CN109989752A - An internal injection type static crushing coal seam surrounding rock pressure relief device - Google Patents

Abstract

The invention discloses an internal injection type static crushing coal seam surrounding rock pressure relief device, comprising a static crushing pressure relief mechanism and a sealing anchor block for plugging a borehole. The pressure unit, the static crushing pressure relief unit includes a pipe body, a pipe head clamp and a pipe tail clamp. The pipe head clamp is provided with a pipe head outer convex part, and the pipe end clamp is provided with a pipe tail inner concave part. A grouting pipe and a threaded hole are arranged on the outer convex part of the pipe head or the inner concave part of the pipe tail, and a one-way valve is arranged in the grouting pipe, and the static crushing and expanding slurry flows into the pipe body through the grouting pump and the one-way valve. , the threaded hole is matched with the screw thread. The static crushing and pressure-relief unit of the present invention wraps the static crushing and expanding slurry inside, so as to realize that the static crushing and expanding slurry does not flow back, do not run off, and do not leak slurry in the inclined or vertically upward drilling holes of the coal rock. The gradual expansion of the volume will crack the surrounding rock of the coal seam, which is slow and durable and environmentally friendly.

Description

An internal injection type static crushing coal seam surrounding rock pressure relief device

technical field

The invention belongs to the technical field of coal seam surrounding rock pressure relief, and particularly relates to an internal injection type static crushing coal seam surrounding rock pressure relief device.

Background technique

The existing rock breaking methods in mines mainly use explosive blasting to crack the surrounding rock and use explosive blasting to achieve pressure relief in the concentrated stress area of the coal and rock mass. This method is very dangerous, especially for high gas mines. Hidden safety hazards, the use of explosives blasting in mines is dangerous for rock-breaking operations, prone to personnel safety accidents, and even major accidents of gas explosion. The use of explosives to blast rock and relieve pressure requires personnel to evacuate, affecting other processes at the same time, reducing the mine In addition, when explosives are used for pressure relief in the stress concentration area of coal and rock mass, the disturbance to the surrounding rock of the mining face is relatively severe but short-lived. , especially the approval process of mine explosives is very complicated, which hinders the development of mine explosive rock breaking and pressure relief methods; static crushing agent is a commonly used building material material, which is non-polluting and noise-free in use, and does not belong to flammable, Explosive materials do not produce vibration, noise, flying stones, dust and toxic gas when reacting in the pores of rocks and coal bodies. They are pollution-free and environmentally friendly products that are green and environmentally friendly. After they are fully stirred with water, they will undergo a hydration reaction of 3~ The huge expansion force generated by 5 times the volume expansion can crack the rock mass. However, the rock mass in the quarry is hard, and the static crushing agent in the borehole does not need to consider the backflow, running and leakage of the slurry. Compared with the rock mass conditions of the quarry, the surrounding rock of the mining face of the underground coal seam is complex. When cracking the roof, it is necessary to consider preventing the backflow and plugging of the slurry, and for the situation where the roof rock contains cracks It is also necessary to consider the problems of slurry running and slurry leakage.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an internal injection type static crushing coal seam surrounding rock pressure relief device, which is novel and reasonable in design, and uses the static crushing pressure relief unit to wrap the static crushing expansion slurry in the Inside, it realizes that the static crushing and expanding slurry does not flow backward in the inclined or vertically upward drilling holes of the coal rock, and does not escape or leak the slurry in the coal-rock fissures. The volume of the static crushing and expanding slurry is gradually expanded to expand and crack the surrounding rock , Slow and durable, green and environmentally friendly, avoid the use of detonators and explosives to pollute the groundwater, and facilitate popularization and use.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is: an internal injection type static crushing coal seam surrounding rock pressure relief device, which is characterized in that it includes a static crushing pressure relief device arranged in a pre-drilled hole in the coal seam surrounding rock A mechanism and a hole sealing anchor block for sealing the static crushing and pressure relief mechanism in the borehole, the static crushing and pressure relief mechanism includes a plurality of static crushing and pressure relief units connected end to end in sequence, the static crushing and pressure relief The unit includes a circular pipe body, a pipe head clamp arranged at the head end of the pipe body, and a pipe tail clamp disposed at the end of the pipe body, the pipe head clamp and the pipe tail clamp are both. It is a ring-shaped clamp, the inner diameter of the pipe head clamp is equal to the inner diameter of the pipe body, the outer diameter of the pipe head clamp is smaller than the outer diameter of the pipe body, and the inner diameter of the pipe end clamp is equal to the diameter of the pipe head clamp. Outer diameter, the outer diameter of the pipe end clamp is equal to the outer diameter of the pipe body, the end of the pipe head clamp away from the pipe body is provided with a pipe head protruding part, and the end of the pipe end clamp close to the pipe body is provided with the pipe head. The inner concave part of the tube tail which is matched with the outer convex part of the head and extends into the tube body, and the inner side wall of the tube tail clamp is provided with a tube head clamp in the next static crushing and pressure relief unit to cooperate and protrude To the anti-skid structure outside the pipe, the outer convex part of the pipe head or the inner concave part of the pipe tail is provided with a grouting pipe that communicates with the pipe body, and a one-way valve is arranged in the grouting pipe. The one-way valve flows into the pipe body, the outer convex part of the pipe head or the inner concave part of the pipe tail is provided with a threaded hole for exhausting, and the threaded hole is matched with the screw thread.

The above-mentioned internal injection type static crushing coal seam surrounding rock pressure relief device is characterized in that: the length of the sealing and anchoring block along the length of the borehole is not less than 1 m; the sealing and anchoring block is a resin anchoring agent, and the The resin anchoring agent is evenly inserted into the drilled hole through the bolt drilling machine.

The above-mentioned internal injection type static crushing coal seam surrounding rock pressure relief device is characterized in that: the anti-skid structure is a plurality of uniformly arranged on the inner side wall of the pipe end clamp along the circumferential direction of the inner side wall of the pipe end clamp. Wires, the number of wires in an anti-skid structure is at least three.

The above-mentioned internal injection type static crushing coal seam surrounding rock pressure relief device is characterized in that: the included angle between the central axis in the longitudinal direction of the borehole and the horizontal plane is 0° to 90°.

The above-mentioned internal injection type static crushing coal seam surrounding rock pressure relief device is characterized in that: the static crushing expansion slurry is composed of water and static crushing agent, and the mass ratio of water and static crushing agent is 1:3.

The above-mentioned internal injection type static crushing coal seam surrounding rock pressure relief device is characterized in that: the pipe body is a rubber pipe body, a hard plastic pipe body, a waterproof corrugated paper pipe body or a waterproof kraft paper pipe body.

The above-mentioned internal injection type static crushing coal seam surrounding rock pressure relief device is characterized in that: the outer convex part of the pipe head is a conical outer convex part, and the large diameter end of the circular conical convex part is fastened to the pipe head The inner concave part of the tube tail is a concave concave part, the large diameter end of the conical concave part and the end of the tube tail clamping part close to the pipe body, the concave concave part of the conical shape The small diameter end extends into the tube body;

Both the pipe head clamp and the pipe end clamp are steel rings.

The above-mentioned internal injection type static crushing coal seam surrounding rock pressure relief device is characterized in that: the grouting pipe is arranged in the circular cone-shaped convex part, and one end of the grouting pipe is connected to the circular cone-shaped convex part. The end face of the small diameter end of the grouting pipe is flush, the other end of the grouting pipe extends into the conical convex part and communicates with the pipe body, and the threaded hole is arranged in the conical convex part and located in the grouting On the side of the pipe, the threaded hole is communicated with the pipe body, and the circular concave concave piece is a closed conical concave concave piece.

The above-mentioned internal injection type static crushing coal seam surrounding rock pressure relief device is characterized in that: the grouting pipe is arranged in the circular cone-shaped convex part, and one end of the grouting pipe is connected to the circular cone-shaped convex part. The end face of the small diameter end of the grouting pipe is flush, the other end of the grouting pipe extends into the conical outer convex part and communicates with the pipe body, and the threaded hole is arranged on the end face of the small diameter end of the conical concave concave part and is connected to the pipe. body connectivity.

The above-mentioned internal injection type static crushing coal seam surrounding rock pressure relief device is characterized in that: the grouting pipe is arranged on the end face of the small diameter end of the circular concave inner concave piece, and one end of the grouting pipe is connected to the circular cone. The end face of the small-diameter end of the truncated convex piece is flush, the other end of the grouting pipe extends into the pipe body, and the threaded hole is arranged on the end face of the small-diameter end of the conical convex piece and communicates with the pipe body.

Compared with the prior art, the present invention has the following advantages:

1. The present invention adapts to the needs of drilling holes of different lengths through the cooperation of a plurality of static crushing and pressure-relief units connected end to end in sequence, and is provided on the outer convex parts of the pipe head or the inner concave parts of the pipe end at both ends of the pipe body for installation. The grouting pipe of the one-way valve and the threaded hole for exhausting can realize the one-way inflow of the static crushing and expanding slurry, avoid the backflow of the static crushing and expanding slurry, and set up a non-slip structure to connect two adjacent static crushing pressure relief units. Avoid the static crushing pressure relief unit slipping out of the hole due to its own weight, and the use effect is good.

2. The present invention expands and cracks the surrounding rock of the coal seam by gradually expanding the volume of the static crushing and expanding slurry, without the need for the shutdown of the underground coal seam construction, without the need for personnel to evacuate, and the fracturing of the surrounding rock of the coal seam and the mining operation are carried out at the same time, without affecting other processes. The operation efficiency of the mine is improved, the safety factor of the mine is greatly improved, and the operation is simple, which is convenient for popularization and use.

3. In the present invention, the static crushing and expanding slurry is wrapped in the interior by using the static crushing and pressure-relief unit. Since the mine rock-breaking and stress-concentration zone pressure-relief position is usually on the roof, for the coal-rock inclined or vertical upward drilling, use The method of wrapping the static crushing and expanding slurry realizes that the static crushing and expanding slurry does not flow back, does not run away and does not leak. Long-lasting, slow, and large enough expansion force can promote the gradual release of the energy accumulated in the surrounding rock of the coal seam mining face, avoiding the rapid accumulation of energy again after pressure relief in the stress concentration area, green and environmental protection, safe, reliable and stable, avoiding the use of detonators and explosives to groundwater. The cost is much lower than the cost of dangerous pyrotechnics such as explosives, and the cost of rock breaking and pressure relief in the mine is saved.

4. The design of the present invention is novel and reasonable. The static crushing and pressure relief unit wraps the static crushing and expanding slurry inside it to relieve pressure of the surrounding rock and adapt to the surrounding rock crushing environment of various conditions, and has strong applicability. The pipe body can be made of rubber. , hard plastic tube body, waterproof corrugated paper tube body or waterproof kraft paper tube body, green, environmentally friendly and low cost.

In summary, the design of the present invention is novel and reasonable, and the static crushing and expanding slurry is wrapped in the interior of the static crushing and pressure-relief unit, so that the static crushing and expanding slurry does not flow back in the coal-rock inclined or vertically upward drilling hole, and the static crushing and expanding slurry is There is no slurry running and no leakage in the fissure. The volume of the static crushing and expanding slurry is gradually expanded to expand the surrounding rock of the coal seam, which is slow and durable, and is environmentally friendly.

The technical solutions of the present invention will be further described in detail below through the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a use state diagram of the present invention.

FIG. 2 is another use state diagram of the present invention.

FIG. 3 is a first structural schematic diagram of the static crushing and pressure relief unit of the present invention.

FIG. 4 is a schematic diagram of the second structure of the static crushing and pressure relief unit of the present invention.

Fig. 5 is a schematic diagram of the third structure of the static crushing and pressure relief unit of the present invention.

FIG. 6 is a schematic diagram of the connection relationship between two static crushing and pressure relief units of the first structure or two of the second structure of the present invention.

7 is a schematic diagram of the connection relationship between two static crushing and pressure relief units of the third structure of the present invention.

Explanation of reference numbers:

1—pipe body; 2—pipe head clamp; 3—pipe end clamp;

4—The outer convex part of the pipe head; 5—The inner concave part of the pipe end; 6—The one-way valve;

7—threaded hole; 8—anti-skid structure; 9—drilled hole;

10—Coal seam surrounding rock.

Detailed ways

As shown in FIG. 1 to FIG. 7 , the present invention includes a static crushing and pressure-relief mechanism arranged in a pre-drilled borehole 9 in the surrounding rock 10 of the coal seam, and a static crushing and pressure-relief mechanism for sealing the static crushing and pressure-relief mechanism in the borehole 9 The hole sealing anchor block, the static crushing and pressure relief mechanism includes a plurality of static crushing and pressure relief units connected end to end in sequence, and the static crushing and pressure relief unit includes a circular pipe body 1 and a pipe head end of the pipe body 1. The pipe head clamp 2 and the pipe end clamp 3 arranged at the end of the pipe body 1, the pipe head clamp 2 and the pipe end clamp 3 are annular clamps, and the pipe head clamp The inner diameter of the clamp 2 is equal to the inner diameter of the pipe body 1, the outer diameter of the pipe head clamp 2 is smaller than the outer diameter of the pipe body 1, the inner diameter of the pipe end clamp 3 is equal to the outer diameter of the pipe head clamp 2, and the pipe end clamp The outer diameter of the clamp 3 is equal to the outer diameter of the pipe body 1, the end of the pipe head clamp 2 away from the pipe body 1 is provided with a pipe head protruding part 4, and the end of the pipe end clamp 3 close to the pipe body 1 is provided with a The inner concave part 5 of the pipe tail which cooperates with the outer convex part 4 of the pipe head and extends into the pipe body 1; The anti-skid structure 8 is fitted with the clamp 2 and protrudes out of the pipe body 1. The outer convex part 4 of the pipe head or the inner concave part 5 of the pipe tail is provided with a grouting pipe that communicates with the pipe body 1. The grouting pipe is provided with There is a one-way valve 6, the static crushing and expanding slurry flows into the pipe body 1 through the grouting pump and the one-way valve 6, and the outer convex part 4 of the pipe head or the inner concave part 5 of the pipe tail is provided with a threaded hole 7 for exhausting, The threaded hole 7 is threaded with the screw.

It should be noted that the inner diameter of the pipe head clamp 2 is equal to the inner diameter of the pipe body 1, the outer diameter of the pipe head clamp 2 is smaller than the outer diameter of the pipe body 1, and the inner diameter of the pipe end clamp 3 is equal to the pipe head clamp The purpose of the outer diameter of the piece 2 is to facilitate the docking of two adjacent static crushing and pressure-relief units, and to ensure that the static crushing and pressure-relief mechanism composed of multiple static crushing and pressure-relief units connected end to end forms a cylinder with a straight outer diameter, which is convenient for Cooperate with the borehole 9, through the cooperation of a plurality of static crushing and pressure relief units connected end to end in sequence, to meet the needs of boreholes of different lengths. The grouting pipe for installing the one-way valve 6 and the threaded hole 7 for exhausting are arranged on it, so as to realize the one-way inflow of the static crushing and expanding slurry, avoid the backflow of the static crushing and expanding slurry, and set the anti-skid structure 8 to connect the adjacent ones. Two static crushing and pressure-relief units prevent the static crushing and pressure-relief unit from sliding out of the borehole due to its own weight; by using the static crushing and expanding slurry volume to expand gradually, the surrounding rock of the coal seam is expanded and fractured, without the need for downtime for underground coal seam construction, without the need for personnel to evacuate, and the coal seam The fracturing of the surrounding rock and the mining operation are carried out at the same time, without affecting other processes at the same time, which improves the operation efficiency of the mine, greatly improves the safety factor of the mine, and is easy to operate; the static crushing and pressure relief unit is used to wrap the static crushing expansion slurry in the mine. Inside, because the mine rock breaking and stress concentration area pressure relief position is usually on the roof, for the inclined or vertical upward drilling of the coal rock, the static crushing and expanding slurry is wrapped to realize that the static crushing and expanding slurry does not flow back or run away. Slurry and non-leakage slurry, the huge expansion force generated by the volume expansion of static crushing and expanding slurry is used to swell the surrounding rock of the coal seam, and the disturbance to the surrounding rock of the coal seam mining face is lasting and slow, and a large enough swelling force can promote the coal seam mining face. The energy is gradually released to avoid the rapid accumulation of energy again after the stress concentration area is relieved. It is green and environmentally friendly, safe, reliable and stable. It avoids the use of detonators and explosives to pollute the groundwater. , which saves the cost of rock breaking and pressure relief in the mine; the static crushing and pressure relief unit wraps the static crushing and expanding slurry inside it to relieve pressure on the surrounding rock and adapt to the surrounding rock crushing environment of various conditions. It adopts rubber tube body, hard plastic tube body, waterproof corrugated paper tube body or waterproof kraft paper tube body, which is green, environmentally friendly and low cost.

In this embodiment, the length of the sealing and anchoring block along the length direction of the borehole 9 is not less than 1 m; the sealing and anchoring block is a resin anchoring agent, and the resin anchoring agent is uniformly inserted into the drilling hole 9 by the bolt drill. Inside.

It should be noted that the purpose of the length of the plugging anchor block along the length of the borehole 9 is not less than 1m to prevent the static crushing and pressure relief mechanism from being blocked too shallowly, resulting in the phenomenon of spray holes during the hydration reaction of the static crushing expansion slurry. security incident.

In this embodiment, the anti-skid structure 8 is a plurality of metal wires uniformly arranged on the inner side wall of the pipe end clamp 3 along the circumference of the inner side wall of the pipe end clamp 3 . The number is at least three.

It should be noted that the anti-skid structure 8 is a plurality of metal wires uniformly arranged on the inner side wall of the pipe end clamp 3 along the inner side wall of the pipe end clamp 3, so as to realize the connection between the pipe end clamp 3 and the next one. The pipe head clamps 2 in the static crushing and pressure relief unit are matched, and the pipe head clamps 2 in the next static crushing and pressure relief unit are inserted into the pipe end clamps 3, and a plurality of metal wires are interposed between the pipes. Between the head clamp 2 and the pipe end clamp 3, the pipe head clamp 2 and the pipe end clamp 3 are evenly squeezed and compacted to prevent the static crushing and pressure relief unit from sliding out of the drilled hole due to its own weight.

In this embodiment, the angle between the central axis of the borehole 9 in the longitudinal direction and the horizontal plane is 0°˜90°.

It should be noted that, as shown in FIG. 1 , the angle between the central axis of the borehole 9 in the longitudinal direction and the horizontal plane is between 0° and 90°, and the static crushing and pressure relief mechanism is inserted into the borehole 9 obliquely from bottom to top; As shown in Figure 2, the angle between the central axis of the borehole 9 in the length direction and the horizontal plane is 90°, and the static crushing and pressure relief mechanism is vertically inserted into the borehole 9 from bottom to top. The static crushing and pressure relief mechanism is suitable for various drills. Hole 9 angle.

In this embodiment, the static crushing and swelling slurry is composed of water and static crushing agent, and the mass ratio of water and static crushing agent is 1:3.

In this embodiment, the pipe body 1 is a rubber pipe body, a hard plastic pipe body, a waterproof corrugated paper pipe body or a waterproof kraft paper pipe body.

It should be noted that the rubber tube body is soft and has excellent airtightness, which can prevent the outflow of static crushing and expanding slurry, and has excellent expansion properties, so that the static crushing agent expands with the volume of the static crushing agent when it expands. It will not burst, and can transmit the expansion force better; in addition, the rubber has good wear resistance, and will not be broken due to the roughness of the hole wall during the process of inserting the static crushing and pressure relief mechanism into the borehole 9. Avoid the outflow of static crushing expansion slurry, suitable for hard rock coal seams;

The hard plastic pipe body, waterproof corrugated paper pipe body or waterproof kraft paper pipe body has a hardness and is easy to be stretched, which can better transmit the expansion force, and is suitable for both hard rock coal seams and soft rock coal seams.

In this embodiment, the pipe head outer convex part 4 is a circular conical convex part, the large diameter end of the circular conical convex part is connected with the end of the pipe head clamping part 2 away from the pipe body 1, and the pipe tail is concave inside. Part 5 is a conical concave part, the large diameter end of the concave concave part and the end of the tube end clamp 3 close to the pipe body 1, the small diameter end of the conical concave part extends into the pipe body 1 Inside;

Both the pipe head clamp 2 and the pipe end clamp 3 are steel rings.

It should be noted that the purpose of the outer convex part 4 of the pipe head being a conical convex part and the concave part 5 of the pipe tail being a concave concave part is to facilitate the installation of the grouting pipe, the pipe head clamp 2 and the pipe tail clamp. The tightening parts 3 are steel rings, which can fasten and connect the adjacent pipe bodies 1 and the matching outer convex part 4 of the pipe head and the inner concave part 5 of the pipe tail as a whole to prevent the seepage of the statically broken and expanded slurry.

In this embodiment, the grouting pipe is arranged in the conical outer convex part, one end of the grouting pipe is flush with the end face of the small diameter end of the conical convex convex part, and the other end of the grouting pipe The threaded hole 7 is arranged in the circular truncated convex part and is located beside the grouting pipe, and the threaded hole 7 is communicated with the pipe body 1. The truncated concave piece is a closed truncated truncated concave piece.

As shown in Fig. 3, in actual use, one end of the grouting pipe is flush with the end face of the small diameter end of the conical outer convex part, and the other end of the grouting pipe extends into the conical convex part And the purpose of communicating with the pipe body 1 is to prevent the grouting pipe from protruding out of the conical convex part, reducing the volume of the static crushing and pressure relief unit, and at the same time, it is convenient to cooperate with another static crushing and pressure relief unit. The threaded hole 7 is arranged on the circular table. The grouting pipe and the threaded hole 7 are arranged on the conical convex part and are located on the side of the grouting pipe. When grouting in 1, there will inevitably be excess gas, and it is necessary to discharge the gas in the pipe body 1. During grouting, keep the threaded hole 7 inclined upward to facilitate the discharge of gas. Therefore, the static crushing and unloading of this structure is adopted. When the unit is pressed, grouting is performed from the side of the circular truncated convex part into the pipe body 1, the circular truncated convex part is inclined upward, and the threaded hole 7 is kept inclined upward. When the grouting amount of the body 1 is consistent with the grouting amount of the threaded hole 7, it means that the grouting of the pipe body 1 is full, and the threaded hole 7 is sealed with a screw.

In this embodiment, the grouting pipe is arranged in the conical outer convex part, one end of the grouting pipe is flush with the end face of the small diameter end of the conical convex convex part, and the other end of the grouting pipe The threaded hole 7 is arranged on the end face of the small diameter end of the conical concave member and communicates with the pipe body 1 , extending into the conical outer convex member and communicating with the pipe body 1 .

As shown in FIG. 4 , in actual use, the grouting pipe is set in the conical outer convex part, and the threaded hole 7 is set on the end face of the small diameter end of the conical concave part and communicated with the pipe body 1 to avoid When the threaded hole 7 and the grouting pipe are arranged on the truncated convex part, the threaded hole 7 occupies the installation position of the grouting pipe. It should be noted that when grouting into the pipe body 1, there will inevitably be excess gas. , it is necessary to discharge the gas in the pipe body 1. When grouting, keep the threaded hole 7 inclined upward to facilitate the discharge of gas. Therefore, when the static crushing and pressure relief unit of this structure is adopted, the circular frustum-shaped convex part is lateral to the pipe body. 1. Grouting inside, the circular truncated convex part is inclined downward, then the circular truncated inner concave part is inclined upward, and the threaded hole 7 is kept inclined upward. When the grouting amount of the pipe body 1 is the same as that of the threaded hole 7, It means that the pipe body 1 is full of grouting, and the threaded hole 7 is sealed with a screw.

In this embodiment, the grouting pipe is arranged on the end face of the small diameter end of the conical concave inner part, and one end of the grouting pipe is flush with the end face of the small diameter end of the conical outer convex part, and the grouting pipe The other end extends into the pipe body 1 , and the threaded hole 7 is provided on the end surface of the small diameter end of the conical outer convex member and communicates with the pipe body 1 .

As shown in Figure 5, in actual use, when grouting into the pipe body 1, there will inevitably be excess gas, and the gas in the pipe body 1 needs to be discharged. Therefore, when the static crushing and pressure relief unit of this structure is adopted, grouting is carried out from the concave concave part of the conical shape into the pipe body 1, the concave concave part of the conical concave part is inclined downward, and the convex part of the conical conical shape is inclined upward, Then the threaded hole 7 remains inclined upward. When the grouting amount of the pipe body 1 is consistent with the slurry discharge amount of the threaded hole 7, it means that the grouting of the pipe body 1 is full, and the threaded hole 7 is sealed with a screw.

When the present invention is used, the number of static crushing and pressure-relieving units is determined according to the length of the borehole 9, the static crushing and expanding slurry is configured, and a plurality of grouting pumps are used to inject static crushing into the pipe bodies 1 of the plurality of static crushing and pressure-relieving units respectively. Expansion slurry, static crushing expansion slurry flows into the pipe body 1 through the grouting pump and the one-way valve 6, and the gas in the pipe body 1 is exhausted through the threaded hole 7. When the pipe body 1 is full of grouting, the screw is used to seal the thread In hole 7, a plurality of static crushing and pressure-relief units filled with static crushing and expanding slurry are sequentially connected to the ends, inserted into hole 9, and the hole 9 is blocked by sealing and anchoring blocks, and the expansion of static crushing and expanding slurry is carried out slowly. The huge expansion force generated by the volume expansion of the static crushing and expanding slurry will swell the surrounding rock of the coal seam, and disturb the surrounding rock of the coal seam mining face for a long time and slowly. A large enough swelling force can promote the gradual release of the energy accumulated in the surrounding rock of the coal seam mining face and avoid stress. After the pressure is relieved in the concentrated area, the energy is quickly accumulated again, and the use effect is good.

The above are only preferred embodiments of the present invention and do not limit the present invention. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technology of the present invention. within the scope of the program.

Claims (10)

1. a kind of internal-injection type static crushing coal seam country rock pressure relief device, it is characterised in that: including being arranged in coal seam country rock (10) The static crushing pressure relief means thereon in drilling (9) drilled in advance and for static crushing pressure relief means thereon closure to drill (9) the sealing of hole anchor block in, the static crushing pressure relief means thereon include multiple static crushing pressure relief units being sequentially connected end to end, The static crushing pressure relief unit includes the tube head banding part (2) of circular tube body (1) and setting in tube body (1) tube head end With setting in the tight part of tube tail hoop (3) of tube body (1) pipe tail end, tube head banding part (2) and the tight part of tube tail hoop (3) are circular ring shape Banding part, the internal diameter of tube head banding part (2) are equal to the internal diameter of tube body (1), and the outer diameter of tube head banding part (2) is less than tube body (1) Outer diameter, the internal diameter of the tight part of tube tail hoop (3) are equal to the outer diameter of tube head banding part (2), and the outer diameter of the tight part of tube tail hoop (3) is equal to tube body (1) outer diameter, tube head banding part (2) are provided with the outer male member (4) of tube head far from the one end of tube body (1), and the tight part of tube tail hoop (3) is close One end of tube body (1), which is provided with, to be cooperated with male member outside tube head (4) and stretches to female members (5), tube tail hoop in the pipe tail in tube body (1) It is provided on the inner sidewall of tight part (3) and cooperates and stretch with the tube head banding part (2) in next static crushing pressure relief unit Anti-skid structure (8) to tube body (1) outside out is provided in the outer male member (4) of tube head or pipe tail in female members (5) and is connected to tube body (1) Grouting Pipe, be provided with check valve (6) in the Grouting Pipe, static crushing dilatant slurry is flowed by grouting pump and check valve (6) Enter in tube body (1), is provided with the threaded hole (7) for exhaust, threaded hole in the outer male member (4) of tube head or pipe tail in female members (5) (7) cooperate with screw thread.

2. a kind of internal-injection type static crushing coal seam described in accordance with the claim 1 country rock pressure relief device, it is characterised in that: the envelope Hole anchor block is not less than 1m along the length of drilling (9) length direction；The sealing of hole anchor block is resin anchoring agent, the resin anchor Gu agent is uniformly filled in drilling (9) by jumbolter.

3. a kind of internal-injection type static crushing coal seam described in accordance with the claim 1 country rock pressure relief device, it is characterised in that: described anti- Slipped Clove Hitch structure (8) is multiple gold on the inner sidewall that the tight part of tube tail hoop (3) inner sidewall is circumferentially uniformly arranged on the tight part of tube tail hoop (3) Belong to silk, the quantity of the wire in an anti-skid structure (8) is at least three.

4. a kind of internal-injection type static crushing coal seam described in accordance with the claim 1 country rock pressure relief device, it is characterised in that: the brill The central axes of hole (9) length direction and the angle of horizontal plane are 0 °~90 °.

5. a kind of internal-injection type static crushing coal seam described in accordance with the claim 1 country rock pressure relief device, it is characterised in that: described quiet The broken dilatant slurry of state is made of water and static breaking agent and the mass ratio of water and static breaking agent is 1:3.

6. a kind of internal-injection type static crushing coal seam described in accordance with the claim 1 country rock pressure relief device, it is characterised in that: the pipe Body (1) is rubber tube body, duroplasts tube body, waterproof tube of corrugated paper body or waterproof kraft paper tube body.

7. a kind of internal-injection type static crushing coal seam described in accordance with the claim 1 country rock pressure relief device, it is characterised in that: the pipe The outer male member (4) of head is round table-like outer male member, and the bigger diameter end and tube head banding part (2) of the round table-like outer male member are far from tube body (1) One end connection, female members (5) is round table-like interior female members, the bigger diameter end and the tight part of tube tail hoop of the round table-like interior female members in pipe tail (3) close to the one end of tube body (1), the miner diameter end of the round table-like interior female members is stretched in tube body (1)；

Tube head banding part (2) and the tight part of tube tail hoop (3) are steel ring.

8. a kind of internal-injection type static crushing coal seam country rock pressure relief device according to claim 7, it is characterised in that: the note It starches pipe to be arranged in the round table-like outer male member, the end face of one end of the Grouting Pipe and the round table-like outer male member miner diameter end is flat Together, the other end of the Grouting Pipe is stretched in the round table-like outer male member and is connected to tube body (1), and threaded hole (7) setting exists In the round table-like outer male member and it is located at the Grouting Pipe side, threaded hole (7) is connected to tube body (1), the round table-like indent Part is closed round table-like interior female members.

9. a kind of internal-injection type static crushing coal seam country rock pressure relief device according to claim 7, it is characterised in that: the note It starches pipe to be arranged in the round table-like outer male member, the end face of one end of the Grouting Pipe and the round table-like outer male member miner diameter end is flat Together, the other end of the Grouting Pipe is stretched in the round table-like outer male member and is connected to tube body (1), and threaded hole (7) setting exists It is connected on the end face of the round table-like interior female members miner diameter end and with tube body (1).

10. a kind of internal-injection type static crushing coal seam country rock pressure relief device according to claim 7, it is characterised in that: described Grouting Pipe is arranged on the end face of the round table-like interior female members miner diameter end, one end of the Grouting Pipe and the round table-like outer male member The end face of miner diameter end is concordant, and the other end of the Grouting Pipe stretches in tube body (1), and threaded hole (7) is arranged described round table-like It is connected on the end face of outer male member miner diameter end and with tube body (1).