CN212774391U - Gas drainage device in coal mine tunnel and grouting part thereof - Google Patents
Gas drainage device in coal mine tunnel and grouting part thereof Download PDFInfo
- Publication number
- CN212774391U CN212774391U CN202021044219.9U CN202021044219U CN212774391U CN 212774391 U CN212774391 U CN 212774391U CN 202021044219 U CN202021044219 U CN 202021044219U CN 212774391 U CN212774391 U CN 212774391U
- Authority
- CN
- China
- Prior art keywords
- hole
- extraction
- sealing pipe
- hole sealing
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model provides a gas extraction device in a coal mine tunnel and a grouting part thereof, wherein the extraction device comprises a hole sealing pipe extraction unit and a plugging agent packing unit; the plugging agent packing unit is of a hollow structure, the orifice of the extraction hole is sealed, and the hole sealing pipe extraction unit penetrates through the hollow part of the plugging agent packing unit; one end of the hole sealing pipe extraction unit is arranged in the extraction hole, and the other end of the hole sealing pipe extraction unit is positioned at the position of the hole of the roadway extraction hole; the extraction holes are drilled from the coal wall along the direction of the coal bed (13). The utility model discloses take out and adopt the device and implement according to the engineering to the hole of taking out and adopting in advance of not drilling, the device is under construction in no sheathed tube tunnel (14), and it is effectual to have the hole sealing of taking out and adopt, has improved colliery gas and has taken out and adopt concentration, satisfies the engineering requirement.
Description
Technical Field
The utility model relates to a coal mine tunnel gas drainage field, concretely relates to coal mine tunnel interior gas drainage device and slip casting part thereof.
Background
In order to ensure the production safety of coal mines, gas in a coal seam needs to be discharged before coal mining so as to reach the safety production standard, and the concentration of the gas extracted by the conventional gas extraction device and process is very low, so that the gas cannot be directly used as unconventional natural gas. Therefore, coal mines are always dedicated to searching for new devices, new processes and new methods for improving the gas extraction concentration. At present, the coal mine gas treatment mainly adopts an underground drainage mode. The underground pumping and drainage adopts horizontal drilling on the coal wall of a coal bed, and usually adopts normal pressure drilling and negative pressure pumping and drainage. At present, the extraction quantity of a plurality of mine gas is not up to the standard, and the reason is that besides the improper selection of the coal seam gas extraction method, the drilling and hole sealing effect of the gas extraction cannot meet the engineering requirement, and the improvement of the drilling and hole sealing effect is one of the keys of the coal seam gas extraction.
The prior drilling and sealing engineering has the following defects: the quality of the coal bed gas extraction drill hole sealing is difficult to meet the requirement of the drill hole sealing performance; the extraction negative pressure is low; the gas concentration is smaller. Therefore, the gas extraction device in the coal mine roadway can be provided from the research and development of mechanical devices, and the problems are solved.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a gas extraction device in a coal mine tunnel, which is improved in that the device comprises a hole sealing pipe extraction unit and a plugging agent packing unit;
the plugging agent packing unit is of a hollow structure, the orifice of the extraction hole is sealed, and the hole sealing pipe extraction unit penetrates through the hollow part of the plugging agent packing unit;
one end of the hole sealing pipe extraction unit is arranged in the extraction hole, and the other end of the hole sealing pipe extraction unit is positioned at the position of an extraction hole opening of the roadway 14;
the extraction holes are drilled from the coal wall along the direction of the coal bed 13.
Preferably, the hole sealing pipe extraction unit comprises a hole sealing pipe 8, the hole sealing pipe 8 is arranged in the center of an extraction hole channel, the hole sealing pipe 8 is a section of straight pipe, the length of the straight pipe is smaller than that of an extraction hole drilled by drilling, and an annular space between the outer wall and the extraction hole is used for pumping plugging agent.
Preferably, the blocking agent packing unit comprises a packer 11, the packer 11 is installed at one end of an extraction hole orifice of the hole sealing pipe 8 and is of an annular closed capsule-shaped rubber barrel structure, the outer wall of the annular closed capsule-shaped rubber barrel structure is an annular rubber sheet, and the narrow-ring outer wall of the annular rubber sheet is sleeved on the large-ring outer wall of the hole sealing pipe 8 and is tightly attached to a coal bed (13) on the inner wall of the extraction hole.
Preferably, the packer 11 is provided with a small pressurizing hole, a pressurizing valve joint is arranged at the small hole, when the hole sealing pipe 8 is used for extraction, an external pressurizer is used for pressurizing and filling high-pressure gas, a bag-shaped rubber cylinder is pressurized and expanded, the rubber cylinder is filled with gas and expanded, and the annular rubber cylinder packer 11 is used for sealing an annular space between the outer wall of the hole sealing pipe 8 and a coal bed (13) on the inner wall of the extraction hole.
Preferably, the valve joint pressurized by the packer 11 is externally connected with a high-pressure output interface end of a pressurizer.
Preferably, the blocking agent packing unit comprises a sealing layer, the sealing layer fills and wraps an annular space between the outer wall of the hole sealing pipe 8 and a coal seam (13) on the inner wall of the extraction hole, and the sealing layer is formed by grouting of the blocking agent.
Preferably, the hole sealing pipe extraction unit further comprises a plurality of centralizers 9, each centralizer 9 is of an annular sleeve structure and is sleeved outside the hole sealing pipe 8, the claws of the centralizers 9 are fixed on the sealing layer, the centers of the lantern rings of the centralizers 9 are distributed on the hole sealing pipe 8, and the hole sealing pipe 8 is coaxial with the extraction hole.
Preferably, the hole sealing pipe extraction unit further comprises a hole sealing pipe coupling 12, the hole sealing pipe coupling 12 is connected to one end, located at the orifice of the extraction hole, of the hole sealing pipe 8, and the hole sealing pipe coupling 12 is of an annular sealing structure and forms an external interface of the hole sealing pipe 8.
The utility model discloses in still provide a gas drainage device's slip casting part in coal mine tunnel, its improvement part lies in, include: a hole sealing pipe 8, a check valve 10 and external grouting equipment;
the hole sealing pipe 8 is a cylindrical pipeline, and two ends of the pipeline are in an open structure;
the check valve 10 is connected with one end of the hole sealing pipe 8, which is positioned in the extraction hole, and the other end of the hole sealing pipe 8 is connected with external grouting equipment at the hole opening of the extraction hole.
Preferably, the check valve 10 is a hemispherical protrusion, a small hole is arranged at the edge of the protrusion, and the one-way direction of the protrusion is from the inside of the hole sealing pipe 8 to the outside of the hole sealing pipe 8;
after the grouting stage is finished and the grouting is solidified, the outer wall of the hole sealing pipe 8 and the annular space of the coal seam (13) of the extraction hole form a sealing layer structure.
Compared with the closest prior art, the utility model discloses the beneficial effect who has as follows:
1. the utility model provides a gas drainage device in coal mine tunnel, include: the hole sealing pipe extraction unit and the plugging agent packing unit; the plugging agent packing unit is of a hollow structure, the orifice of the extraction hole is sealed, and the hole sealing pipe extraction unit penetrates through the hollow part of the plugging agent packing unit; one end of the hole sealing pipe extraction unit is arranged in the extraction hole, and the other end of the hole sealing pipe extraction unit is positioned at the position of an extraction hole opening of the roadway 14; the extraction holes are obtained by drilling from the coal wall along the coal bed direction. The utility model discloses take out and adopt the device and implement according to the engineering to the hole of taking out and adopting in advance of not drilling, the device is under construction in no sheathed tube tunnel, and it is effectual to have the hole sealing of taking out and adopt, has improved colliery gas and has taken out and adopt concentration, satisfies the engineering requirement.
2. The utility model discloses the device has gas drainage concentration height in the coal mine tunnel, has impeld the development of high concentration gas as unconventional natural gas, very big improvement coal mine gas exploitation efficiency, further promotes the safety of production, has protected the environment.
3. The utility model discloses the device still provides one kind to having the sheathed tube and having carried out the device in the drainage hole of conventional hole sealing and production, and the device overcomes the influence of conventional sheathed tube before, and the engineering is implemented the process technology again and is ripe, and the effect that improves gas drainage concentration in the coal mine tunnel is also very obvious.
4. The device of the utility model has the advantages of simple structure, convenient construction, low cost, prominent practical value and good popularization value.
5. The utility model discloses the popularization and implementation and the application of device will produce good economic benefits and social.
Drawings
FIG. 1 is a schematic view of a gas extraction device in a coal mine tunnel
FIG. 2 is a schematic diagram of a grouting component of a coal mine roadway extraction device;
FIG. 3 is a schematic view of a second apparatus for use in conventionally sealed and produced extraction holes;
the reference numbers illustrate:
1-a sleeve; 2-a liner tube; 31-a first annular rubber cylinder; 32-a second annular rubber cylinder; 4-grouting valve; 5-a steel pipe; 6-high pressure inflation hose; 7-high pressure air bag; 8-hole sealing pipe; 9-a centralizer; 10-a check valve; 11-a packer; 12-hole sealing pipe coupling; 13-coal seam; and (4) a roadway.
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings.
The utility model also provides a gas extraction device in the coal mine tunnel, as shown in figure 1, comprising a hole sealing pipe extraction unit and a plugging agent packing unit; the plugging agent packing unit is of a hollow structure, the orifice of the extraction hole is sealed by the plugging agent packing unit, and the hole sealing pipe extraction unit penetrates through the hollow part of the plugging agent packing unit; one end of the hole sealing pipe extraction unit is arranged in the extraction hole, and the other end of the hole sealing pipe extraction unit is positioned at the position of an extraction hole opening of the roadway 14; the device is used for extracting gas in an extraction hole which is not extracted, and the extraction hole is obtained by drilling from the coal wall along the trend of the coal bed 13.
The utility model discloses in, the unit is taken out and is adopted to the hole sealing pipe includes hole sealing pipe 8, hole sealing pipe 8 is arranged in and is taken out the center of taking out the hole passageway, hole sealing pipe 8 is one section straight tube, and length is less than the boring take out and takes out hole length, and the annular space between outer wall and the hole of taking out is used for the pump to go into the blocking agent, and the blocking agent is sealed to form the sealing layer after the annular region internal consolidation.
The utility model discloses in, the packer unit includes packer 11, and annular packer 11 is installed in hole sealing pipe 8 and is taken out hole drill way mouth one end, and for annular sealing saccular packing element block structure, its outer wall is annular telescopic annular rubber, and the narrow circle surface cover of annular rubber is arranged in hole sealing pipe 8 outer wall, and the downthehole wall coal seam 13 is taken out and taken out in the subsides of saccular annular packing element large circle outer wall, and packer 11 is used for the shutoff to take out and takes out the annular space between hole drill way mouth and the hole sealing pipe 8.
The utility model discloses in, the capsule packing element block structure of packer 11 is last to have the pressurization aperture, and pressurized valve joint is installed to the aperture, and when sealing hole pipe 8 and being in when taking out the adopts, external presser pressurization fills high-pressure gas, and pressurization inflation capsule, the inflation in the packing element, annular packing element packer 11 sit seal hole pipe 8 outer walls and take out and adopt annular space between the downthehole wall coal seam 13 to isolated outside the hole air of taking out adopts.
Further, the valve joint for pressurizing the packer 11 is externally connected with a high-pressure output interface end of a pressurizer so as to inflate the high-pressure bladder rubber sleeve.
The utility model discloses in, blocking agent packing unit includes the sealing layer, and the sealing layer forms after solidifying by slip casting agent slip casting, and the sealing layer fills and wraps up 8 outer walls of hole-sealing pipe and takes out the annular space between the downthehole wall coal seam 13, and sealing layer blocking agent grout constitutes, and the sealing layer is used for consolidating the coal wall crack, consolidates coal seam 13 and prevents to take out in the coal seam 13 that the hole collapses, sinks.
The utility model discloses in, the hole sealing pipe is taken out and is adopted the unit and still include a plurality of centralizer 9, and every centralizer 9 is the annular tube structure, cup joints at hole sealing pipe 8 outer walls to on the paws of centralizer 9 are fixed in the sealing layer, and made every centralizer 9 lantern ring centers according to certain interval equidistant distribution on hole sealing pipe 8, hole sealing pipe 8 with take out and adopt the hole coaxial. During gas extraction, the centralizer 9 is used for centralizing the hole sealing pipe 8 to enable the hole sealing pipe to be centered in an extraction hole, and the hole sealing pipe 8 is prevented from slipping off a sealing layer when the extraction hole collapses or collapses.
The utility model discloses in, hole sealing pipe takes out and adopts the unit still includes hole sealing pipe coupling 12, and hole sealing pipe coupling 12 is connected and is being located to take out and adopt hole drill way one end at hole sealing pipe 8, and hole sealing pipe coupling 12 is annular enclosed construction, constitutes the external tapping of hole sealing pipe 8 for with the sealing connection of external tapping, external negative pressure takes out and adopts equipment to take out and adopt high concentration gas.
After the secondary drilling is carried out, the gas extraction device in the coal mine tunnel 14 can carry out gas extraction operation.
The utility model discloses in, the process that adopts slip casting part and take out the device to be used for not taking out the gas drainage hole in advance of drilling does:
step 1, drilling an extraction hole with a length suitable for a first device from the coal wall to the depth of a coal seam 13 along the distribution trend of the coal seam 13 in a drilling field.
And 2, putting a first device with a proper length into the drilled extraction hole according to the length of the drilled hole. The pressure sets the packer 11 on the orifice packing tube 8.
The material of the hole sealing pipe 8 can be a steel pipe, a PVC pipe, a glass fiber reinforced plastic pipe or other suitable pipes according to requirements, and is more preferably a steel pipe.
And 3, pumping a proper amount of plugging agent into the hole sealing pipe 8, wherein the plugging agent fills the whole closed space between the outside of the hole sealing pipe 8 and the coal seam 13 through the check valve 10 along the hole sealing pipe 8 until the plugging agent permeates into and seals the hole wall coal body disturbance microcracks under the action of a large osmotic pressure gradient. And (4) continuously pumping a proper amount of clear water to completely replace the plugging agent out of the hole sealing pipe 8, waiting for solidification, and sealing the annular space outside the hole sealing pipe 8 after the plugging agent is solidified.
The amount of the plugging agent and the clear water pumped in is calculated by the length and the radius of the drill hole and the length, the inner diameter and the outer diameter of the hole sealing pipe.
The blocking agent may be a cement slurry or other chemical agent, preferably a cement slurry.
And 4, after hole fixing, continuing to drill a certain distance forwards in the self-hole-sealing pipe 8 (the distance is suitable for drilling into the coal seam 13), and externally connecting a negative pressure gas extraction pipe 8 with the hole-sealing pipe coupling 12.
The utility model discloses in, the device shutoff concreties and takes out and take out hole effect ideal, has completely cut off the air and has sneaked into, and the gas concentration of taking out adopts concentration far away from traditional gas to take out and take out concentration, has improved the gas in the improvement coal mine tunnel and has adopted concentration.
The utility model provides a colliery tunnel takes out slip casting part of adopting device, as shown in fig. 2, include: a hole sealing pipe 8, a check valve 10 and external grouting equipment. The hole sealing pipe 8 is a hollow cylindrical pipeline, two ends of the pipeline are of an open structure, and the hole sealing pipe 8 is fixed in the middle height position of the extraction hole. The check valve 10 is connected with one end of the hole sealing pipe 8, which is positioned in the extraction hole, and seals the opening of the hole sealing pipe 8, the other end of the hole sealing pipe is connected with external grouting equipment at the hole opening of the extraction hole, and the external grouting equipment is used for injecting plugging agent into the hole sealing pipe 8.
The check valve 10 is a hemispherical bulge, a small hole is formed in the edge of the bulge, and the one-way direction of the check valve is from the inside of the hole sealing pipe 8 to the outside of the hole sealing pipe 8; when grouting is carried out in the hole sealing pipe 8, the plugging agent flows into an annular space outside the hole sealing pipe 8 in a one-way mode through the check valve 10, and the space outside the hole sealing pipe 8 is sealed to form a sealing layer structure. The plugging agent can split and expand coal body cracks in the outer hole wall of the hole sealing pipe 8 under the action of grouting pressure, pores and coal body concave-convex surfaces are filled, the plugging agent is injected into the hole wall coal body disturbance cracks around the gas extraction drill hole in a pressing mode and permeates into coal body micro cracks under the action of large osmotic pressure gradient, and the plugging agent and coal body particle solids are bonded together to enable the plugging agent to be thoroughly sealed so as to prevent air from entering a channel. After the grouting stage is finished and the grouting is solidified, the outer wall of the hole sealing pipe 8 and the annular space of the coal seam 13 of the extraction hole form a sealing layer structure.
The utility model discloses in, the slip casting part forms the sealing layer structure back outside hole sealing pipe 8, takes out through follow-up gas drainage device implementation gas through taking out in the coal mine tunnel, forms the earlier stage work that the sealing layer structure was taken out for gas drainage promptly. Before gas extraction, secondary drilling of an extraction hole is required, a sealing layer formed in front of the check valve 10 and the check valve 10 is drilled through, the sealing layer in front of the check valve 10 and the check valve 10 is broken, and the hole sealing pipe 8 forms a solidified gas extraction channel.
The utility model discloses in, above-mentioned device is used for the process of the pre-drainage hole of not drilling, to the drainage of the drainage hole of having carried out conventional hole sealing and production, the inventor provides the second device.
As shown in fig. 3, the second device comprises a cast-in-place ring barrel-shaped closed unit, the ring barrel-shaped closed unit is inserted into the extraction hole, one end of the ring barrel-shaped closed unit is closed with the annular casing 1 at the extraction hole opening of the roadway 14, the other end of the ring barrel-shaped closed unit extends into the extraction hole opening of the roadway 14, the depth length of the ring barrel-shaped closed unit is larger than that of the casing 1, and the ring barrel-shaped closed unit is closed with the annular coal; and filling a plugging agent into the closed space in the barrel-shaped closed unit, and sealing the extraction holes of the barrel-shaped closed unit section by using the sealing ring after the plugging agent is solidified.
The cast-in-situ ring barrel-shaped closed unit comprises a hollow annular liner tube 2 and an annular rubber cylinder; the liner tube 2 extends into the casing 1 of the extraction hole, and the extending depth is greater than the depth of the casing 1; the annular rubber cylinder sealing unit comprises a hollow annular liner tube 2 and an annular rubber cylinder, and the annular rubber cylinder comprises a first annular rubber cylinder 31 and a second annular rubber cylinder 32 which are respectively connected to two ends of the outer wall of the annular liner tube 2;
in the second device, a first annular rubber cylinder 31 and a second annular rubber cylinder 32 are respectively arranged at two ends of the liner tube 2; the first annular rubber cylinder 31 blocks an annular space between the liner tube 2 and the casing 1 at the orifice of the extraction hole, the first annular rubber cylinder 31 and the liner tube 2 can be further connected in a sealing manner by using hole sealing glue, and a reserved circular grouting opening is arranged above the orifice of the liner tube 2 in the first annular rubber cylinder 31; the annular space between the liner tube 2 and the coal seam 13 is sealed and sealed by the second annular rubber cylinder 32, the second annular rubber cylinder 32 and the liner tube 2 can be further connected in a sealing mode by hole sealing glue, the thickness of the second annular rubber cylinder 32 is larger than that of the first annular rubber cylinder 31, and the radius of the circular ring is also larger than that of the first annular rubber cylinder 31.
In the second device, a first annular rubber cylinder 31 and a second annular rubber cylinder 32 seal an annular space between the outer wall of the liner tube 2 and the extraction hole to form a closed area for pumping plugging agent into the closed area.
In the second device, the liner pipe 2 can be a PVC pipe with the outer diameter of 73mm, and the length of the liner pipe 2 exceeds the length of the original extraction hole casing 1, and is preferably more than 20 m. The liner tube 2 is externally connected with a low-pressure pump to extract high-concentration gas in the extraction hole after consolidation and sealing.
In the second device, the annular packing element sealing unit further comprises a grouting valve 4, a grouting opening is reserved in the first annular packing element 31, the grouting valve 4 penetrates through the grouting opening, and the insertion end extends into an annular sealing area between the first annular packing element 31 and the second annular packing element 32 and is used for injecting a plugging agent into the annular sealing area between the first annular packing element 31 and the second annular packing element 32. The purpose of pumping the plugging agent is not only to plug the annular space outside the liner tube 2, but more importantly, the plugging agent is injected into the coal body disturbance crack on the wall of the hole around the gas extraction drill hole under the pressure action, and the plugging agent can split and expand the coal body crack in the wall of the hole under the action of the grouting pressure, fill the hole and the concave-convex surface of the coal body, penetrate into the coal body micro crack under the action of the large osmotic pressure gradient and bond with the coal body particle solid, so that the air inlet channel is thoroughly sealed. The blocking agent can be cement paste or other chemical agents and the like.
The second device also comprises a high-pressure air bag sealing unit which comprises a hollow steel pipe 5 and a high-pressure sealing component; the steel pipe 5 is inserted into the liner pipe 2, and the insertion depth is greater than that of the liner pipe 2; the high-pressure sealing assembly is connected with the tail end of the steel pipe 5 to seal the extraction hole at the tail end of the steel pipe 5.
In the second device, the high-pressure sealing assembly comprises a high-pressure inflating hose 6 and a high-pressure air bag 7, the high-pressure air bag 7 is fixed at one end, extending into the extraction hole, of the steel pipe 5, the high-pressure air bag 7 is connected with the high-pressure inflating hose 6, the high-pressure inflating hose 6 penetrates through the steel pipe 5, and the high-pressure air bag 7 is inflated to expand and seal the extraction hole behind the liner pipe 2.
In the second device, the length of the steel pipe 5 is greater than the length of the liner pipe 2.
In the second device, one end of the steel pipe 5 extending into the extraction hole is provided with a hole for injecting water into the space between the high-pressure air bag 7 and the second annular rubber cylinder 32, and the unsealed area is cleaned by injecting running water.
The process of the second device for the extraction hole which is subjected to conventional hole sealing and is produced is as follows:
step 1, pushing a liner tube 2, such as a PVC liner tube with the outer diameter of 73mm, into the original extraction hole, wherein the pushing depth of the liner tube 2 exceeds the depth of the casing 1 of the original extraction hole. The annular space of the liner pipe 2 and the annular space of the casing pipe 1 at the orifice of the extraction hole are sealed through an annular first annular rubber cylinder 31, a grouting opening is reserved in the annular first annular rubber cylinder 31, a grouting valve 4 is installed at the grouting opening, and plugging agent can be pumped into the annular space at the outer wall of the liner pipe 2 by opening the grouting valve 4.
The utility model discloses in, the blocking agent can be grout or other chemical agent etc..
And 2, sealing an annular space between the liner tube 2 and the coal seam 13 by using an annular second annular rubber cylinder 32 and hole sealing glue at a position exceeding the original casing 1 and between the liner tube 2 and the extraction hole, wherein the distance from the annular second annular rubber cylinder 32 to the hole opening of the extraction hole is not less than 20 m.
And 3, pushing a steel pipe 5 (such as a 48mm steel pipe) with a hole at the top into the liner pipe 2, wherein the steel pipe 5 extends into an extraction hole, the top end of the steel pipe is fixedly provided with a high-pressure air bag 7, the high-pressure air bag 7 is connected with a high-pressure inflating hose 6, and the high-pressure inflating hose 6 penetrates through the steel pipe 5 and is connected to an inflation device in the roadway. The steel pipe 5 is pushed into the depth beyond the liner 2.
And (3) inflating the high-pressure air bag 7 through the high-pressure hose 6 by using a roadway inflation device to expand and close the extraction hole behind the liner tube 2.
And 4, pumping a plugging agent under pressure from a grouting port, wherein the purpose is to plug an annular space outside the liner tube 2, more importantly, the plugging agent can split and expand coal body cracks in a hole wall under the action of grouting pressure, fill pores and coal body concave-convex surfaces, and be injected into the hole wall coal body disturbance cracks around the gas extraction drill hole under pressure, and permeate into coal body micro cracks under the action of large osmotic pressure gradient, so that the plugging agent and coal body particle solids are bonded together, and air is thoroughly sealed to prevent from entering a channel.
And closing the grouting port valve 4 after grouting is finished. And (3) injecting clear water into the steel pipe 5, flushing the plugging agent between the high-pressure air bag 7 and the annular second annular rubber cylinder 32 until the water quality of the inlet and the outlet is consistent, and stopping the pump. Waiting for 24 hours.
And 5, after the pressure of the high-pressure air bag 7 is released, pulling out the steel pipe 5 and the high-pressure air bag 7. And (5) after the construction is finished, connecting the liner tube 2 to the roadway gas negative pressure drainage tube, continuing gas drainage, and sampling and detecting the gas concentration.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present application and not for limiting the scope of protection thereof, and although the present application is described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that after reading the present application, they can make various changes, modifications or equivalents to the specific embodiments of the application, but these changes, modifications or equivalents are all within the scope of protection of the claims to be filed.
Claims (10)
1. The gas extraction device in the coal mine roadway is characterized by comprising a hole sealing pipe extraction unit and a plugging agent packing unit;
the plugging agent packing unit is of a hollow structure, the orifice of the extraction hole is sealed, and the hole sealing pipe extraction unit penetrates through the hollow part of the plugging agent packing unit;
one end of the hole sealing pipe extraction unit is arranged in the extraction hole, and the other end of the hole sealing pipe extraction unit is positioned at the position of an extraction hole orifice of the roadway (14);
the extraction holes are drilled from the coal wall along the direction of the coal bed (13).
2. The gas extraction device in the coal mine roadway according to claim 1, wherein the hole sealing pipe extraction unit comprises a hole sealing pipe (8), the hole sealing pipe (8) is arranged in the center of an extraction hole channel, the hole sealing pipe (8) is a section of straight pipe, the length of the straight pipe is smaller than that of a drilled extraction hole, and an annular space between the outer wall and the extraction hole is used for pumping plugging agent.
3. The gas extraction device in the coal mine roadway according to claim 2, wherein the blocking agent packing unit comprises a packer (11), the packer (11) is installed at one end of an extraction hole orifice of the hole sealing pipe (8) and is of an annular closed capsule-shaped rubber barrel structure, the outer wall of the packer is an annular rubber sheet, the narrow ring outer wall of the annular rubber sheet is sleeved on the outer wall of the hole sealing pipe (8), and the large ring outer wall is tightly attached to the coal bed (13) on the inner wall of the extraction hole.
4. The gas extraction device in the coal mine roadway according to claim 3, wherein the packer (11) is provided with a small pressurizing hole, a valve joint for pressurizing is installed at the orifice of the small pressurizing hole, when the hole sealing pipe (8) is used for extraction, an external pressurizer pressurizes and fills high-pressure gas, a bladder-shaped rubber sleeve is pressurized and expanded, the rubber sleeve is inflated and expanded, and the annular rubber sleeve packer (11) is used for sealing an annular space between the outer wall of the hole sealing pipe (8) and the coal seam (13) on the inner wall of the extraction hole.
5. The gas extraction device in the coal mine roadway according to claim 4, wherein the valve joint pressurized by the packer (11) is externally connected with a high-pressure output interface end of a pressurizer.
6. The gas extraction device in the coal mine roadway according to claim 2, wherein the plugging agent packing unit comprises a sealing layer, the sealing layer fills and wraps an annular space between the outer wall of the hole sealing pipe (8) and the coal seam (13) on the inner wall of the extraction hole, and the sealing layer is formed by grouting plugging agent.
7. The gas extraction device in the coal mine roadway according to claim 2, wherein the hole sealing pipe extraction unit further comprises a plurality of centralizers (9), each centralizer (9) is of an annular sleeve structure and is sleeved outside the hole sealing pipe (8), claws of the centralizers (9) are fixed on the sealing layer, centers of lantern rings of the centralizers (9) are distributed on the hole sealing pipe (8), and the hole sealing pipe (8) and the extraction hole are coaxial.
8. The gas extraction device in the coal mine roadway according to claim 2, wherein the hole sealing pipe extraction unit further comprises a hole sealing pipe coupling (12), the hole sealing pipe coupling (12) is connected to one end, located at an orifice of the extraction hole, of the hole sealing pipe (8), and the hole sealing pipe coupling (12) is of an annular closed structure and forms an outer interface of the hole sealing pipe (8).
9. The utility model provides a gas drainage device's slip casting part in coal mine tunnel which characterized in that includes: the hole sealing pipe (8), the check valve (10) and external grouting equipment;
the hole sealing pipe (8) is a cylindrical pipeline, and two ends of the pipeline are of open structures;
the check valve (10) is connected with one end of the hole sealing pipe (8) in the extraction hole, and the other end of the hole sealing pipe (8) is connected with external grouting equipment at the hole opening of the extraction hole.
10. Grouting element according to claim 9, characterised in that the check valve (10) is a hemispherical projection with a small hole at the edge, in the unidirectional direction from inside the bore-sealing tube (8) to outside the bore-sealing tube (8);
after the grouting stage is finished and the grouting is solidified, the outer wall of the hole sealing pipe (8) and the annular space of the coal seam of the extraction hole form a sealing layer structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021044219.9U CN212774391U (en) | 2020-06-09 | 2020-06-09 | Gas drainage device in coal mine tunnel and grouting part thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021044219.9U CN212774391U (en) | 2020-06-09 | 2020-06-09 | Gas drainage device in coal mine tunnel and grouting part thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212774391U true CN212774391U (en) | 2021-03-23 |
Family
ID=75072968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021044219.9U Active CN212774391U (en) | 2020-06-09 | 2020-06-09 | Gas drainage device in coal mine tunnel and grouting part thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212774391U (en) |
-
2020
- 2020-06-09 CN CN202021044219.9U patent/CN212774391U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105239965B (en) | Halogen method is arranged in salt hole air reserved storeroom gas injection | |
| CN103452525B (en) | Gas takes out fixed stopper and using method thereof | |
| CN105840134A (en) | Single-bag grouting hole sealing device for upward crossing boreholes and hole sealing method adopting single-bag grouting hole sealing device | |
| CN107313799A (en) | A kind of sealing and leakage plugging device and method for gas pumping | |
| CN105715230A (en) | Middle slurry-permeating type single-bag grouting hole sealing device and hole sealing method thereof | |
| CN210977392U (en) | Gas drainage drilling hole sealing device | |
| CN109138904B (en) | Double-packer layered grouting water stop device and use method thereof | |
| CN106837240A (en) | Segmentation capsule-type injection hole sealing device and its method for sealing based on fluid | |
| CN207048813U (en) | Sealing and leakage plugging device for gas pumping | |
| CN202644538U (en) | A grouting device used for a water-rich quicksand stratum | |
| CN204753611U (en) | Deep basal pit pressure -bearing water precipitation gas well gas bag plugging device | |
| CN110725700B (en) | Coal seam spraying reinforcement and graded glue injection cooperative hole sealing method | |
| CN114320206A (en) | Mining gas drainage hole sealing system | |
| CN116398082B (en) | Multi-aquifer packing device, water taking device and water taking method for deep geothermal well | |
| CN212774391U (en) | Gas drainage device in coal mine tunnel and grouting part thereof | |
| CN109899024B (en) | Grouting construction method for water injection pressurization water expansion sealing perforated pipe | |
| CN107780873A (en) | The three-stage capsule sealing device and its encapsulating method of a kind of mash gas pumping drilling | |
| CN209556980U (en) | Coal measure gas prospect pit naked eye device for plugging | |
| CN107905762B (en) | A kind of solid powder-grouting with pressure dynamic method for sealing | |
| CN215804475U (en) | Sleeve valve pipe slip casting component and be used for hole sealing subassembly of rich water karst | |
| CN206190262U (en) | Slip casting hole sealing device is pressed in downthehole prefabricated pipeline area of gas drainage drilling | |
| CN113236341B (en) | Device for enhancing gas extraction in underground coal mine and using method | |
| CN212154846U (en) | Secondary grouting plugging device in drilling | |
| CN103541679A (en) | Method for sealing underground hydraulic fracture drilled hole of coal mine in combined manner | |
| CN210134898U (en) | Self-flowing water injection well completion pipe string |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |