CN116518812A - Blast hole plugging device for protecting leading-out foot line of blast hole and construction method thereof - Google Patents

Abstract

The invention discloses a blast hole plugging device for protecting a foot line led out from a blast hole and a construction method thereof, comprising a plugging shell and a plugging inner shaft; the blocking shell is embedded in the gun hole, is provided with an elastic cylindrical shell, the periphery of the cross section of the shell is a round periphery consistent with the size of the gun hole, and the inside of the shell is a hollow cavity with a non-round cross section; the periphery of the section of the inner blocking shaft is a non-circular section consistent with the hollow cavity of the blocking shell, and the inside of the inner blocking shaft is a channel for accommodating a pin wire led out from a blast hole; the blocking inner shaft is axially inserted into the hollow cavity of the blocking shell along the blast hole, and the rotating blocking inner shaft compresses the cylindrical shell of the blocking shell with the inner wall of the blast hole through the non-circular section shaft section. The blocking inner shaft inserted into the blocking outer shell is rotated, so that the blocking outer shell and a friction cushion block on the blocking outer shell press and fix the whole blocking device to the wall of the blast hole, the effective blocking of the blast hole is realized, the operation and construction method is simple, detonator leg wires led out of the blast hole can be effectively bundled and protected, and smooth detonation of the surrounding blast holes and flatness of a tunneling roadway are ensured.

Description

A blasthole plugging device and construction method for protecting blasthole lead-out line

technical field

The invention relates to a blast hole sealing device and a construction method thereof for protecting the lead-out line of the blast hole, and belongs to the technical field of rock blasting operations.

Background technique

In the process of mining and tunnel blasting and excavation, due to the different production processes of different detonator manufacturers and the differences in the operating specifications of the construction personnel during the charging process, during the blasting and excavation process, the redundant leg lines of the digital electronic detonators in the surrounding blastholes are often exposed in the excavation process. On the surface, after the cut hole is detonated, the blasting flying rocks may interrupt the digital electronic detonator legs of the surrounding blastholes, resulting in the inability to detonate the surrounding holes, and eventually lead to under-excavation in the roadway and failure of the explosive to detonate, which is a serious problem. Affect the safety and construction quality of the excavation face.

In response to this situation, during the charging process, construction workers often use local materials to wrap the foot line and stuff it into the blasthole, and then use rock powder or explosive packaging boxes left over from drilling to block the blasthole. This method presses and fixes the lead-out footline through the structure of blocking the blasthole. Although it has a certain effect, it often occurs that the blocking material is insufficient, and the materials are cumbersome. The rock powder is difficult to block and the plugging effect is not good. The pin line is easy to be broken or affected by disorderly current.

In modern blasting technology, special-purpose blasthole plugging tools also gradually appear, such as a double-layer inflatable tunnel drilling and blasting blasthole plugging device disclosed in a Chinese patent with application number CN202222293859.9. Gas, the expansion of the elastic inflatable sleeve can tightly seal the gap between the gun mud body and the inner wall of the blast hole. However, the plugging device of the airbag structure needs to be equipped with additional inflation equipment during operation, and the operation steps are also cumbersome; another example is a self-expandable packing body for blast hole plugging and its preparation and construction method disclosed in the Chinese patent application number CN202210725315.7 , through the characteristics of self-expanding tablet swelling when encountering water, the blast hole will be blocked. When the self-expanding agent is stored, it should avoid contact with water. It is inconvenient to store, and the cost is high, and the expansion of the self-expanding tablet is irreversible. When the hole is adjusted, it is inconvenient to disassemble and withdraw the blocking device.

Contents of the invention

The technical problem solved by the present invention is: aiming at the problem that the existing blasthole plugging tool cannot be well matched due to the inconvenient operation and complicated structure cost to solve the problem that the lead-out line in the blasthole is damaged by blasting, a kind of protective blasthole lead-out tool is provided. A blasthole plugging device for footlines and a construction method thereof.

The present invention adopts following technical scheme to realize:

A blasthole plugging device for protecting the lead-out line of the blasthole, comprising a plugging shell 1-1 and a plugging inner shaft 2-1; the plugging shell 1-1 is embedded in the blasthole opening, and has an elastic cylindrical shell , the outer circumference of the section of the shell is a circular outer circumference consistent with the size of the blast hole, and the inside is a hollow cavity with a non-circular cross-section; In order to accommodate the channel leading out of the blast hole; the plugging inner shaft 2-1 is inserted in the hollow cavity of the plugging shell 1-1 along the axial direction of the blast hole, and the rotating plugging inner shaft 2-1 passes through the non-circular section shaft section Compress the cylindrical casing and the inner wall of the blast hole to block the casing 1-1.

In a blasthole plugging device for protecting blasthole lead-out line of the present invention, further, a friction pad 1-2 is embedded on the outer wall surface of the plugging shell 1-1, and the friction pad 1-2 2 is a hard friction block whose coefficient of friction is greater than that of the blockage shell.

In a blasthole plugging device for protecting blasthole lead-out line of the present invention, specifically, the friction pad 1-2 is an arc-shaped block matching the outer periphery of the plugging shell 1-1, two groups The gasket is embedded along the circumferential direction of the plugging shell 1-1.

In a blasthole plugging device for protecting blasthole lead-out footlines according to the present invention, preferably, the friction pad 1-2 is an arc-shaped block with variable thickness, and the uppermost part of the modular pad 1-2 The thick part corresponds to the maximum deformation of the plugging shell 1-1 when the non-circular section of the inner shaft 2-1 is plugged.

In a blasthole plugging device for protecting blasthole lead-out lines of the present invention, specifically, the hollow cavity of the cylindrical shell of the plugging casing 1-1 is an elliptical section, and the center of the elliptical section is in contact with the plugging casing 1-1 is concentrically arranged on the circular outer circumference of the cylindrical shell, and the plugging inner shaft 2-1 has an elliptical cross-section shaft section matching it.

In a blasthole plugging device for protecting the blasthole lead-out line of the present invention, specifically, the inner hollow cavity of the blocked inner shaft 2-1 is open at one end close to the inner side of the blasthole, and the other end near the outer side of the blasthole A terminal twist cover 2-2 with a circular cross-section is arranged on the top, and the terminal twist cover 2-2 is arranged coaxially with the elliptical center axis of the blockage inner shaft 2-1, and its circumference diameter is not smaller than the blockage inner shaft 2-1 The distance from the major axis of the ellipse section is , and the end twist cover 2-2 is provided with a through hole for the foot wire to pass through.

In a blasthole plugging device for protecting the blasthole lead-out line of the present invention, specifically, the cylindrical shell of the plugging shell 1-1 is at the outer end of the blasthole for insertion of the plugging inner shaft 2-1. The opening is provided with a detachable shell closing cover 3-1 near the inner side of the gun hole, and the shell closing cover 3-1 is provided with a through hole for the foot wire to pass through.

In a blasthole plugging device for protecting blasthole lead-out line of the present invention, preferably, the plugging shell 1-1 is made of gutta-percha material, and the plugging inner shaft 2-1 is made of hard PC material .

In the blasthole plugging device for protecting the blasthole lead-out line of the present invention, preferably, the extrusion deformation of the non-circular section of the plugging inner shaft 2-1 to the plugging shell is 2 mm to 6 mm.

The present invention also discloses a construction method of the above-mentioned blasthole plugging device, which specifically includes the following steps:

Step 1: Determine the diameter of the blasthole to be plugged in the working face, clean up the debris in the blasthole, and then select the plugging shell corresponding to the diameter of the blasthole.

Step 2: After charging the blast hole, pass the line card connector and the foot wire through the through hole on the casing closure cover 3-1 outside the blast hole, and preliminarily gather the detonator leg wire.

Step 3, pass the line card connector and the foot wire through the plugging shell 1-1 to ensure that the leg wire in the blast hole is not twisted and folded, and when the foot wire is properly straightened, cover the shell closing cover 3-1 to the plug shell 1 After -1 is put on, plugging shell 1-1 is inserted into the gun hole.

Step 4, continue to pass the lead-out line card connector and foot wire outside the blast hole through the hollow cavity that blocks the inner shaft 2-1 and the through hole of the end twist cover 2-2, and after connecting the detonator foot wire, Store the excess length of the detonator foot wire into the hollow cavity of the plugging inner shaft 2-1, insert the plugging inner shaft 2-1 into the plugging shell 1-1, and at this time, the cross-section outer circumference of the plugging inner shaft 2-1 and the plugging The hollow cavity of the shell is consistent.

Step five, rotate the plugging inner shaft 2-1 through the end twisting cover 2-2, so that the plugging inner shaft 2-1 will press the cylindrical shell of the plugging shell 1-1 and the inner wall of the blast hole, and press the plugging shell 1-1 The friction pads on the 1 are pressed together to the inner wall of the blast hole until the plugging shell 1-1 is fixedly blocked at the blast hole.

Step 6: Bundle the feet drawn from all the blastholes on the working face together, place them together along the excavation working face after sorting out, and detonate after the preparation work in the blasting area is completed.

The present invention has following beneficial effect:

The blast hole sealing device provided by the present invention can effectively confine the detonator leg line drawn from the blast hole, so that the leg line can be built into the blast hole without being knotted or broken, and is not easily interrupted or pulled out by blasting flying stones. It effectively solves the problem that the detonator leg line drawn from the blast hole on the working face is easily damaged by the blasting and the explosives fail to explode. This ensures the smooth initiation of the surrounding holes and the smoothness of the excavation roadway, and effectively controls over-excavation. Dig, and the smooth detonation of the dynamite. The blasthole plugging device of the present invention only needs to be inserted into the plugging inner shaft of the plugging casing while rotating, so that the plugging casing and the friction pads on it can be pressed against the blasthole wall to fix the whole plugging device, so that the blasthole can be effectively blocked and the operation and construction can be realized. The method is simple, the cost of materials for blocking the outer shell and the inner shaft is low, and the work efficiency and safety of blasting operators can be effectively improved.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic diagram of the assembly of a blasthole blocking device for protecting the blasthole lead-out line with the line in a free state according to an embodiment.

Fig. 2 is an exploded schematic view of a blasthole sealing device for protecting the blasthole lead-out line of the embodiment.

Fig. 3 is an exploded schematic view of the blockage casing, the friction pad and the closure cover of the casing in the embodiment.

Fig. 4 is a schematic diagram of the inner shaft of the blockage in the embodiment.

Figure 5 is an internal view of the plug inner shaft inserted into the plug housing in an embodiment.

Fig. 6 is a schematic diagram of the change of the friction pad in the embodiment in the free state of the device.

Fig. 7 is a schematic diagram of the assembly of a blast hole sealing device for protecting the lead wire of the blast hole in the embodiment in the blast hole.

Labels in the figure:

1-1. Blocking shell, 1-2. Friction pad,

2-1. Plug the inner shaft, 2-2. Twist the end cover, 2-21. Through hole,

3-1, shell closing cover, 3-11, through hole, 3-2, leg line,

4 - Gun holes.

Detailed ways

Example

Referring to Fig. 1 and Fig. 2, a kind of blasthole plugging device for protecting the blasthole lead-out line in the illustration is a specific embodiment of the present invention, which specifically includes a plugging shell 1-1, a friction pad 1-2, Block the inner shaft 2-1, the end twist cover 2-2 and the shell closure cover 3-1, wherein the block shell 1-1 and the block inner shaft 2-1 are the main components of the device, and the block shell 1-1 is embedded in the cannon The orifice is an elastic cylindrical shell, the shell section has a circular outer circumference consistent with the size of the blast hole, and the inside is a hollow cavity with a non-circular section; the outer circumference of the section of the blocked inner shaft 2-1 is the hollow cavity of the blocked shell Consistent non-circular cross-section, the inside is the channel for accommodating the lead-out line of the blasthole. The "section" referred to here is the cross-section perpendicular to the axial direction of the blasthole. The plugging inner shaft 2-1 is inserted into the hollow cavity of the plugging shell 1-1 along the axial direction of the blast hole through the matching non-circular cross-section, and the rotating plugging inner shaft 2-1 passes the non-circular section shaft section to plug the plugging shell 1-1 The outer circumference of the cylindrical casing is pressed against the inner wall of the blast hole outward.

The plugging inner shaft 2-1 and the plugging shell 1-1 are clearance fits when their respective non-circular cross-sections match, so as to ensure that the plugging inner shaft 2-1 can be inserted into the plugging shell 1-1 normally, and also make the plugging shell 1 The blockage inner shaft 2-1 in -1 can rotate smoothly. The outer wall of the cylindrical casing of the plugging shell 1-1 in the present embodiment is a circular shape matched with the blasthole, and the circular outer circumference of the plugging shell 1-1 and the inner wall of the blasthole are clearance fit, so that no deformation can occur. The plugging shell 1-1 is smoothly inserted into the gun hole, and the plugging inner shaft 2-1 and the plugging shell 1-1 are inserted and inserted through the non-circular section, and the outer wall of the plugging inner shaft 2-1 and the plugging shell 1-1 1 to maintain contact between the inner walls of the housing.

The plugging shell 1-1 of this embodiment is formed integrally with a hard rubber material with a certain elastic deformation, preferably gutta-percha, and the plugging inner shaft 2-1 is made of a hard material, preferably a hard PC material for injection molding. Rotate the plugging inner shaft 2-1 at a certain angle, and the hard plugging inner shaft 2-1 can squeeze the inner wall of the plugging shell 1-1 through its non-circular cross section, and the plugging shell 1-1 will be squeezed by the extrusion force. Further compress between the outer wall and the inner wall of the blasthole, and complete the sealing and fixing of the blasthole opening in this embodiment. The passage for accommodating the foot line includes the hollow passage of the plugging inner shaft 2-1 and the through holes arranged at the ends of the plugging shell 1-1 and the plugging inner shaft 2-1, and the leg line 3-2 is drawn out from the plugging shell 1-1 in the gun hole. The through hole at the end enters the hollow channel of the blocked inner shaft 2-1, and the blast hole is drawn out from the through hole at the end of the blocked inner shaft 2-1.

Referring to Fig. 3, in a further solution of this embodiment, a friction pad 1-2 is embedded on the outer wall surface of the plugging case 1-1, and the friction pad 1-2 is a hard friction block with a friction coefficient greater than that of the plugging case. As shown in Figure 7, when the plugging inner shaft 2-1 rotates and squeezes the plugging shell 1-1, the squeezing force f1 is applied to the plugging shell 1-1, and the squeezing force f1 applied to the plugging shell 1-1 is transmitted To the friction pad 1-2, forming the pressure that the friction pad 1-2 is pressed against the inner wall of the blast hole, because the friction coefficient of the friction pad is larger, it can provide a greater frictional force for blocking the gun hole in this embodiment .

Considering the elastic limit of the material of the plugging shell 1-1, the extrusion deformation of the plugging inner shaft 2-1 to the plugging shell 1-1 should not be too large. The extrusion deformation of the shell is 2 mm to 6 mm.

In this embodiment, the friction pads 1-2 are arc-shaped blocks matching the outer circumference of the plugging shell 1-1, and two sets of pads are embedded along the circumferential direction of the plugging shell 1-1.

The friction pad 1-2 is embedded in the groove of the outer wall of the blockage shell 1-1, and in the natural state before the blockage inner shaft 2-1 is inserted into the blockage shell 1-1 and rotates, the friction pad 1-2 and the blockage The peripheral outer wall of the casing 1-1 remains flush, so that the plugging of the casing 1-1 into the blast hole will not be affected. The friction pad 1-2 embedded in the blocking shell 1-1 has only one side of the arc end fixedly connected with the blocking shell 1-1, and the other ends are freely embedded in the groove of the blocking shell 1-1, and the side of the blocking shell 1-1 In the free state of not being inserted into the gun hole, the inner shaft 2-1 of the plug is rotated to squeeze the plug shell 1-1 and deform, and the friction pad 1-2 will be pushed out from the groove of the plug shell 1-1 , as shown in Figure 6, which also shows that the friction pad 1-2 is subjected to the extrusion force of the blockage shell 1-1.

Further, the friction pad 1-2 in this embodiment adopts an arc-shaped block with variable thickness, and the thickest part of the modular pad 1-2 corresponds to the non-circular section of the inner shaft 2-1 to block the outer shell 1-1. of maximum deformation.

When the plugging inner shaft 2-1 rotates and acts on the maximum deformation of the plugging shell 1-1, the exerted extrusion force is the largest. This design makes the plugging inner shaft 2-1 correspond to the thinner friction pad 1-2 at the initial stage of rotation. In this way, the blockage inner shaft 2-1 can be smoothly rotated in the presence of the friction pad, and as the blockage inner shaft 2-1 continues to rotate, the thickness of the friction pad corresponding to the extrusion force increases, which makes the blockage inner shaft 2-1 The greater extrusion force on the blockage shell 1-1 acts on the friction pad. The arrangement of the variable-thickness friction pads in this embodiment makes the rotation operation of the plugging inner shaft 2-1 more labor-saving, and at the same time can further increase the pressing force on the friction pads after the plugging inner shaft 2-1 rotates in place.

Referring to Fig. 4 and Fig. 5 together, the inside of the cylindrical shell of the blocking shell 1-1 is a hollow cavity with an elliptical section, and the center of the elliptical section of the cavity is set concentrically with the circular outer circumference of the cylindrical shell of the blocking shell 1-1 The plugging inner shaft 2-1 is an elliptical cross-section hollow shaft section matched with the cylindrical shell of the plugging shell 1-1.

The plugging inner shaft 2-1 adopts an elliptical section, and the elliptical section is concentrically arranged with the center of the plugging shell 1-1. When the plugging inner shaft 2-1 is rotated, the major axis of the elliptical section of the plugging inner shaft 2-1 Each end can form a squeeze on the blocking shell 1-1, so that the blocking shell 1-1 is symmetrically deformed. As shown in Figure 5, a housing wall with a gradually changing thickness is formed between the elliptical hollow cavity that blocks the housing 1-1 and the outer circle of the cylindrical housing. Correspondingly, in this embodiment, a pair of arc crescent-shaped friction Pads 1-2 are used as a group, and the thick ends of a pair of friction pads 1-2 in the same group are arranged close to each other. Pads 1-2 are correspondingly embedded in the variable-thickness shell between the elliptical hollow cavity of the blockage shell 1-1 and the outer circle of the cylindrical shell, so that the thickest position of each group of friction pads 1-2 that are close to each other corresponds to the inside of the blockage. The two ends of the major axis of the elliptical section of the shaft 2-1 are rotated to the maximum deformation of the blocking shell 1-1. This position is the force applied to the friction pad 1-2 by rotating the inner shaft 2-1 to squeeze the rotating shell 1-1. maximum compression force.

Referring to Fig. 5, insert the blockage inner shaft 2-1 into the blockage shell 1-1, and twist the cover by turning the end of the blockage inner shaft 2-1, so that the blockage inner shaft 2-1 with an elliptical cross-section rotates, and with the blockage With the increase of the rotation angle of the inner shaft 2-1, the elliptical shaft section of the blocked inner shaft 2-1 gradually makes the blocked shell 1-1 press against the blast hole wall, and also makes the crescent-shaped friction pad 1 on the blocked shell 1-1 The -2 part is pressed against the wall of the blast hole. When the inner shaft of the plug is rotated by 90°, the normal force of the crescent-shaped friction pad 1-2 reaches the maximum, and the friction force between it and the blast hole also reaches the maximum, and the plug shell 1-1 Can no longer move axially along the borehole.

The plugging inner shaft 2-1 is a hollow shaft section, and the inner hollow cavity is a channel space for accommodating the lead-out line of the blasthole. The twisted end cover 2-2 of the cross-section, the twisted end cover 2-2 is arranged coaxially with the central axis of the ellipse that blocks the inner shaft 2-1, and its circumference diameter is not less than the distance from the major axis of the elliptical section that blocks the inner shaft 2-1 , the terminal twist cover 2-2 is provided with a through hole 2-21 for the foot wire to pass through.

The outer circumference diameter of the terminal twist cover 2-2 in this embodiment is consistent with the circumference outer diameter of the plugging shell 1-1, and the end twisting cover 2-2 is loaded into the inside of the plugging shell 1-1 to the plugging inner shaft 2-1 An axial limit is formed so that they cannot be inserted together to block the inside of the housing 1-1. The end twisting cover 2-2 forms a continuous cylinder with the plugging shell 1-1 after the plugging inner shaft 2-1 is inserted into the plugging shell. There is a protruding handle block on the outer end surface of the twist cover 2-2, which is convenient for turning the end twist cover 2-2 and blocking the inner shaft 2-1. The setting position of the handle block should not block the end twist cover 2 The through hole 2-21 on the -2, the through hole 2-21 provided on the end twist cover 2-2 communicates with the hollow cavity that blocks the inner shaft 2-1.

The outer end of the cylindrical shell of the plugging shell 1-1 is an opening for the insertion of the plugging inner shaft 2-1, and the inner side of the blasting hole is provided with a detachable casing closing cover 3 -1, the shell closure cover 3-1 is provided with a through hole 3-11 for the foot wire to pass through.

The housing closing cover 3-1 can be fastened with the end opening of the blocking housing 1-1 through a bayonet, or fixedly connected with the end opening of the blocking housing 1-1 through thread fit. The shell closure cover 3-1 is provided with a through hole 3-11 for the foot line to pass through, and the through hole 3-11 communicates with the hollow cavity of the block inner shaft 2-1 after the block inner shaft 2-1 is inserted into the block housing .

In this embodiment, the plugging shell 1-1 and the shell closing cover 3-1 are detachable structures, and the through hole on the shell closing cover 3-1 can allow the detonator foot wire and its line card connector to pass through; the plugging inner shaft 2 -1 and the end twist cover 2-2 are integrally formed, and the through hole 2-21 on the end twist cover 2-2 can also allow the detonator foot wire and its line card connector to pass through, so that the shell closure cover 3-1 The through hole 3-11 on the top, the hollow cavity of the blocked inner shaft 2-1, and the through hole 2-21 on the end twist cover 2-2 form the blasthole sealing device to accommodate the blasthole internal detonator leg line and its line. Channel from the card connector.

The present invention also discloses a construction method of the above-mentioned blasthole plugging device, which specifically includes the following steps:

Step 1, determine the diameter of the blast hole to be plugged in the working face, clean up the debris in the blast hole 4, and then select the plugging shell corresponding to the diameter of the blast hole.

Step 2: After charging the blast hole, pass the line card connector and the leg wire through the through hole 3-11 on the shell closure cover 3-1 outside the blast hole, and preliminarily gather the detonator leg wire together.

Step 3, pass the bundled line card connector and foot wire through the plugging shell 1-1 to ensure that there is no twisting and folding of the foot wire in the blasthole. After plugging the shell 1-1, the plugging shell 1-1 is inserted into the blast hole 4.

Step 4, continue to pass the lead-out line card connector and foot wire outside the blast hole 4 through the hollow cavity that blocks the inner shaft 2-1 and the through hole 2-21 of the end twist cover 2-2, and connect the detonator After the foot line, store the excess length of the detonator foot line in the hollow cavity of the inner plug shaft 2-1, insert the inner plug shaft 2-1 into the plug shell 1-1, and at this time plug the inner shaft 2-1 The outer periphery of the cross section is consistent with the hollow cavity of the blocking shell, and the blocking shell 1-1 is in contact with the inner wall of the blast hole 4, and is not locked and blocked.

Step 5, rotate the plugging inner shaft 2-1 by twisting the cover 2-2 at the end, so that the plugging inner shaft 2-1 will press the cylindrical shell of the plugging shell 1-1 and the inner wall of the blast hole 4, and press the plugging shell 1 The friction pads on -1 are pressed against the inner wall of the blast hole 4 together until the plugging shell 1-1 cannot move in the blast hole 4, and the blast hole is fixedly blocked.

In practical application, if the gap between the plugging casing 1-1 and the blast hole is relatively large, it is also possible to not insert the plugging casing 1-1 into the blast hole in step 3, and estimate the position of the lead-out line of the blast hole at the blast hole. According to step 4, the plugging inner shaft 2-1 and the plugging shell 1-1 are assembled outside the blasthole and then inserted into the blasthole together. The detonator footline of the blast hole using the plugging device will not be messy and dragged on the working surface because it is collected and arranged. When the cutting hole or other adjacent blastholes are blasted, it is avoided that the blasting flying stone will damage the detonator footline. The problem of breaking, severing, or even extracting unexploded digital electronic detonators from explosives.

Step 6: Bundle the foot wires drawn from all the blastholes on the working face together, and then fit them together and fix them along the excavation working face. Detonate after the preparations are complete.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", The orientation or positional relationship indicated by "horizontal" is based on the orientation or positional relationship shown in the drawings, and is only for the clarity of the technical solution and the convenience of description, so it should not be understood as a limitation of the present invention.

As used herein, the terms "comprises", "comprises" or any other variation thereof are intended to cover a non-exclusive inclusion of elements other than those listed and also other elements not expressly listed.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present invention, and should cover all Within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A blasthole plugging device for protecting blasthole lead wires, characterized in that: it comprises a plugging shell (1-1) and a plugging inner shaft (2-1); The plugging shell (1-1) is embedded in the gun hole, and has an elastic cylindrical shell. The outer circumference of the cross section of the shell is a circular outer circumference consistent with the size of the gun hole, and the inside is a hollow cavity with a non-circular cross section; The outer circumference of the cross section of the plugging inner shaft (2-1) is a non-circular section consistent with the hollow cavity of the plugging shell, and the inside is a channel for accommodating the lead-out line of the blasthole; the plugging inner shaft (2-1) is along the Axially inserted in the hollow cavity of the plugging shell (1-1), the rotating plugging inner shaft (2-1) connects the cylindrical shell of the plugging shell (1-1) to the inner wall of the blast hole through the non-circular section shaft section Press tight. 2. A blasthole plugging device for protecting blasthole lead-out lines according to claim 1, wherein friction pads (1-2) are embedded on the outer wall surface of the plugging casing (1-1), and the The friction pad (1-2) is a hard friction block whose coefficient of friction is greater than that of the blockage shell. 3. A blasthole plugging device for protecting blasthole lead-out line according to claim 2, said friction pad (1-2) is an arc matched with the casing outer periphery of the plugging casing (1-1) Shaped block, two groups of pads are embedded along the circumferential direction of the plugging shell (1-1). 4. A blasthole plugging device for protecting blasthole lead-out line according to claim 3, the friction pad (1-2) is an arc-shaped block with variable thickness, and the modular pad (1 The thickest part of -2) corresponds to the maximum deformation of the plugging shell (1-1) due to the non-circular section of the plugging inner shaft (2-1). 5. A kind of blasthole plugging device for protecting the blasthole lead-out line according to claim 1, the hollow cavity of the cylindrical casing of the plugging shell (1-1) is an elliptical section, and the center of the elliptical section is It is arranged concentrically with the circular outer circumference of the cylindrical housing of the plugging shell (1-1), and the plugging inner shaft (2-1) has an elliptical cross-sectional shaft section matching it. 6. A blasthole plugging device for protecting blasthole lead-out lines according to claim 5, the inner hollow cavity of the plugging inner shaft (2-1) is open near the inner side of the blasthole, and is close to the outside of the blasthole The other end is provided with a terminal twist cover (2-2) with a circular section, and the terminal twist cover (2-2) is coaxially arranged with the ellipse center axis of the blocked inner shaft (2-1), and its circumference The diameter is not less than the major axis distance of the elliptical cross-section that blocks the inner shaft (2-1), and the end twist cover (2-2) is provided with a through hole for the leg line to pass through. 7. A blasthole plugging device for protecting blasthole lead-out line according to claim 1, the cylindrical casing of the plugging shell (1-1) is near the blasthole outer side end for plugging inner shaft (2 -1) The opening for insertion is provided with a detachable shell closing cover (3-1) near the inner side of the blast hole, and the shell closing cover (3-1) is provided with a through hole for the foot wire to pass through. 8. A blasthole plugging device for protecting blasthole lead-out line according to claim 1, the plugging shell (1-1) is made of gutta-percha material, and the plugging inner shaft (2-1) Using hard PC material. 9. A blasthole plugging device for protecting blasthole lead-out line according to claim 1, the amount of extrusion deformation of the non-circular section shaft section of the plugging inner shaft (2-1) to the plugging shell is 2mm ~6mm. 10. The construction method of any one blasthole plugging device in claim 1-9, it is characterized in that comprising the steps: Step 1: Determine the diameter of the blasthole to be plugged in the working face, clean up the debris in the blasthole, and then select the plugging shell corresponding to the diameter of the blasthole; Step 2, after charging the blast hole, pass the line card connector and the foot wire through the through hole on the casing closure cover (3-1) outside the blast hole, and preliminarily gather the detonator leg wire; Step 3, pass the cable card connector and the foot wire through the blocking shell (1-1), make sure that the foot wire in the blast hole is not twisted and folded, and when the foot wire is straightened properly, cover the shell with the cover (3-1) After reaching the plugging shell (1-1), insert the plugging shell (1-1) into the gun hole; Step 4, continue to pass the lead-out line card connector and foot wire outside the blast hole through the hollow cavity of the blocked inner shaft (2-1) and the through hole of the end twist cover (2-2), and connect the detonator After the foot line, store the excess length of the detonator foot line into the hollow cavity of the plugging inner shaft (2-1), insert the plugging inner shaft (2-1) into the plugging shell (1-1), at this time the plugging The outer circumference of the cross-section of the inner shaft (2-1) is consistent with the hollow cavity of the blocking shell; Step five, rotate the plugging inner shaft (2-1) through the end twisting cover (2-2), so that the plugging inner shaft (2-1) presses the cylindrical shell of the plugging shell (1-1) against the inner wall of the blast hole Tighten, and press the friction pads on the plugging shell (1-1) to the inner wall of the blast hole together until the plugging shell (1-1) is fixed and blocked at the blast hole; Step 6: Bundle the feet drawn from all the blastholes on the working face together, place them together along the excavation working face after sorting out, and detonate after the preparation work in the blasting area is completed.