CN114016954A - Multifunctional gas pumping and mining hole sealing device for annular hole plugging and supplementing - Google Patents

Abstract

A multifunctional gas extraction and sealing device with annular hole plugging and supplementing injection comprises an extraction pipe, wherein a plurality of cylindrical hole sealing tire bags are arranged on the extraction pipe at intervals, and an annular hole injection end is fixedly sleeved at two ends of each hole sealing tire bag on the extraction pipe; a plurality of grouting pipes penetrate through annular hole grouting ends at two ends of the foremost hole sealing tire bag, all the grouting pipes are arranged in a circumferential array along the central line of the extraction pipe, the rear end grouting openings of one half of the grouting pipes extend into the position between the two adjacent hole sealing tire bags respectively, the rear end grouting openings of the other half of the grouting pipes are closed, and grouting holes are formed in the hole sealing tire bags respectively. The device is used for early-stage hole sealing after the coal seam drilling construction is finished, grouting and leakage blocking are performed on the deformation of the drilled hole and leakage caused by roadway stress concentration in the middle stage, and the coal body is stabilized and stabilized by later-stage water injection for coal mining infiltration and has a dust-reducing function, so that the device can be used for multiple purposes; and ensuring normal extraction of the borehole gas in the whole extraction period.

Description

Multifunctional gas pumping and mining hole sealing device for annular hole plugging and supplementing

Technical Field

The invention belongs to the technical field of coal mine gas extraction, and particularly relates to a multifunctional gas extraction hole sealing device for annular hole plugging and recharging, which is used for the aspects of grouting hole sealing, slurry supplementing and leaking stoppage, water injection and dust reduction and the like after a coal seam is drilled in a coal mine.

Background

The coal seam gas extraction under the coal mine is a main means for solving the coal mine gas safety problem, in the coal seam gas extraction drilling and sealing, the existing hole sealing device has lower compressive strength, the drilling hole is deformed due to the fact that a stress concentration area is transferred to the deep part of a roadway due to the deformation of the roadway in the later period after the hole sealing, the extraction drilling hole is leaked by light persons, and the extraction pipe is directly flattened by heavy persons to cause that only the concentration has no flow. Some mines adopt to close the extraction drill hole to process the air leakage of the drill hole, and some mines directly break the original hole sealing device and the original hole sealing section for sealing again along the drill hole position by using a drilling machine, so that the cycle is repeated, the later-stage gas extraction efficiency and the extraction concentration are directly influenced, and a large amount of labor workload and capital cost are increased.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides the multifunctional gas pumping and sealing device which is simple and convenient to operate, low in construction cost and small in labor capacity, and can be used for sealing and injecting the annular hole immediately after air leakage is found.

In order to solve the technical problems, the invention adopts the following technical scheme: a multifunctional gas pumping and sealing device with annular hole plugging and supplementing injection comprises an extraction pipe, wherein the extraction pipe is arranged in the front-back direction along the length direction, a plurality of cylindrical hole sealing tire bags are arranged on the extraction pipe at intervals, annular hole injection ends are fixedly sleeved at two ends of each hole sealing tire bag on the extraction pipe, and the front end and the rear end of each hole sealing tire bag are fixedly connected to outer circles of the corresponding annular hole injection ends through flexible rubber hoops;

a plurality of grouting pipes penetrate through annular hole grouting ends at two ends of the foremost hole sealing tire bag, all the grouting pipes are arranged in a circumferential array along the central line of the extraction pipe, the rear end grouting openings of one half of the grouting pipes extend into the position between the two adjacent hole sealing tire bags respectively, the rear end grouting openings of the other half of the grouting pipes are closed, and grouting holes are formed in the hole sealing tire bags respectively.

Four hole sealing tire bags are arranged, and the front end and the rear end of each hole sealing tire bag are integrally provided with a sleeve; eight annular hole grouting ends are arranged, inner circles of the eight annular hole grouting ends are sleeved on an outer circle of the extraction pipe and are fixedly bonded through glue solution, inner circles of the sleeves are sleeved on the outer circle of the annular hole grouting ends and are fixedly bonded through the glue solution, and flexible rubber is tightly hooped and fastened on the outer circle of the sleeves;

setting a first hole sealing tire bag, a second hole sealing tire bag, a third hole sealing tire bag and a fourth hole sealing tire bag from front to back in sequence;

and the annular hole grouting end is set to be a first annular hole grouting end, a second annular hole grouting end, a third annular hole grouting end, a fourth annular hole grouting end, a fifth annular hole grouting end, a sixth annular hole grouting end, a seventh annular hole grouting end and an eighth annular hole grouting end from front to back in sequence.

Six first jacks are respectively formed in the first annular hole grouting end and the second annular hole grouting end, five second jacks are formed in the third annular hole grouting end, a first blind hole and four third jacks are formed in the fourth annular hole grouting end, three fourth jacks are formed in the fifth annular hole grouting end, a second blind hole and two fifth jacks are formed in the sixth annular hole grouting end, a sixth jack is formed in the seventh annular hole grouting end, and a third blind hole is formed in the eighth annular hole grouting end;

the first grouting pipe sequentially penetrates through a first jack of a first annular hole grouting end, a first hole sealing tire bag, a first jack of a second annular hole grouting end, a second jack of a third annular hole grouting end and a second hole sealing tire bag from front to back and then extends into a first blind hole sealed on a fourth annular hole grouting end;

a second grouting pipe sequentially penetrates through a first jack of the first annular hole grouting end, the first hole sealing tire bag and a first jack of the second annular hole grouting end from front to back and then extends into a position between the first hole sealing tire bag and the second hole sealing tire bag;

a third grouting pipe sequentially penetrates through a first jack of a first annular hole grouting end, a first hole sealing tire bag, a first jack of a second annular hole grouting end, a second jack of a third annular hole grouting end, a second hole sealing tire bag, a third jack of a fourth annular hole grouting end, a fourth jack on a fifth annular hole grouting end and a third hole sealing tire bag from front to back and then extends into a second blind hole sealed on a sixth annular hole grouting end;

the fourth grouting pipe sequentially penetrates through a first jack of the first annular hole grouting end, the first hole sealing tire bag, a first jack of the second annular hole grouting end, a second jack of the third annular hole grouting end, the second hole sealing tire bag and a third jack of the fourth annular hole grouting end from front to back and then extends into a position between the second hole sealing tire bag and the third hole sealing tire bag;

a fifth grouting pipe sequentially penetrates through a first jack of a first annular hole grouting end, a first hole sealing tire bag, a first jack of a second annular hole grouting end, a second jack of a third annular hole grouting end, a second hole sealing tire bag, a third jack of a fourth annular hole grouting end, a fourth jack of a fifth annular hole grouting end, a third hole sealing tire bag, a fifth jack of a sixth annular hole grouting end, a sixth jack of a seventh annular hole grouting end and a fourth hole sealing tire bag from front to back and then extends into a third blind hole sealed in an eighth annular hole grouting end;

the sixth grouting pipe sequentially penetrates through a first jack of the first annular hole grouting end, the first hole sealing tire bag, a first jack of the second annular hole grouting end, a second jack of the third annular hole grouting end, the second hole sealing tire bag, a third jack of the fourth annular hole grouting end, a fourth jack of the fifth annular hole grouting end, the third hole sealing tire bag and a fifth jack of the sixth annular hole grouting end from front to back and then extends into a position between the third hole sealing tire bag and the fourth hole sealing tire bag.

The grouting holes in the first grouting pipe are arranged in the first hole sealing tire bag and the second hole sealing tire bag, the grouting holes in the third grouting pipe are arranged in the third hole sealing tire bag, and the grouting holes in the fifth grouting pipe are arranged in the fourth hole sealing tire bag;

and the grouting holes on the first grouting pipe, the third grouting pipe and the fifth grouting pipe and the rear end grouting outlets of the second grouting pipe, the fourth grouting pipe and the sixth grouting pipe are all provided with one-way valves.

The excircle of the grouting pipe is connected with the jack of the annular hole grouting end in corresponding contact through gluing in a sealing manner.

By adopting the technical scheme, when hole sealing operation is carried out on site, the concrete working process of the invention is as follows:

(1) annular hole grouting ends are respectively arranged on the inner circles of the sleeves at the front end and the rear end of each of the four hole sealing tire bags, and are fixed into a whole through gluing and flexible rubber hooping to form four hole sealing assemblies;

(2) the method comprises the following steps of (1) sleeving and fixing four hole sealing assemblies, namely four hole sealing tire bags provided with annular hole grouting ends on an extraction pipe one by one, and then inserting six grouting pipes into corresponding jacks and/or blind holes to assemble a hole sealing device;

(3) inserting the assembled hole sealing device into a preset hole sealing depth from front to back along the coal seam drilling hole;

(4) stirring grouting liquid, and grouting the inside of the hole sealing device to preliminarily seal the hole of the drill hole;

(5) the rear end of the extraction pipe is connected with an extraction system pipeline, normal gas extraction is started, and gas is extracted from an extraction hole;

(6) in an extraction period, if the phenomena of borehole deformation and obvious reduction of gas concentration in a borehole are found, the phenomena that a roadway high-stress area is transferred to a deep part to cause air leakage of an extraction borehole may occur, and grouting and hole sealing operation is further performed inside a hole sealing device;

(7) after the gas extraction operation is finished and before the coal is extracted by the coal mining machine, water is injected into the coal body at high pressure through the extraction holes of the extraction pipe to soak the coal body, so that the stability of the coal body is improved, and the dust fall effect can be realized in the coal extraction process.

The step (2) is specifically as follows: firstly, the extraction pipes pass through the central holes of the annular hole grouting end one by one from front to back, and simultaneously pass through the four hole sealing tire bags in sequence; adjusting the distance between two adjacent hole sealing assemblies to meet the hole sealing requirement, rotating the four hole sealing assemblies to enable the jacks on the annular hole grouting end to correspond to the jacks, the jacks and the blind holes one by one, then penetrating six grouting pipes into the corresponding through holes and the blind holes, and finally bonding the inner circle of the annular hole grouting end and the outer circle of the extraction pipe into a whole by using glue solution.

The step (4) is specifically as follows: connecting an outlet of a grouting pump with a front port of a first grouting pipe, starting a grouting pump, discharging slurry through a one-way valve in a first hole sealing tire bag and a one-way valve in a second hole sealing tire bag, expanding the first hole sealing tire bag and the second hole sealing tire bag, pressing the outer circles of the expanded first hole sealing tire bag and the second hole sealing tire bag with the hole wall of a drilled hole, sealing the drilled hole, and stopping the grouting pump to stop grouting into the first hole sealing tire bag and the second hole sealing tire bag when the display value of a pressure gauge on the grouting pump reaches a preset pressure; and then connecting an outlet of the grouting pump with the front port of a second grouting pipe, starting the grouting pump, grouting slurry into a cavity between the first hole sealing tire bag and the second hole sealing tire bag, enabling the slurry to penetrate into a hole wall crack of the drill hole, further improving the hole sealing effect after solidification, and completing grouting and preliminary hole sealing operation until the cavity is filled with the slurry and the slurry penetrates into the hole wall crack of the drill hole.

The concrete process of further carrying out grouting hole sealing operation on the interior of the hole sealing device in the step (6) is as follows: connecting the outlet of a grouting pump with the front port of a third grouting pipe, starting a grouting pump, discharging the grout through a one-way valve in a third hole sealing tire bag, expanding the third hole sealing tire bag, pressing the outer circle of the expanded third hole sealing tire bag with the hole wall of a drilled hole, and stopping the grouting pump from grouting into the third hole sealing tire bag when the display value of a pressure gauge on the grouting pump reaches a preset pressure; then connecting the outlet of the grouting pump with the front port of a fourth grouting pipe, starting the grouting pump, starting grouting slurry into a cavity between the second hole sealing tire bag and the third hole sealing tire bag, enabling the slurry to penetrate into hole wall cracks of the drilled hole, and further improving the hole sealing effect after solidification until the cavity is filled with the slurry, and meanwhile, enabling the slurry to penetrate into the hole wall cracks of the drilled hole, observing the change condition of a pressure gauge on the grouting pump, wherein if the pressure can be stabilized at a preset value, the situation that too large cracks do not exist around the third hole sealing tire bag is shown, and at the moment, grouting can be used for plugging the drilled hole; if the pressure can not be maintained, the situation that the third hole sealing tire bag is located in a high stress area and coal around a drill hole is broken is shown, at the moment, a grouting pump is required to be connected with a fifth grouting pipe, the grouting pump is started, the grout is discharged through a one-way valve in a fourth hole sealing tire bag, the fourth hole sealing tire bag is expanded, the outer circle of the expanded fourth hole sealing tire bag is in compression joint with the hole wall of the drill hole, and when the display value of a pressure gauge on the grouting pump reaches a preset pressure, the grouting pump is closed to stop grouting into the fourth hole sealing tire bag; and then connecting an outlet of the grouting pump with a front port of a sixth grouting pipe, starting the grouting pump, starting grouting slurry into a cavity between the third hole sealing tire bag and the fourth hole sealing tire bag, enabling the slurry to penetrate into a hole wall crack of the drill hole, further improving the hole sealing effect after solidification, and stopping grouting until the slurry is full of the cavity and penetrates into the hole wall crack of the drill hole at the same time until the preset grouting pressure is reached so as to finish the final hole sealing operation.

Due to the arrangement of the one-way valve, when the grouting pump is dismounted, the slurry injected into the cavity between the hole sealing tire bag and the adjacent hole sealing tire bag cannot flow backwards outwards through the grouting pipe.

In conclusion, the device has scientific principle, simple structure, easy installation and convenient operation, is used for sealing holes in the early stage after the drilling construction of the coal seam is completed, grouting and plugging are carried out on the deformed holes and the air leakage caused by the stress concentration of the roadway in the middle stage, and the later stage water injection stabilizes coal bodies for coal mining infiltration and has the function of dust removal, thereby realizing multiple purposes of one set of device. The special structural design of the invention can resist larger coal bed pressure, prevent the extraction pipe from being damaged by pressure caused by coal body hole collapse deformation, and ensure the normal extraction of the borehole gas in the whole extraction period.

Drawings

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

FIG. 2 is an enlarged view at B in FIG. 1;

FIG. 3 is a side view of the first annular hole grouting tip of FIG. 1;

FIG. 4 is a side view of the second annular hole grouting tip of FIG. 1;

FIG. 5 is a side view of the third annular hole grouting tip of FIG. 1;

FIG. 6 is a side view of the fourth annular bore grouting tip of FIG. 1;

FIG. 7 is a side view of the fifth annular hole grouting tip of FIG. 1;

FIG. 8 is a side view of the sixth annular hole grouting tip of FIG. 1;

FIG. 9 is a side view of the seventh annular hole grouting tip of FIG. 1;

fig. 10 is a side view of the eighth annular hole grouting tip of fig. 1.

Detailed Description

As shown in fig. 1-10, the multifunctional gas extraction and sealing device for annular hole sealing and supplementing injection comprises an extraction pipe 1 which is arranged along the front-back direction in the length direction, a plurality of cylindrical sealing tire bags are arranged on the extraction pipe 1 at intervals, annular hole injection ends are fixedly sleeved at two ends of each sealing tire bag on the extraction pipe 1, and the front end and the rear end of each sealing tire bag are fixedly connected to the outer circle of the corresponding annular hole injection end through flexible rubber tightening hoops 2;

a plurality of grouting pipes 3 penetrate through annular hole grouting ends at two ends of the foremost hole sealing tire bag, all the grouting pipes 3 are arranged along the circumference of the central line of the extraction pipe 1 in an array mode, the rear end grouting openings of one half of the grouting pipes 3 respectively extend into the position between the two adjacent hole sealing tire bags, and the rear end grouting openings of the other half of the grouting pipes 3 are closed and provided with grouting holes in the hole sealing tire bags respectively.

Four hole sealing tire bags are arranged, and sleeves 6 are uniformly arranged at the front end and the rear end of each hole sealing tire bag; eight annular hole grouting ends are arranged, inner circles of the eight annular hole grouting ends are sleeved on an outer circle of the extraction pipe 1 and are bonded and fixed through glue solution, inner circles of the sleeves 6 are sleeved on the outer circle of the annular hole grouting ends and are bonded and fixed through the glue solution, and the flexible rubber hoops 2 are fastened on the outer circles of the sleeves 6;

setting a first hole sealing tire bag 7, a second hole sealing tire bag 8, a third hole sealing tire bag 9 and a fourth hole sealing tire bag 10 in sequence from front to back;

the set annular hole grouting end sequentially comprises a first annular hole grouting end 11, a second annular hole grouting end 12, a third annular hole grouting end 13, a fourth annular hole grouting end 14, a fifth annular hole grouting end 15, a sixth annular hole grouting end 16, a seventh annular hole grouting end 17 and an eighth annular hole grouting end 18 from front to back.

Six first jacks 19 are respectively formed in the first annular hole grouting end 11 and the second annular hole grouting end 12, five second jacks 21 are formed in the third annular hole grouting end 13, a first blind hole 20 and four third jacks 22 are formed in the fourth annular hole grouting end 14, three fourth jacks 24 are formed in the fifth annular hole grouting end 15, a second blind hole 23 and two fifth jacks 25 are formed in the sixth annular hole grouting end 16, a sixth jack 27 is formed in the seventh annular hole grouting end 17, and a third blind hole 26 is formed in the eighth annular hole grouting end 18;

six grouting pipes 3 are arranged, the six grouting pipes 3 are all parallel to the extraction pipe 1, the first grouting pipe 3 sequentially penetrates through a first jack 19 of a first annular hole grouting end 11, a first hole sealing tire bag 7, a first jack 19 of a second annular hole grouting end 12, a second jack 21 of a third annular hole grouting end 13 and a second hole sealing tire bag 8 from front to back and then extends into a first blind hole 20 sealed on a fourth annular hole grouting end 14;

the second grouting pipe 3 sequentially penetrates through a first jack 19 of the first annular hole grouting end 11, the first hole sealing tire bag 7 and a first jack 19 of the second annular hole grouting end 12 from front to back and then extends into a position between the first hole sealing tire bag 7 and the second hole sealing tire bag 8;

the third grouting pipe 3 sequentially passes through a first jack 19 of the first annular hole grouting end 11, the first hole sealing tire bag 7, a first jack 19 of the second annular hole grouting end 12, a second jack 21 of the third annular hole grouting end 13, the second hole sealing tire bag 8, a third jack 22 of the fourth annular hole grouting end 14, a fourth jack 24 of the fifth annular hole grouting end 15 and the third hole sealing tire bag 9 from front to back and then extends into a second blind hole 23 sealed on the sixth annular hole grouting end 16;

the fourth grouting pipe 3 sequentially passes through a first jack 19 of the first annular hole grouting end 11, the first hole sealing tire bag 7, a first jack 19 of the second annular hole grouting end 12, a second jack 21 of the third annular hole grouting end 13, the second hole sealing tire bag 8 and a third jack 22 of the fourth annular hole grouting end 14 from front to back and then extends into a position between the second hole sealing tire bag 8 and the third hole sealing tire bag 9;

the fifth grouting pipe 3 sequentially passes through a first jack 19 of the first annular hole grouting end 11, the first hole sealing tire bag 7, a first jack 19 of the second annular hole grouting end 12, a second jack 21 of the third annular hole grouting end 13, the second hole sealing tire bag 8, a third jack 22 of the fourth annular hole grouting end 14, a fourth jack 24 of the fifth annular hole grouting end 15, the third hole sealing tire bag 9, a fifth jack 25 of the sixth annular hole grouting end 16, a sixth jack 27 of the seventh annular hole grouting end 17, and the fourth hole sealing tire bag 10 from front to back and then extends into a third blind hole 26 sealed on the eighth annular hole grouting end 18;

the sixth grouting pipe 3 sequentially passes through a first jack 19 of the first annular hole grouting end 11, the first hole sealing tire bag 7, a first jack 19 of the second annular hole grouting end 12, a second jack 21 of the third annular hole grouting end 13, the second hole sealing tire bag 8, a third jack 22 of the fourth annular hole grouting end 14, a fourth jack 24 of the fifth annular hole grouting end 15, the third hole sealing tire bag 9 and a fifth jack 25 of the sixth annular hole grouting end 16 from front to back and then extends into a position between the third hole sealing tire bag 9 and the fourth hole sealing tire bag 10.

The grouting holes on the first grouting pipe 3 are arranged in the first hole sealing tire bag 7 and the second hole sealing tire bag 8, the grouting holes on the third grouting pipe 3 are arranged in the third hole sealing tire bag 9, and the grouting holes on the fifth grouting pipe 3 are arranged in the fourth hole sealing tire bag 10;

and the grouting holes on the first grouting pipe 3, the third grouting pipe 3 and the fifth grouting pipe 3 and the rear end grouting outlets of the second grouting pipe 3, the fourth grouting pipe 3 and the sixth grouting pipe 3 are respectively provided with a check valve 5.

The outer circle of the grouting pipe 3 is connected with the jack of the annular hole grouting end in corresponding contact in a sealing mode through gluing.

When hole sealing operation is carried out on site, the specific working process of the invention is as follows:

(1) annular hole grouting ends are respectively arranged on the inner circles of the sleeves 6 at the front end and the rear end of each of the four hole sealing tire bags, and are fixed into a whole through gluing and the flexible rubber hoops 2 to form four hole sealing assemblies;

(2) the method comprises the following steps of (1) sleeving and fixing four hole sealing assemblies, namely four hole sealing tire bags provided with annular hole grouting ends on an extraction pipe 1 one by one, and then inserting six grouting pipes 3 into corresponding jacks and/or blind holes to assemble a hole sealing device;

(3) inserting the assembled hole sealing device into a preset hole sealing depth from front to back along the coal seam drilling hole;

(4) stirring grouting liquid, and grouting the inside of the hole sealing device to preliminarily seal the hole of the drill hole;

(5) the rear end of the extraction pipe 1 is connected with an extraction system pipeline, normal gas extraction is started, and gas is extracted from an extraction hole;

(6) in an extraction period, if the phenomena of borehole deformation and obvious reduction of gas concentration in a borehole are found, the phenomena that a roadway high-stress area is transferred to a deep part to cause air leakage of an extraction borehole may occur, and grouting and hole sealing operation is further performed inside a hole sealing device;

(7) after the gas extraction operation is finished and before the coal is extracted by the coal mining machine, water is injected into the coal body at high pressure through the extraction holes of the extraction pipe 1 to soak the coal body, so that the stability of the coal body is improved, and a dust falling effect can be achieved in the coal extraction process.

The step (2) is specifically as follows: firstly, the extraction pipes pass through the central holes of the annular hole grouting end one by one from front to back, and simultaneously pass through the four hole sealing tire bags in sequence; adjusting the distance between two adjacent hole sealing assemblies to meet the hole sealing requirement, rotating the four hole sealing assemblies to enable the jacks on the annular hole grouting end to correspond to the jacks, the jacks and the blind holes one by one, then penetrating six grouting pipes 3 into the corresponding through holes and the blind holes, and finally bonding the inner circle of the annular hole grouting end and the outer circle of the extraction pipe into a whole by using glue solution.

The step (4) is specifically as follows: connecting an outlet of a grouting pump with a front port of a first grouting pipe 3, starting the grouting pump, discharging slurry through a one-way valve 5 in a first hole sealing tire bag 7 and a one-way valve 5 in a second hole sealing tire bag 8, expanding the first hole sealing tire bag 7 and the second hole sealing tire bag 8, pressing the outer circles of the expanded first hole sealing tire bag 7 and the second hole sealing tire bag 8 with the hole wall of a drilled hole, sealing the drilled hole, and stopping the grouting pump to stop grouting into the first hole sealing tire bag 7 and the second hole sealing tire bag 8 when the display value of a pressure gauge on the grouting pump reaches a preset pressure; and then connecting the outlet of the grouting pump with the front port of the second grouting pipe 3, starting the grouting pump, grouting slurry into a cavity between the first hole sealing tire bag 7 and the second hole sealing tire bag 8, enabling the slurry to penetrate into hole wall cracks of the drill hole, further improving the hole sealing effect after solidification, and completing grouting and preliminary hole sealing operation until the cavity is full of the slurry and the hole wall cracks of the drill hole are penetrated by the slurry.

The concrete process of further carrying out grouting hole sealing operation on the interior of the hole sealing device in the step (6) is as follows: connecting the outlet of a grouting pump with the front port of a third grouting pipe 3, starting the grouting pump, discharging the slurry through a one-way valve 5 in a third hole sealing tire bag 9, expanding the third hole sealing tire bag 9, pressing the outer circle of the expanded third hole sealing tire bag 9 with the hole wall of a drilled hole, and stopping the grouting pump to stop grouting into the third hole sealing tire bag 9 when the display value of a pressure gauge on the grouting pump reaches a preset pressure; then connecting the outlet of the grouting pump with the front port of a fourth grouting pipe 3, starting the grouting pump, starting grouting slurry into a cavity between a second hole sealing tire bag 8 and a third hole sealing tire bag 9, enabling the slurry to penetrate into a hole wall crack of a drill hole, further improving the hole sealing effect after solidification until the cavity is filled with the slurry, and meanwhile, enabling the slurry to penetrate into the hole wall crack of the drill hole, observing the change condition of a pressure gauge on the grouting pump, and if the pressure can be stabilized at a preset value, indicating that no large crack is generated around the third hole sealing tire bag 9, and then grouting to seal the drill hole; if the pressure can not be maintained, the situation that the third hole sealing tire bag 9 is located in a high stress area and around a drill hole is broken is shown, at the moment, a grouting pump is required to be connected with a fifth grouting pipe 3, the grouting pump is started, the grout is discharged through a one-way valve 5 in a fourth hole sealing tire bag 10, the fourth hole sealing tire bag 10 is expanded, the outer circle of the expanded fourth hole sealing tire bag 10 is in compression joint with the hole wall of the drill hole, and when the display value of a pressure gauge on the grouting pump reaches a preset pressure, the grouting pump is closed and grouting into the fourth hole sealing tire bag 10 is stopped; and then connecting the outlet of the grouting pump with the front port of a sixth grouting pipe 3, starting the grouting pump, grouting slurry into a cavity between a third hole sealing tire bag 9 and a fourth hole sealing tire bag 10, enabling the slurry to penetrate into a hole wall crack of the drill hole, further improving the hole sealing effect after solidification, and stopping grouting until the slurry is full of the cavity and penetrates into the hole wall crack of the drill hole at the same time until the preset grouting pressure is reached so as to finish the final hole sealing operation.

Due to the arrangement of the one-way valve 5, when the grouting pump is dismounted, the grout injected into the cavity between the hole sealing tire bag and the adjacent hole sealing tire bag can not flow backwards through the grouting pipe 3.

The foregoing embodiments illustrate the principles and features of the present invention, but the above description is only illustrative of the preferred embodiments of the present invention and is not meant to be limiting of the embodiments. In the light of this patent, a person skilled in the art can make many changes and modifications without departing from the spirit of the invention and the scope of protection of the claims, and for example, the sealed tyre bag and the grouting pipe 3 can be arranged more, and these are all within the scope of protection of the invention. Therefore, the patent and protection scope of the present invention should be subject to the appended claims.

Claims (5)

1. The utility model provides a multi-functional gas pumping sealing device of annular hole shutoff benefit notes which characterized in that: the device comprises an extraction pipe arranged along the front-back direction in the length direction, wherein a plurality of cylindrical hole sealing tire bags are arranged on the extraction pipe at intervals, annular hole grouting ends are fixedly sleeved at two ends of each hole sealing tire bag on the extraction pipe, and the front end and the rear end of each hole sealing tire bag are fixedly connected to the outer circle of the corresponding annular hole grouting end through flexible rubber hoops;

a plurality of grouting pipes penetrate through annular hole grouting ends at two ends of the foremost hole sealing tire bag, all the grouting pipes are arranged in a circumferential array along the central line of the extraction pipe, the rear end grouting openings of one half of the grouting pipes extend into the position between the two adjacent hole sealing tire bags respectively, the rear end grouting openings of the other half of the grouting pipes are closed, and grouting holes are formed in the hole sealing tire bags respectively.

2. The multifunctional gas pumping and sealing device for annular hole plugging and refilling according to claim 1, wherein: four hole sealing tire bags are arranged, and the front end and the rear end of each hole sealing tire bag are integrally provided with a sleeve; eight annular hole grouting ends are arranged, inner circles of the eight annular hole grouting ends are sleeved on an outer circle of the extraction pipe and are fixedly bonded through glue solution, inner circles of the sleeves are sleeved on the outer circle of the annular hole grouting ends and are fixedly bonded through the glue solution, and flexible rubber is tightly hooped and fastened on the outer circle of the sleeves;

setting a first hole sealing tire bag, a second hole sealing tire bag, a third hole sealing tire bag and a fourth hole sealing tire bag from front to back in sequence;

and the annular hole grouting end is set to be a first annular hole grouting end, a second annular hole grouting end, a third annular hole grouting end, a fourth annular hole grouting end, a fifth annular hole grouting end, a sixth annular hole grouting end, a seventh annular hole grouting end and an eighth annular hole grouting end from front to back in sequence.

3. The multifunctional gas pumping and sealing device for annular hole plugging and refilling according to claim 2, wherein: six first jacks are respectively formed in the first annular hole grouting end and the second annular hole grouting end, five second jacks are formed in the third annular hole grouting end, a first blind hole and four third jacks are formed in the fourth annular hole grouting end, three fourth jacks are formed in the fifth annular hole grouting end, a second blind hole and two fifth jacks are formed in the sixth annular hole grouting end, a sixth jack is formed in the seventh annular hole grouting end, and a third blind hole is formed in the eighth annular hole grouting end;

the first grouting pipe sequentially penetrates through a first jack of a first annular hole grouting end, a first hole sealing tire bag, a first jack of a second annular hole grouting end, a second jack of a third annular hole grouting end and a second hole sealing tire bag from front to back and then extends into a first blind hole sealed on a fourth annular hole grouting end;

a second grouting pipe sequentially penetrates through a first jack of the first annular hole grouting end, the first hole sealing tire bag and a first jack of the second annular hole grouting end from front to back and then extends into a position between the first hole sealing tire bag and the second hole sealing tire bag;

a third grouting pipe sequentially penetrates through a first jack of a first annular hole grouting end, a first hole sealing tire bag, a first jack of a second annular hole grouting end, a second jack of a third annular hole grouting end, a second hole sealing tire bag, a third jack of a fourth annular hole grouting end, a fourth jack on a fifth annular hole grouting end and a third hole sealing tire bag from front to back and then extends into a second blind hole sealed on a sixth annular hole grouting end;

the fourth grouting pipe sequentially penetrates through a first jack of the first annular hole grouting end, the first hole sealing tire bag, a first jack of the second annular hole grouting end, a second jack of the third annular hole grouting end, the second hole sealing tire bag and a third jack of the fourth annular hole grouting end from front to back and then extends into a position between the second hole sealing tire bag and the third hole sealing tire bag;

a fifth grouting pipe sequentially penetrates through a first jack of a first annular hole grouting end, a first hole sealing tire bag, a first jack of a second annular hole grouting end, a second jack of a third annular hole grouting end, a second hole sealing tire bag, a third jack of a fourth annular hole grouting end, a fourth jack of a fifth annular hole grouting end, a third hole sealing tire bag, a fifth jack of a sixth annular hole grouting end, a sixth jack of a seventh annular hole grouting end and a fourth hole sealing tire bag from front to back and then extends into a third blind hole sealed in an eighth annular hole grouting end;

the sixth grouting pipe sequentially penetrates through a first jack of the first annular hole grouting end, the first hole sealing tire bag, a first jack of the second annular hole grouting end, a second jack of the third annular hole grouting end, the second hole sealing tire bag, a third jack of the fourth annular hole grouting end, a fourth jack of the fifth annular hole grouting end, the third hole sealing tire bag and a fifth jack of the sixth annular hole grouting end from front to back and then extends into a position between the third hole sealing tire bag and the fourth hole sealing tire bag.

4. The multifunctional gas pumping and sealing device for annular hole plugging and refilling according to claim 3, wherein: the grouting holes in the first grouting pipe are arranged in the first hole sealing tire bag and the second hole sealing tire bag, the grouting holes in the third grouting pipe are arranged in the third hole sealing tire bag, and the grouting holes in the fifth grouting pipe are arranged in the fourth hole sealing tire bag;

and the grouting holes on the first grouting pipe, the third grouting pipe and the fifth grouting pipe and the rear end grouting outlets of the second grouting pipe, the fourth grouting pipe and the sixth grouting pipe are all provided with one-way valves.

5. The multifunctional gas pumping and sealing device for annular hole plugging and refilling according to claim 3, wherein: the excircle of the grouting pipe is connected with the jack of the annular hole grouting end in corresponding contact through gluing in a sealing manner.

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