CN210422560U

CN210422560U - Mining slip casting hole packer

Info

Publication number: CN210422560U
Application number: CN201921035416.1U
Authority: CN
Inventors: 刘保春; 廉鹏
Original assignee: Hebi Tengda Mining Industry Co Ltd
Current assignee: Hebi Tengda Mining Industry Co Ltd
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2020-04-28
Anticipated expiration: 2029-07-04

Abstract

The utility model discloses a mining slip casting hole packer, the problem of solution is that the shutoff of gas drilling is closely knit inadequately when present gas drainage, and when the slip casting was about to the end, the opportunity of stopping the slip casting was not judged well. The utility model comprises an annular cloth bag, a grouting pipe and a water vapor discharge pipe; the annular cloth bag comprises a front cloth bag and a plurality of rear cloth bags, a water and gas discharge pipe penetrates through the front cloth bag and then extends to a position between the front cloth bag and the first rear cloth bag, and a grouting pipe penetrates through the front cloth bag and then sequentially penetrates through the rear cloth bags; the two ends of the front cloth bag are fixedly bound on the grouting pipe and the water and gas discharge pipe; two ends of the rear cloth bag are fixedly bound on the grouting pipe. Adopt above-mentioned technical scheme the utility model discloses the aqueous vapor delivery pipe's setting is convenient for in time discharge away the aqueous vapor that produces in slip casting and the mud solidification process, prevents that air or moisture from condensing in cement, influences the closely knit nature of gas drilling shutoff.

Description

Mining slip casting hole packer

Technical Field

The utility model relates to a mining equipment field, mining slip casting hole packer when concretely relates to gas drainage.

Background

In the coal mining process, the problem of gas outburst in the coal seam is a great potential safety hazard in coal mining, some mines are forced to be closed, and gas becomes a current restriction factor which causes serious coal production in the future and is one of the main bottlenecks of coal development. The key of gas extraction lies in hole sealing, which is clearly specified in the regulations for preventing coal and gas outburst, and the pre-gas extraction drill hole sealing is strict.

In the prior art, no matter what kind of material is adopted for hole sealing, for example, when cement mortar is used for hole sealing, a hole sealing device adopted during gas extraction brings certain air or has a slightly large water content when hole sealing material is injected, so that cement is slowly condensed and is easy to shrink and separate out water, the sealing performance is poor, the plugging of a gas drilling hole is not tight enough, and the gas extraction work is influenced. And the bag of the existing grouting hole packer is positioned at the rear side of the gas drainage pipe, the bag is easily unevenly distributed when being filled with slurry, and the acting force of the slurry on the pipe wall is uneven, so that the pipe wall is easily damaged.

In the traditional hole packer for grouting and hole sealing, when grouting is about to end, the position where slurry in a grouting pipe reaches and the pressure reached by the slurry cannot be determined, so that the time for stopping grouting is not easy to judge, the grouting cannot be stopped timely, the slurry overflows, or the pressure in the grouting pipe is overlarge and collapses, and the working efficiency is influenced; to avoid the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be that the shutoff of gas drilling is closely knit inadequately when present gas drainage, and when the slip casting was about to the end, the good opportunity of judging to stop the slip casting provides a simple structure, convenient to use, improves the mining slip casting hole packer of the closely knit degree of hole sealing mud greatly.

In order to solve the technical problem, the utility model adopts the following technical scheme: a mining grouting hole packer comprises an annular cloth bag, a grouting pipe and a water-gas discharge pipe; the annular cloth bag comprises a front cloth bag and a plurality of rear cloth bags, a water and gas discharge pipe penetrates through the front cloth bag and then extends to a position between the front cloth bag and the first rear cloth bag, and a grouting pipe penetrates through the front cloth bag and then sequentially penetrates through the rear cloth bags; the two ends of the front cloth bag are fixedly bound on the grouting pipe and the water and gas discharge pipe; two ends of the rear cloth bag are fixedly bound on the grouting pipe.

The rear end of the water vapor discharge pipe is provided with an isolation cloth bag I.

The front end of the grouting pipe is provided with a slurry leakage hole, the outer side of the slurry leakage hole is sleeved with an observation pipe, and two ends of the observation pipe are bound on the grouting pipe.

The annular cloth bag comprises an inner bag layer and an outer bag layer, a grouting cavity is formed between the inner bag layer and the outer bag layer, the inner bag layer is wound to form a through hole penetrating through the gas extraction pipe, the outer bag layer is sleeved on the outer side of the inner bag layer, the grouting pipe penetrates through the grouting cavity, and a grouting outlet is formed in the grouting pipe in the grouting cavity.

The water-gas discharge pipe in the front cloth bag is provided with a water-gas inlet, and the outer side of the water-gas inlet is sleeved with an isolation cloth bag II.

The two ends of the inner bag layer and the outer bag layer are sealed, and the two ends of the inner bag layer and the outer bag layer are fixedly bound on the grouting pipe or the water vapor discharge pipe.

The arrangement of the water vapor discharge pipe of the utility model is convenient for discharging the water vapor generated in the grouting and slurry solidification processes in time, and preventing the air or water from condensing in the cement and influencing the compactness of gas drilling plugging; the setting of observation window, through the setting of observing the pipe, operating personnel can easily judge whether the slip casting is accomplished, and then judges whether can stop the slip casting, and the judgement process is swift convenient. The annular cloth bag is sleeved on the gas drainage pipe, so that the slurry is uniformly distributed outside the gas drainage pipe.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the front cloth bag of the present invention;

fig. 3 is a schematic view of the longitudinal section structure of the front cloth bag of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1 to 3, the mining grouting hole packer comprises an annular cloth bag 1, a grouting pipe 2 and a water-gas discharge pipe 5; the annular cloth bag 1 comprises a front cloth bag 16 and a plurality of rear cloth bags 17, the water-air discharge pipe 5 penetrates through the front cloth bag 16 and then extends to a position between the front cloth bag 16 and the first rear cloth bag 17, and the grouting pipe 2 penetrates through the front cloth bag 16 and then sequentially penetrates through the rear cloth bags 17; two ends of the front cloth bag 16 are fixedly bound on the grouting pipe 2 and the water and gas discharge pipe 5; two ends of the rear cloth bag 17 are fixedly bound on the grouting pipe 2.

The rear end of the water vapor discharge pipe 5 is provided with an isolation cloth bag I51. The setting of sack I is kept apart to 5 rear ends of vapor discharge pipe, guarantees that moisture and air in the mud can get into, and mud can not get into, and 5 front ends of vapor discharge pipe stretch out and discharge air or moisture that the cement coagulation process discharged out behind the gas drilling, prevent that air or moisture from condensing in cement, influence the closely knit nature of gas drilling shutoff.

The front end of the grouting pipe 2 is provided with a slurry leakage hole 24, the outer side of the slurry leakage hole 24 is sleeved with an observation pipe 23, and two ends of the observation pipe 23 are bound on the grouting pipe 2. The sealing performance and binding strength of the binding part between the two ends of the observation tube 23 and the grouting tube 2 are ensured, the elasticity of the observation tube 23 is greater than that of the grouting tube 2, the compression deformation of the observation tube 23 is controlled to be about 0.8Mpa, and 0.8Mpa is the pressure reached in the grouting tube after the grouting is finished; the observation pipe 23 can adopt nylon tube or plastic tubing to have certain intensity, guarantee when the slip casting is about to end, produce when slip casting pipe 2 internal pressure reaches about 0.8Mpa and warp, show that can stop the slip casting, through the setting of observation pipe 23, operating personnel can easily judge whether the slip casting is accomplished, and then judge whether can stop the slip casting, and the judgement process is swift convenient.

The annular cloth bag 1 comprises an inner bag layer 11 and an outer bag layer 12, a grouting cavity 13 is formed between the inner bag layer 11 and the outer bag layer 12, the inner bag layer 11 is wound to form a through hole 4 penetrating through the gas extraction pipe 3, the outer bag layer 12 is sleeved on the outer side of the inner bag layer 11, the grouting pipe 2 penetrates through the grouting cavity 13, and a grouting outlet 21 is formed in the grouting pipe 2 in the grouting cavity 13. When hole sealing is carried out, the gas extraction pipe 3 is sleeved in the through hole 4 for gas extraction and grouting.

The water vapor discharge pipe 5 in the front cloth bag 16 is provided with a water vapor inlet 52, and the outer side of the water vapor inlet 52 is sleeved with an isolation cloth bag II 53. The arrangement of the isolation cloth bag II53 ensures that moisture and air in the slurry of the front cloth bag 16 can enter, but the slurry cannot enter.

The two ends of the inner bag layer 11 and the outer bag layer 12 are sealed, and the two ends of the inner bag layer 11 and the outer bag layer 12 are fixedly bound on the grouting pipe 2 or the water vapor discharge pipe 5. The two ends of the inner bag layer 11 and the outer bag layer 12 are hermetically connected, namely are sewn together, so that slurry in the grouting cavity 13 is prevented from leaking from the two ends of the grouting cavity; two ends of the inner bag layer 11 and the outer bag layer 12 in the length direction of the annular cloth bag 1 respectively extend to form a grouting pipe through hole 22 or a water vapor discharge pipe through hole 54 which are communicated with the grouting cavity 13, the grouting pipe 1 sequentially penetrates through the rear cloth bag 17 through the grouting pipe through hole 22, the water vapor discharge pipe 5 sequentially penetrates through the annular front cloth bag 16 through the water vapor discharge pipe through hole 54, and slurry in the grouting cavity 13 is prevented from leaking from the positions between the grouting pipe through hole 22 and the grouting pipe 1 and between the water vapor discharge pipe 5 and the water vapor discharge pipe through hole 54 by closely attaching and binding.

The grouting pipe 2 is also provided with a blasting valve for blasting grouting of the grouting pipe at the position, and a single check valve is arranged on the rear side of the grout outlet to prevent mud from flowing backwards at the position and influencing grouting.

Claims

1. A mining slip casting hole packer is characterized in that: comprises an annular cloth bag (1), a grouting pipe (2) and a water vapor discharge pipe (5); the annular cloth bag (1) comprises a front cloth bag (16) and a plurality of rear cloth bags (17), a water vapor discharge pipe (5) penetrates through the front cloth bag (16) and then extends to a position between the front cloth bag (16) and the first rear cloth bag (17), and a grouting pipe (2) penetrates through the front cloth bag (16) and then sequentially penetrates through the rear cloth bags (17); two ends of the front cloth bag (16) are fixedly bound on the grouting pipe (2) and the water vapor discharge pipe (5); two ends of the rear cloth bag (17) are fixedly bound on the grouting pipe (2).

2. The mining grouting hole packer according to claim 1, characterized in that: the rear end of the water vapor discharge pipe (5) is provided with an isolation cloth bag I (51).

3. The mining grouting hole packer according to claim 1, characterized in that: the front end of the grouting pipe (2) is provided with a slurry leakage hole (24), the outer side of the slurry leakage hole (24) is sleeved with an observation pipe (23), and two ends of the observation pipe (23) are bound on the grouting pipe (2).

4. The mining grouting hole packer according to claim 1, characterized in that: annular cloth bag (1) include inner bag layer (11) and outer bag layer (12), form slip casting chamber (13) between inner bag layer (11) and outer bag layer (12), inner bag layer (11) are convoluteed and are constituted through-hole (4) of wearing to establish gas drainage pipe (3), outer bag layer (12) cover is established in the inner bag layer (11) outside, slip casting pipe (2) pass slip casting chamber (13), be equipped with out grout mouth (21) on slip casting pipe (2) in slip casting chamber (13).

5. The mining grouting hole packer according to claim 4, characterized in that: a water vapor inlet (52) is arranged on the water vapor discharge pipe (5) in the front cloth bag (16), and an isolation cloth bag II (53) is sleeved outside the water vapor inlet (52).

6. The mining grouting hole packer according to claim 4, characterized in that: the two ends of the inner bag layer (11) and the outer bag layer (12) are sealed, and the two ends of the inner bag layer (11) and the outer bag layer (12) are fixedly bound on the grouting pipe (2) or the water vapor discharge pipe (5).