CN115898321A - Hole sealing device for mining drilled gas extraction anti-collapse hole and using method thereof - Google Patents
Hole sealing device for mining drilled gas extraction anti-collapse hole and using method thereof Download PDFInfo
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- CN115898321A CN115898321A CN202310045712.4A CN202310045712A CN115898321A CN 115898321 A CN115898321 A CN 115898321A CN 202310045712 A CN202310045712 A CN 202310045712A CN 115898321 A CN115898321 A CN 115898321A
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Abstract
The invention relates to a hole sealing device for a mine drilled gas extraction collapse-proof hole and a using method thereof, wherein the hole sealing device comprises a gas extraction pipe, a sealing gasket and a first bag are fixedly sleeved on the gas extraction pipe, a first grouting pipe is fixedly communicated on the first bag, a second bag is also fixedly sleeved on the gas extraction pipe, the second bag and the first bag are arranged at intervals, and a second grouting pipe is fixedly communicated on the second bag; the gas extraction pipe is also sleeved with a pipe seam type sleeve, the pipe seam type sleeve is of a tubular structure with two open ends, a strip-shaped through hole is formed in the pipe seam type sleeve, one end, close to the sealing gasket, of the pipe seam type sleeve is abutted to the sealing gasket, a slurry return pipe is arranged in the pipe seam type sleeve, one end, close to the second bag, of the slurry return pipe is arranged at an interval with the second bag, a second slurry seepage port is formed in one side, close to the sealing gasket, of the second bag, and the second slurry injection pipe and the first slurry injection pipe penetrate through the pipe seam type sleeve.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a hole sealing device for a mine drilled gas extraction anti-collapse hole and a using method thereof.
Background
Coal is a main energy supply source in China, gas extraction is one of fundamental measures for preventing and treating coal mine gas disasters, at present, before gas extraction, hole sealing operation needs to be carried out on a drill hole, when the drill hole is sealed, the traditional mode adopted at present is to use a bag with a hollow elastic structure for hole sealing, specifically, the bag is fixed on a gas extraction pipe, the gas extraction pipe is inserted into the drill hole, slurry is injected into the bag to expand the bag, the bag can be abutted against the wall of the drill hole after being expanded, the wall of the drill hole can be supported when the bag is abutted against the wall of the drill hole, and the drill hole is sealed at the same time, but in the process of gas extraction, high-pressure gas needs to be injected into the drill hole to replace and replace gas in a coal seam, so that the requirements on the sealing performance and safety of the drill hole are high, and if the bag is used for sealing the drill hole, the sealing performance of the drill hole can be reduced when the bag is used for a long time; in addition, in the process of gas extraction, the cracks around the hole wall of the drill hole are high in development degree, the bag can only block the drill hole and cannot perform grouting on the cracks around the hole wall of the drill hole, the sealing requirement during gas extraction cannot be met, and hole collapse of the drill hole is easy to cause, so that the defects and the shortcomings in the prior art still exist.
Disclosure of Invention
The invention aims to provide a hole sealing device for a mining borehole gas extraction collapse-proof hole and a using method thereof, and aims to solve the problems in the background technology.
In order to solve the problems, the invention adopts the technical scheme that:
the hole sealing device for the mining borehole gas extraction collapse-preventing hole comprises a gas extraction pipe, wherein the gas extraction pipe comprises a head end and a tail end, and is characterized in that: the tail end of the gas extraction pipe is fixedly sleeved with a sealing gasket made of a flexible sealing material, the head end of the gas extraction pipe is fixedly sleeved with a first bag, the first bag is of a hollow elastic structure, the first bag is fixedly communicated with a first grouting pipe penetrating through the sealing gasket, a second bag is fixedly sleeved on the gas extraction pipe between the first bag and the sealing gasket, the second bag and the first bag are arranged at intervals, the second bag is also of a hollow elastic structure, the second bag is fixedly communicated with a second grouting pipe penetrating through the sealing gasket, and the first grouting pipe is positioned outside the second bag;
the gas extraction pipe between the second bag and the sealing gasket is sleeved with a pipe seam type sleeve, the pipe seam type sleeve is of a tubular structure with two ends open, a strip-shaped through hole which is as long as the pipe seam type sleeve is formed in the pipe seam type sleeve, one end, close to the sealing gasket, of the pipe seam type sleeve is abutted to the sealing gasket, a slurry return pipe penetrating through the sealing gasket is arranged in the pipe seam type sleeve, one end, close to the second bag, of the slurry return pipe is arranged at an interval with the second bag, a second slurry seepage port is formed in one side, close to the sealing gasket, of the second bag, and the second slurry injection pipe and the first slurry injection pipe penetrate through the pipe seam type sleeve respectively.
Furthermore, a plurality of liquid seepage through holes are formed in the outer wall of one end, away from the sealing gasket, of the pipe seam type sleeve.
Furthermore, one end, away from the sealing gasket, of the pipe seam type sleeve pipe is arranged to be of a conical structure, and the outer diameter, away from one end of the sealing gasket, of the conical structure is smaller than that of the other end of the conical structure.
Furthermore, a first slurry permeating port is formed in one side, close to the sealing gasket, of the first bag.
Furthermore, the quantity of first bag is a plurality of, and a plurality of first bag distribute along the length direction equidistance of gas drainage pipe, and every first bag is gone up one side that is close to sealed pad and has all seted up first grout infiltration mouth, all is fixed the intercommunication on every first bag to have first slip casting pipe, and every first slip casting pipe passes a plurality of first bag, second bag and the sealed pad respectively in proper order and lies in outside the sealed pad.
Further, a first grout sealing sleeve is installed at one end, far away from the first bag, of the first grouting pipe; and a second grout sealing sleeve is installed at one end, far away from the second bag, of the second grouting pipe, and a third grout sealing sleeve is installed at one end, far away from the second bag, of the grout returning pipe.
Further, the use method of the hole sealing device for the mining borehole gas extraction collapse-proof hole comprises the following steps:
the method comprises the following steps: firstly, fixing a first bag communicated with a first grouting pipe and a second bag communicated with a second grouting pipe on a gas extraction pipe, wherein the distance between the first bag and the second bag is 5-10m; secondly, sleeving a pipe seam type sleeve on the gas extraction pipe, and arranging a slurry return pipe in the pipe seam type sleeve; finally, fixedly sleeving a sealing gasket on the gas extraction pipe, penetrating the first grouting pipe through the sealing gasket after penetrating through the second bag, respectively penetrating the second grouting pipe and the slurry return pipe through the sealing gasket, and sealing the penetrating position on the sealing gasket;
step two: in an initial state, the outer diameter of the pipe seam type sleeve is larger than the aperture of a drill hole, the pipe seam type sleeve is embedded into the drill hole under the action of external force, when the pipe seam type sleeve is embedded into the drill hole, strip-shaped through holes in the pipe seam type sleeve are reduced to enable the pipe seam type sleeve to deform, after the pipe seam type sleeve deforms, the outer wall of the pipe seam type sleeve is attached to the wall of the drill hole, then a gas extraction pipe with a first bag and a second bag penetrates through the pipe seam type sleeve and is inserted into the drill hole, and a sealing gasket is located outside the hole opening of the drill hole;
step three: sealing the position of the hole opening of the drilling hole by using a sealing gasket;
step four: grouting into the second bag through a second grouting pipe, fitting the second bag with a hole wall of a drilled hole after the second bag is filled with the grout, allowing the grout in the second bag to flow into the pipe seam type sleeve and the drilled hole between the pipe seam type sleeve and the second bag through a second grout permeation port after the second bag is filled with the grout, continuing grouting for a period of time after the grout flows out through a grout return pipe, sealing the second grouting pipe through a second grout sealing sleeve, and sealing the grout return pipe through a third grout sealing sleeve to complete primary hole sealing;
step five: through the slip casting of first slip casting pipe in to first bag, will laminate mutually with drilling hole wall after being full of the thick liquid in first bag, and after being full of the thick liquid in first bag, will form the slip casting space between first bag, second bag and the drilling, in the thick liquid in the first bag also will flow to the slip casting space through first grout infiltration mouth, after the thick liquid is full of the slip casting space, through first slip casting pipe of first grout cover closure, accomplish the hole sealing of second time.
Further, in the fourth step, when the slurry in the second pocket flows into the pipe seam type casing through the second slurry permeating port, the slurry can flow into the cracks around the wall of the drilled hole through the liquid permeating through holes.
Further, in the third step, when the sealing gasket seals the position of the hole opening of the drill hole, the sealing agent is used for sealing the hole opening of the drill hole, and the sealing gasket is tightly attached to the position of the hole opening of the drill hole for sealing.
By adopting the technical scheme, the invention has the beneficial effects that:
on the basis of the existing gas extraction pipe, the drilled hole is sealed through the first bag and the second bag, the opening position of the drilled hole can be sealed through the sealing gasket, the pipe seam type sleeve is sleeved on the gas extraction pipe, the outer diameter of the pipe seam type sleeve is larger than the hole diameter of the drilled hole in the initial state, the pipe seam type sleeve is embedded into the drilled hole under the action of external force, the pipe seam type sleeve deforms when being embedded into the drilled hole, and the outer wall of the pipe seam type sleeve is attached to the wall of the drilled hole after the deformation, so that radial supporting force can be provided for the wall of the drilled hole, and hole collapse of the drilled hole can be prevented; in addition, on the basis that the first bag and the second bag seal the drilled hole, the second slurry seepage port is formed in the second bag, so that slurry can be filled in the pipe seam type sleeve and the drilled hole between the pipe seam type sleeve and the second bag, not only can the cracks around the wall of the drilled hole be grouted, but also the drilled hole can be sealed, and therefore the sealing performance and safety of the drilled hole can be improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
fig. 2 is a schematic structural diagram of a part of the apparatus in fig. 1.
Reference numerals: 1. a gas extraction pipe; 2. a first pouch; 21. a first slurry permeating port; 3. a second pouch; 31. a second slurry permeating port; 4. a first grouting pipe; 41. a first sealing sleeve; 5. a second grouting pipe; 51. a second sealing sleeve; 6. a tube seam type sleeve; 61. strip-shaped through holes; 62. a weeping hole; 63. a tapered structure; 7. a gasket; 8. a pulp returning pipe; 81. a third sealing sleeve; 9. and (6) drilling.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the invention provides a hole sealing device for a mine drilled gas extraction collapse-proof hole, which comprises a gas extraction pipe 1, wherein the gas extraction pipe 1 comprises a head end and a tail end, a sealing gasket 7 made of a flexible sealing material is fixedly sleeved at the tail end of the gas extraction pipe 1, the gas extraction pipe 1 and the flexible sealing material are both in the prior art, and the sealing gasket 7 is used for sealing the position of an orifice of a drilled hole 9; the head end of the gas extraction pipe 1 is fixedly sleeved with a first bag 2, the first bag 2 is of a hollow elastic structure, the first bag 2 is fixedly communicated with a first grouting pipe 4 penetrating through a sealing gasket 7, the first grouting pipe 4 is used for grouting into the first bag 2, and after the first bag 2 is filled with grouting liquid and is spread, the grouting liquid can be tightly abutted against the wall of a drill hole 9 to seal the drill hole 9; a second bag 3 is fixedly sleeved on the gas extraction pipe 1 between the first bag 2 and the sealing gasket 7, the second bag 3 and the first bag 2 are arranged at intervals, the distance between the second bag 3 and the first bag 2 is 5-10m, and selection can be performed according to gas extraction drilling parameters, coal seam geological conditions and crack development degree around the hole wall of the drill hole 9; the second bag 3 is also of a hollow elastic structure, a second grouting pipe 5 penetrating through a sealing gasket 7 is fixedly communicated with the second bag 3, the second grouting pipe 5 is used for grouting into the second bag 3, and after the second bag 3 is filled with grouting liquid and is spread, the grouting liquid can be tightly abutted against the wall of the drill hole 9 to seal the drill hole 9; the first grouting pipe 4 is located outside the second bladder 3.
Further, a pipe seam type sleeve 6 is sleeved on the gas extraction pipe 1 located between the second bag 3 and the sealing gasket 7, the pipe seam type sleeve 6 is of a tubular structure with two open ends, a strip-shaped through hole 61 which is as long as the pipe seam type sleeve 6 is formed in the pipe seam type sleeve 6, one end, close to the sealing gasket 7, of the pipe seam type sleeve 6 is abutted to the sealing gasket 7, specifically, in an initial state, the outer diameter of the pipe seam type sleeve 6 is larger than the aperture of the drill hole 9, the pipe seam type sleeve 6 needs to be embedded into the drill hole 9 under the action of external force, the pipe seam type sleeve 6 deforms when being embedded into the drill hole 9, and the outer wall of the pipe seam type sleeve 6 is attached to the hole wall of the drill hole 9 after the deformation, so that radial supporting force can be provided for the hole wall of the drill hole 9, and hole collapse of the drill hole 9 can be prevented; secondly, a pulp return pipe 8 penetrating through a sealing gasket 7 is arranged in the pipe seam type sleeve 6, one end of the pulp return pipe 8 close to the second bag 3 is arranged at an interval with the second bag 3, and the distance between the end of the pulp return pipe 8 and the second bag 3 floats at 0.2 m; a second slurry seepage port 31 is formed in one side, close to the sealing gasket 7, of the second bag 3, specifically, after the second bag 3 is filled with slurry, the slurry can flow into the pipe seam type sleeve 6 and the drill hole 9 between the pipe seam type sleeve 6 and the second bag 3 through the second slurry seepage port 31, and the slurry is continuously injected for a period of time after flowing out through the slurry return pipe 8, so that the slurry can be filled into the pipe seam type sleeve 6 and the drill hole 9 between the pipe seam type sleeve 6 and the second bag 3, thus the cracks around the hole wall of the drill hole 9 can be injected, the drill hole 9 can be sealed again, and the sealing performance and the safety of the drill hole 9 can be improved; in addition, after the slurry is solidified, the borehole 9 can be prevented from collapsing; the second grouting pipe 5 and the first grouting pipe 4 respectively penetrate through the slotted sleeve 6.
On the basis of the existing gas extraction pipe 1, the drill hole 9 is sealed through the first bag 2 and the second bag 3, the position of the orifice of the drill hole 9 can be sealed through the sealing gasket 7, the pipe seam type sleeve 6 is sleeved on the gas extraction pipe 1, when the pipe seam type sleeve 6 is embedded into the drill hole 9, deformation is generated, the outer wall of the pipe seam type sleeve is attached to the hole wall of the drill hole 9 after the deformation is generated, so that radial supporting force can be provided for the hole wall of the drill hole 9, and hole collapse of the drill hole 9 can be prevented; in addition, on the basis that the first bag 2 and the second bag 3 seal the drill hole 9, the second slurry seepage port 31 is formed in the second bag 3, so that slurry can be filled in the pipe seam type sleeve 6 and the drill hole 9 between the pipe seam type sleeve 6 and the second bag 3, not only can the cracks around the hole wall of the drill hole 9 be grouted, but also the drill hole 9 can be sealed, and therefore the sealing performance and the safety of the drill hole 9 can be improved, and therefore when the bag is used for a long time, the sealing performance and the safety of the drill hole 9 can be guaranteed, and the drill hole 9 can be prevented from collapsing after the slurry is solidified.
Further, as shown in fig. 2, a plurality of weeping through holes 62 are formed in the outer wall of the end of the tube seam type sleeve 6 away from the sealing pad 7, specifically, the length of the tube seam type sleeve 6 is 2 to 3m, the length of the weeping through holes 62 formed in the tube seam type sleeve 6 is 1 to 1.5m, the length of the tube seam type sleeve 6 can be selected according to the development degree of cracks around the hole wall of the drill hole 9 and the stability of rock strata around the drill hole 9, when slurry flows into the tube seam type sleeve 6 in use, the slurry can penetrate into the cracks around the hole wall of the drill hole 9 at the position of the tube seam type sleeve 6 through the weeping through holes 62 to plug the cracks around the drill hole 9, and thus the better sealing effect on the drill hole 9 can be achieved.
In order to facilitate the insertion of the slit casing 6 into the bore hole 9, therefore, as shown in fig. 2, one end of the slit casing 6 away from the sealing gasket 7 is provided with a tapered structure 63, and the outer diameter of the tapered structure 63 away from one end of the sealing gasket 7 is smaller than that of the other end of the tapered structure 63, so that the insertion of the slit casing 6 into the bore hole 9 can be facilitated by providing the tapered structure 63.
Further, as shown in fig. 1, a first slurry permeating port 21 is formed in one side of the first bag 2 close to the sealing gasket 7, specifically, when the first bag 2 and the second bag 3 are spread apart in use, a slurry injecting space is formed between the first bag 2 and the drill hole 9, so that slurry can flow into the slurry injecting space through the first slurry permeating port 21 after the first bag 2 is filled with the slurry, and thus, a crack around the hole wall of the drill hole 9 at the position can be injected, and the drill hole 9 can be sealed again, so that the sealing performance and the safety of the drill hole 9 can be improved; further, the borehole 9 can be prevented from collapsing when the slurry is solidified.
Further, the quantity of first bag 2 is a plurality of, a plurality of first bag 2 are along the length direction equidistance distribution of gas drainage pipe 1, and first grout mouth 21 has all been seted up to one side that is close to sealed pad 7 on every first bag 2, all fixed intercommunication has first slip casting pipe 4 on every first bag 2, every first slip casting pipe 4 passes a plurality of first bag 2 respectively in proper order, second bag 3 is located outside sealed pad 7 with sealed pad 7 after, specifically, can confirm the quantity of first bag 2 according to the hole depth of drilling 9 and the crack development degree around the drilling 9 pore wall, in order to carry out hole sealing many times to drilling 9, thereby can improve the sealing performance to drilling 9, and a plurality of first bag 2 are in the in-process that uses, use in proper order along the shallow position of drilling 9 to the deep position of drilling 9.
Further, as shown in fig. 1, a first grout sleeve 41 is installed at one end of the first grouting pipe 4 far away from the first bladder 2, and the first grout sleeve 41 is used for sealing the first grouting pipe 4; a second grout sealing sleeve 51 is arranged at one end of the second grout pipe 5 far away from the second bag 3, and the second grout sealing sleeve 51 is used for sealing the second grout pipe 5; and a third grout sealing sleeve 81 is arranged at one end of the grout returning pipe 8 far away from the second bladder 3, and the third grout sealing sleeve 81 is used for sealing the grout returning pipe 8.
Further, the use method of the hole sealing device for the mining borehole gas extraction collapse-proof hole comprises the following steps:
the method comprises the following steps: firstly, fixing a first bag 2 communicated with a first grouting pipe 4 and a second bag 3 communicated with a second grouting pipe 5 on a gas extraction pipe 1, wherein the distance between the first bag 2 and the second bag 3 is 5-10m, and the distance can be selected according to the gas extraction drilling parameters, the coal bed geological conditions and the crack development degree around the hole wall of a drill hole 9 which are measured in advance; secondly, sleeving a pipe seam type sleeve 6 on the gas extraction pipe 1, and arranging a slurry return pipe 8 in the pipe seam type sleeve 6; finally, fixedly sleeving a sealing gasket 7 on the gas extraction pipe 1, penetrating the first grouting pipe 4 through the second bag 3 and then penetrating the sealing gasket 7, respectively penetrating the second grouting pipe 5 and the slurry return pipe 8 through the sealing gasket 7, and sealing the penetrating position on the sealing gasket 7 to complete the assembly of the hole sealing device;
step two: after the hole sealing device is assembled, in an initial state, the outer diameter of the pipe seam type sleeve 6 is larger than the aperture of the drill hole 9, the pipe seam type sleeve 6 needs to be embedded into the drill hole 9 under the action of external force, when the pipe seam type sleeve 6 is embedded into the drill hole 9, the strip-shaped through hole 61 in the pipe seam type sleeve 6 is reduced to enable the pipe seam type sleeve 6 to deform, the outer wall of the pipe seam type sleeve 6 is attached to the hole wall of the drill hole 9 after being deformed, then the gas extraction pipe 1 with the first bag 2 and the second bag 3 penetrates through the pipe seam type sleeve 6 and is inserted into the drill hole 9, the sealing gasket 7 is located outside the hole opening of the drill hole 9, and the installation of the gas extraction pipe 1 is completed;
step three: after the gas extraction pipe 1 is installed, sealing the hole opening position of the drill hole 9 by using the sealing gasket 7 to seal the hole opening position of the drill hole 9;
step four: when the opening position of the drill hole 9 is sealed, grouting into the second bag 3 through the second grouting pipe 5; after the second bag 3 is filled with the grout, the second bag is attached to the hole wall of the drill hole 9, and after the second bag 3 is filled with the grout, the grout in the second bag 3 flows into the pipe seam type sleeve 6 and the drill hole 9 between the pipe seam type sleeve 6 and the second bag 3 through the second grout penetration port 31 until the grout flows out through the grout return pipe 8 and then continues to be injected for a period of time, then the second grouting pipe 5 is sealed through the second grout sealing sleeve 51, the grout return pipe 8 is sealed through the third grout sealing sleeve 81, and the first hole sealing is completed, at this time, as the grout is filled in the pipe seam type sleeve 6 and the drill hole 9 between the pipe seam type sleeve 6 and the second bag 3, the cracks around the hole wall of the drill hole 9 can be injected, the drill hole 9 can be sealed again, and therefore the sealing performance and the safety of the drill hole 9 can be improved; in addition, when the slurry is solidified, the borehole 9 can be prevented from collapsing;
step five: after the first hole sealing is finished, grouting is performed to the first bag 2 through the first grouting pipe 4, the first bag 2 is attached to the wall of the drill hole 9 after being filled with slurry, grouting spaces are formed among the first bag 2, the second bag 3 and the drill hole 9 after the first bag 2 is filled with slurry, the slurry in the first bag 2 flows into the grouting spaces through the first grouting ports 21, and the first grouting pipe 4 is sealed through the first grouting sleeve 41 after the grouting spaces are filled with slurry to finish the second hole sealing, so that the cracks around the drill hole 9 at the position can be grouted and the drill hole 9 can be sealed again because the slurry is filled into the grouting spaces, and the sealing performance and the safety of the drill hole 9 can be improved; in addition, when the slurry is solidified, the borehole 9 can be prevented from collapsing; in addition, after the first hole sealing is finished, secondary hole sealing can be performed after the slurry used in the first hole sealing is solidified, gas extraction operation can also be performed firstly, and secondary hole sealing is performed on the drill hole 9 after a period of time of gas extraction, so that the gas extraction yield can be improved.
Further, in the fourth step, when the slurry in the second bag 3 flows into the slit-type casing 6 through the second slurry permeating hole 31, the slurry can flow into the cracks around the hole wall of the drilled hole 9 through the liquid permeating through holes 62, and at this time, the cracks around the hole wall of the drilled hole 9 at the position of the slit-type casing 6 will be tightly sealed, so as to improve the sealing performance to the drilled hole 9, and the drilled hole 9 can be prevented from collapsing after the slurry is solidified.
Further, in the third step, when the sealing gasket 7 seals the opening position of the drill hole 9, the opening of the drill hole 9 is sealed with a plugging agent, and the sealing gasket 7 is sealed by being closely attached to the opening position of the drill hole 9.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents.
Claims (9)
1. The utility model provides a hole sealing device of mining drilling gas drainage hole of collapsing, includes the gas drainage pipe, the gas drainage pipe includes head end and tail end, its characterized in that: the tail end of the gas extraction pipe is fixedly sleeved with a sealing gasket made of a flexible sealing material, the head end of the gas extraction pipe is fixedly sleeved with a first bag, the first bag is of a hollow elastic structure, the first bag is fixedly communicated with a first grouting pipe penetrating through the sealing gasket, a second bag is fixedly sleeved on the gas extraction pipe between the first bag and the sealing gasket, the second bag and the first bag are arranged at intervals, the second bag is also of a hollow elastic structure, the second bag is fixedly communicated with a second grouting pipe penetrating through the sealing gasket, and the first grouting pipe is positioned outside the second bag;
the gas extraction pipe between the second bag and the sealing gasket is sleeved with a pipe seam type sleeve, the pipe seam type sleeve is of a tubular structure with two ends open, a strip-shaped through hole which is as long as the pipe seam type sleeve is formed in the pipe seam type sleeve, one end, close to the sealing gasket, of the pipe seam type sleeve is abutted to the sealing gasket, a slurry return pipe penetrating through the sealing gasket is arranged in the pipe seam type sleeve, one end, close to the second bag, of the slurry return pipe is arranged at an interval with the second bag, a second slurry seepage port is formed in one side, close to the sealing gasket, of the second bag, and the second slurry injection pipe and the first slurry injection pipe penetrate through the pipe seam type sleeve respectively.
2. The hole sealing device for the mining borehole gas extraction collapse-proof hole according to claim 1, characterized in that: and a plurality of liquid seepage through holes are formed in the outer wall of one end, away from the sealing gasket, of the pipe seam type sleeve.
3. The hole sealing device for the mining borehole gas extraction collapse-proof hole according to claim 2, characterized in that: the one end that sealed pad was kept away from to the tube slot formula sleeve pipe sets up to the toper structure, the external diameter that sealed pad one end was kept away from to the toper structure is less than the external diameter of the toper structure other end.
4. The hole sealing device for the mining borehole gas extraction collapse-proof hole according to claim 2, characterized in that: a first slurry permeating opening is formed in one side, close to the sealing gasket, of the first bag.
5. The hole sealing device for the mining drill hole gas extraction collapse-proof hole according to claim 4, characterized in that: the quantity of first bag is a plurality of, and a plurality of first bag distribute along the length direction equidistance of gas drainage pipe, and every first bag is gone up one side that is close to sealed pad and has all seted up first grout infiltration mouth, all is fixed the intercommunication on every first bag and has had first slip casting pipe, and every first slip casting pipe passes a plurality of first bags, second bag and the sealing pad in proper order respectively and lies in outside the sealed pad.
6. The hole sealing device for the mining borehole gas extraction collapse-proof hole according to claim 4, characterized in that: a first grout sealing sleeve is arranged at one end, far away from the first bag, of the first grouting pipe; and a second grout sealing sleeve is installed at one end, far away from the second bag, of the second grouting pipe, and a third grout sealing sleeve is installed at one end, far away from the second bag, of the grout returning pipe.
7. The use method of the hole sealing device for the mining drilled hole gas extraction collapse-proof hole, according to claim 6, is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: firstly, fixing a first bag communicated with a first grouting pipe and a second bag communicated with a second grouting pipe on a gas extraction pipe, wherein the distance between the first bag and the second bag is 5-10m; secondly, sleeving a pipe seam type sleeve on the gas extraction pipe, and arranging a slurry return pipe in the pipe seam type sleeve; finally, fixedly sleeving a sealing gasket on the gas extraction pipe, penetrating the first grouting pipe through the sealing gasket after penetrating through the second bag, respectively penetrating the second grouting pipe and the slurry return pipe through the sealing gasket, and sealing the penetrating position on the sealing gasket;
step two: in an initial state, the outer diameter of the pipe seam type sleeve is larger than the aperture of a drill hole, the pipe seam type sleeve is embedded into the drill hole under the action of external force, when the pipe seam type sleeve is embedded into the drill hole, strip-shaped through holes in the pipe seam type sleeve are reduced to enable the pipe seam type sleeve to deform, after the pipe seam type sleeve deforms, the outer wall of the pipe seam type sleeve is attached to the wall of the drill hole, then a gas extraction pipe with a first bag and a second bag penetrates through the pipe seam type sleeve and is inserted into the drill hole, and a sealing gasket is located outside the hole opening of the drill hole;
step three: sealing the position of the hole opening of the drilling hole by using a sealing gasket;
step four: grouting into the second bag through a second grouting pipe, fitting the second bag with a hole wall of a drilled hole after the second bag is filled with the grout, allowing the grout in the second bag to flow into the pipe seam type sleeve and the drilled hole between the pipe seam type sleeve and the second bag through a second grout permeation port after the second bag is filled with the grout, continuing grouting for a period of time after the grout flows out through a grout return pipe, sealing the second grouting pipe through a second grout sealing sleeve, and sealing the grout return pipe through a third grout sealing sleeve to complete primary hole sealing;
step five: grouting into the first bag through a first grouting pipe; after the first bag is filled with the grout, the first bag is attached to a hole wall of the drilling hole, after the first bag is filled with the grout, a grouting space is formed among the first bag, the second bag and the drilling hole, the grout in the first bag flows into the grouting space through the first grout seepage port, and after the grouting space is filled with the grout, the first grouting pipe is sealed through the first grout sealing sleeve, so that the second hole sealing is completed.
8. The use method of the hole sealing device for the mining borehole gas extraction collapse-proof hole according to claim 7 is characterized in that: in the fourth step, when the slurry in the second pocket flows into the pipe seam type casing through the second slurry permeating port, the slurry can flow into the cracks around the wall of the drilled hole through the liquid permeating through holes.
9. The use method of the hole sealing device for the mining borehole gas extraction collapse-proof hole according to claim 7 is characterized in that: in the third step, when the sealing gasket seals the hole opening position of the drilled hole, the sealing agent is used for sealing the hole opening of the drilled hole, and the sealing gasket is tightly attached to the hole opening position of the drilled hole for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310045712.4A CN115898321A (en) | 2023-01-30 | 2023-01-30 | Hole sealing device for mining drilled gas extraction anti-collapse hole and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310045712.4A CN115898321A (en) | 2023-01-30 | 2023-01-30 | Hole sealing device for mining drilled gas extraction anti-collapse hole and using method thereof |
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| CN115898321A true CN115898321A (en) | 2023-04-04 |
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| CN202310045712.4A Pending CN115898321A (en) | 2023-01-30 | 2023-01-30 | Hole sealing device for mining drilled gas extraction anti-collapse hole and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117780298A (en) * | 2024-02-23 | 2024-03-29 | 太原理工大学 | Integrated hole sealing extraction device and method embedded with grouting channel and bag |
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- 2023-01-30 CN CN202310045712.4A patent/CN115898321A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117780298A (en) * | 2024-02-23 | 2024-03-29 | 太原理工大学 | Integrated hole sealing extraction device and method embedded with grouting channel and bag |
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