of the rock stratum is smaller than that of the lower rock stratum, taking the rock stratum as a key layer to find out all the key layers; the side of the coal seam is used as a coal face, and the coal face is provided with: the filling support is used for constructing a waste rock filling strip along the advancing direction every time the coal face is advanced forward for a distance during coal mining, and forming a caving roof strip by a caving method, wherein the waste rock filling strip and the caving roof strip are arranged at intervals; forming a separation space when the film collapses; and filling a high-water material into the separation space to form a high-water filling body, thereby realizing a combined supporting system of the filling strip and the high-water filling body. The method for controlling the ground surface settlement by coal mining filling combines gangue filling and high-water material filling to control the ground surface settlement, thereby not only improving the supporting effect, but also reducing the cost.
Description
Technical field
The invention belongs to coal mine filling technical fields, and in particular to a method of filling control ground settlement of mining.
Background technique
China's coal-mine production history is long, and Exploitation Scope is wide, especially the emphasis producing coal such as Shanxi province, mining inetesity compared with
Greatly, left over by history goaf area is wide, and goaf surface subsidence destroys serious.Coal wall is the most common coal-getter in China
Make one of face, has many advantages, such as to mine high-efficient, tunnelling is few.
In recent years, as the progress of coal mine filling machinery, especially fully mechanized mining fill succeeding in developing for integrated special stand,
Occur carrying out the technology of waste filling, i.e. comprehensive mechanization waste filling using comprehensive mechanization again.
Comprehensive mechanization waste filling collection " it is heavy to subtract " and " emission reduction " Yu Yiti, used in special filling bracket front be it is general
Logical fully mechanized mining supporter, bracket rear portion has suspended a drag conveyor in midair on top beam to convey waste filling material.Working face is first adopted
It is filled after coal, goaf is with adopting with filling, it is ensured that most of space in goaf is filled by spoil in time, and with waste filling body
The movement of Strata Overlying The Seam is limited, to realize the purpose of control subsidence.The obturation that the technology uses is spoil
Flyash mixture has many advantages, such as that non-deformability is strong, steady in a long-term, and can eliminate hillock generally existing on mine
Deng being a kind of ideal filler.
But that there are dosages is too big for comprehensive mechanization waste filling, material source is less, and the disadvantages of higher cost, reaches
Increase cost of ton coal 70-80 member has been arrived, cannot have been used on a large scale.The cost of waste filling, which becomes, limits its large-scale application
Main problem.In addition, the disadvantage that comprehensive mechanization waste filling is too low there is also coal mining efficiency, the average annual producing coal amount of working face does not surpass
Cross 1,000,000 tons.
Therefore, by reducing spoil dosage to reduce cost, and improving working face coal mining efficiency is waste filling from now on
Developing direction.High-water material filling is using water volume ratio be more than 90% a kind of new technology for being filled of high-water material,
Its major advantage is that material source is unrestricted, and cost is relatively low, and high-water material can be delivered to and be filled by pipeline or drilling
Fill out region, but exist and need to construct dedicated template system in goaf, the bleeding of material (refer to cement slurry contained humidity from
The complexity being precipitated in slurry) and long-time stability it is poor the disadvantages of.
Summary of the invention
The object of the present invention is to provide a kind of methods of filling control ground settlement of mining, and this method solve existing spoils
The big problem at high cost of dosage is filled, support is combined by waste filling band and high*.water packing body, there is good support
Effect realizes the control to ground settlement.
In order to achieve the above object, the present invention provides a kind of method of filling control ground settlement of mining, this method packets
Contain:
(S1) side in coal seam is provided with filling bracket as coal working face on the coal working face, is mining
When, the coal working face often pushes ahead a distance, constructs waste filling band along direction of propulsion, and pass through caving method shape
At being caving top plate band, and the waste filling band and described it is caving the spaced setting of top plate item；
(S2) according to the physico-mechanical properties of mine rock, the load (q of each rock stratum is calculatedi)1, i=1 ... n, if rock stratum i
+ 1 load (qi)1Less than the load (q of its lower layer rock stratum ii-1)1, then rock stratum i+1 finds out all key stratums as key stratum；
(S3) when being caving, formed between each key stratum being caving above top plate band and its lower layer rock stratum from
Sheaf space；
(S4) key stratum on the absciss layer space drills to form slip casting channel, the absciss layer space and slip casting channel
It communicating, high-water material is sequentially filled from bottom to up in the absciss layer space by the slip casting channel, high*.water packing body is formed,
Realization waste filling band combines support system with high*.water packing body, to support rock stratum and topsoil.
Preferably, in the step (S2), the physico-mechanical properties include: the elastic modulus E of each rock stratum ii、
Thickness hiWith bulk density γi。
It is preferably, described to calculate the formula used in the step (S2) are as follows:
Preferably, in the step (S1), the waste filling band is inclined longwall waste filling band, is adopted
It is filled with comprehensive mechanization waste filling method.
Preferably, it the waste filling band and is caving the width of top plate band and is pushed ahead with the coal working face
Be equidistant.
Preferably, the distance that the coal working face is pushed ahead is 40m.
The method of coal mining filling control ground settlement of the invention, solves that existing waste filling dosage is big at high cost to ask
Topic, has the advantage that
(1) method of the invention to goaf rear carried out part waste filling, using waste filling band with collapse
The spaced setting of caving lath, the waste filling more complete than goaf of the range of local spoil strip filling shorten half, reduce
Cost is also reduced while spoil dosage, and improves the fltting speed of coal working face, improves coal mining efficiency；
(2) method of the invention use high*.water packing, need to carry out after spoil band is formed, in process with mine and cash
Stone filling does not clash, and can carry out parallel, and filling range is the absciss layer space below each key stratum, key stratum and its underpart
Rock stratum form template system required for high*.water packing just, avoid and construct special template system, not only reduce
Filling work procedure, and the cost of high*.water packing is also reduced, it can largely use；
(3) method of the invention uses spoil band combination high*.water packing, realizes mutual supplement with each other's advantages, and overcome respective
Defect is formd using spoil band as supportive body, the filling system supplemented by high*.water packing absciss layer space, can be preferably real
Now control the purpose of subsidence.
Detailed description of the invention
Fig. 1 is the vertical section schematic diagram of inclined longwall spoil band and high*.water packing of the invention.
Fig. 2 is the floor map of inclined longwall spoil band and high*.water packing of the invention.
Fig. 3 is the calculating schematic diagram of key stratum in mine rock of the invention.
Specific embodiment
Below in conjunction with drawings and examples, the following further describes the technical solution of the present invention.
A method of filling control ground settlement of mining, this method includes:
(S1) as shown in Figure 1, being the vertical section schematic diagram of inclined longwall spoil band and high*.water packing of the invention, such as scheme
It is the floor map of inclined longwall spoil band and high*.water packing of the invention, the side in coal seam 1 is as coal-getter shown in 2
Make face 9, be provided on the coal working face 9 filling bracket 10, mine when, coal working face 9 often push ahead one away from
From constructing waste filling band 8 along direction of propulsion, and be caving top plate band 7, and waste filling band 8 by caving method formation
It is arranged with the interval of top plate band 7 is caving；
(S2) as shown in figure 3, being the calculating schematic diagram of key stratum in mine rock of the invention, according to the object of mine rock
Mechanical property is managed, the load (q of each rock stratum 2 is calculatedi)1, i=1 ... n, if the load q of rock stratum i+1i1Less than its lower layer rock stratum i
Load (qi-1)1, then rock stratum i+1 finds out all key stratums 3 as key stratum 3；
(S3) when being caving, absciss layer is formed between each key stratum 3 being caving above top plate band 7 and its lower layer rock stratum 2
Space 6；
(S4) drilling of key stratum 3 on absciss layer space 6 forms slip casting channel 5, and absciss layer space 6 is communicated with slip casting channel 5,
High-water material is sequentially filled in absciss layer space 6 by the slip casting channel 5 from lower layer to upper layer, and high*.water packing body is formed, and is realized
Waste filling band combines support system with high*.water packing body, to support rock stratum 2 and topsoil 4.
In step (S2), physico-mechanical properties include: the elastic modulus E of each rock stratum ii, thickness hiWith bulk density γi。
In step (S2), the formula of use is calculated are as follows:
In step (S1), waste filling band 8 is inclined longwall waste filling band, uses comprehensive mechanization spoil
Placement method is filled.
Waste filling band 8 and the width for being caving top plate band 7 are equidistant with what coal working face 9 was pushed ahead.
The distance that coal working face (9) is pushed ahead is 40m.The distance that coal working face 9 is pushed ahead every time is bigger, then
Coal mining efficiency is higher, but the effect for controlling ground settlement is then poorer；Effect that is on the contrary then controlling ground settlement is better, effect of mining
Rate is lower.Keep waste filling band 8 and be caving top plate band 7 width pushed ahead with coal working face 9 at a distance from phase
Deng to guarantee that earth's surface will not settle.
Embodiment 1
A method of filling control ground settlement of mining is as depicted in figs. 1 and 2 comprehensive mechanical behind front coal seam 1
Change coal mining with gangue backfilling working face 9, coal working face 9, which is disposed with, fills hydraulic support 10,8 arranged for interval of waste filling band,
Spacing distance is 40m, uses caving method to manage top plate between waste filling band 8, is formed after being caving and be caving top plate band 7.
The every forward impelling 40m of coal working face 9 of comprehensive mechanization waste filling carries out packing job, constructs along propulsion side
The waste filling band 8 for being 40m to width, waste filling band 8 and is caving 7 arranged for interval of top plate band, is caving top plate band 7
Width be also 40m.
As shown in figure 3, pressing formulaCalculate stratum load, wherein Ei、hiWith
γiElasticity modulus, thickness and the bulk density of respectively each rock stratum i；It is successively up calculated according to formula from rock stratum 1, when present (qi+1)1
< (qi)1, i.e., upper one layer of load is less than the load of lower layer, then i+1 layer rock stratum is key stratum 3, up calculates arrive table always
The rock stratum n of 4 lower part of soil layer, until finding out all key stratums 3, lower each key stratum 3 is possible absciss layer space 6, slip casting channel 5
It needs to penetrate each key stratum 3, and injects high-water material (high-moisture quick-setting consolidates material) since bottom key stratum 3, until top layer
Key stratum 3.
Slip casting channel 5, the absciss layer space of 3 lower part of key stratum are drilled under each key stratum 3 for being caving 7 top of top plate band
6 are filled with high-water material, form high*.water packing body；Formed the joint support system of waste filling band 8 and high*.water packing body with
Support top rock stratum 2 and topsoil 4.
Method of the invention is formd by constructing waste filling band and carrying out overlying strata separation layer high-water material grouting filling
The support system of spoil band and high*.water packing body, waste filling band are supportive bodies, and the main function of high*.water packing body is
Guarantee that each key stratum is not broken, avoid key stratum fracture and involve earth's surface, and what is carried out to goaf is partial stowage, than
All filling reduces the charging quantity of half, has both considered coal mining efficiency, it is contemplated that the effect of control ground settlement, improves
The fltting speed of coal working face, and economic benefit is also improved accordingly.
In conclusion the method for coal mining filling control ground settlement of the invention passes through joint waste filling and high-water material
Filling, to control ground settlement, not only increases support effect, reduces costs, but also be able to achieve more massive exploitation
Filling.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (6)
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145363A (en) * | 2019-04-30 | 2019-08-20 | 中国矿业大学(北京) | A Roof Control Method Realizing the Transition from Caving to Filling Mining in Fully Mechanized Mining Face |
| CN110424966A (en) * | 2019-07-25 | 2019-11-08 | 中国矿业大学 | A kind of pumping of ultrahigh water material filling working face spoil stays lane without pillar mining method |
| CN110552717A (en) * | 2019-05-27 | 2019-12-10 | 中铁十八局集团第四工程有限公司 | sand cobble stratum shield tunnel earth surface layering differential settlement space grouting settlement reduction method |
| CN110593874A (en) * | 2019-10-09 | 2019-12-20 | 中国矿业大学 | A method for full mining and full charging of strong, weak and strong coal mines |
| CN110671145A (en) * | 2019-10-24 | 2020-01-10 | 中国煤炭地质总局勘查研究总院 | Large-mining-width thick coal seam mining composite grouting method |
| CN112049682A (en) * | 2020-10-23 | 2020-12-08 | 孙嘉岐 | Goaf coal gangue supporting solid filling method |
| CN112360550A (en) * | 2020-10-28 | 2021-02-12 | 安徽理工大学 | Method for injecting and filling coal-based solid waste paste in low-position roof separation zone in gob-side entry retaining |
| CN115341903A (en) * | 2022-08-19 | 2022-11-15 | 中国矿业大学 | Underground coal mining design method for coal mining and farmland protection collaborative development |
| CN115962007A (en) * | 2023-02-21 | 2023-04-14 | 山西文龙中美环能科技股份有限公司 | Atypical key layer filling mining method for coal mine |
| CN116556953A (en) * | 2023-05-25 | 2023-08-08 | 中国矿业大学 | A very close-distance coal seam strip cemented filling upward mining and gas control method |
| CN117449900A (en) * | 2023-10-12 | 2024-01-26 | 北京科技大学 | A method to control the movement of rock formations and surface subsidence in stopes |
| CN117868972A (en) * | 2023-12-06 | 2024-04-12 | 中国矿业大学 | High-level gangue filling method for long-wall working surface caving zone |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145363A (en) * | 2019-04-30 | 2019-08-20 | 中国矿业大学(北京) | A Roof Control Method Realizing the Transition from Caving to Filling Mining in Fully Mechanized Mining Face |
| CN110145363B (en) * | 2019-04-30 | 2024-03-29 | 中国矿业大学(北京) | Roof control method for realizing transition from fully mechanized mining face caving to filling mining |
| CN110552717A (en) * | 2019-05-27 | 2019-12-10 | 中铁十八局集团第四工程有限公司 | sand cobble stratum shield tunnel earth surface layering differential settlement space grouting settlement reduction method |
| CN110424966A (en) * | 2019-07-25 | 2019-11-08 | 中国矿业大学 | A kind of pumping of ultrahigh water material filling working face spoil stays lane without pillar mining method |
| WO2021068691A1 (en) * | 2019-10-09 | 2021-04-15 | 巨峰 | Strong-weak-strong clean mining and full filling method for coal mine |
| CN110593874A (en) * | 2019-10-09 | 2019-12-20 | 中国矿业大学 | A method for full mining and full charging of strong, weak and strong coal mines |
| CN110593874B (en) * | 2019-10-09 | 2020-12-01 | 中国矿业大学 | A kind of coal mine strong and weak strong full mining and full charging method |
| CN110671145A (en) * | 2019-10-24 | 2020-01-10 | 中国煤炭地质总局勘查研究总院 | Large-mining-width thick coal seam mining composite grouting method |
| CN112049682A (en) * | 2020-10-23 | 2020-12-08 | 孙嘉岐 | Goaf coal gangue supporting solid filling method |
| CN112360550A (en) * | 2020-10-28 | 2021-02-12 | 安徽理工大学 | Method for injecting and filling coal-based solid waste paste in low-position roof separation zone in gob-side entry retaining |
| CN115341903A (en) * | 2022-08-19 | 2022-11-15 | 中国矿业大学 | Underground coal mining design method for coal mining and farmland protection collaborative development |
| CN115962007A (en) * | 2023-02-21 | 2023-04-14 | 山西文龙中美环能科技股份有限公司 | Atypical key layer filling mining method for coal mine |
| CN116556953A (en) * | 2023-05-25 | 2023-08-08 | 中国矿业大学 | A very close-distance coal seam strip cemented filling upward mining and gas control method |
| CN116556953B (en) * | 2023-05-25 | 2025-10-28 | 中国矿业大学 | A method for upward mining and gas control of extremely close-range coal seam strip cementation filling |
| CN117449900A (en) * | 2023-10-12 | 2024-01-26 | 北京科技大学 | A method to control the movement of rock formations and surface subsidence in stopes |
| CN117868972A (en) * | 2023-12-06 | 2024-04-12 | 中国矿业大学 | High-level gangue filling method for long-wall working surface caving zone |
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Application publication date: 20190426 |