CN114412411A - Mining drilling hole plugging gas extraction device and working method thereof - Google Patents
Mining drilling hole plugging gas extraction device and working method thereof Download PDFInfo
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- CN114412411A CN114412411A CN202210188064.3A CN202210188064A CN114412411A CN 114412411 A CN114412411 A CN 114412411A CN 202210188064 A CN202210188064 A CN 202210188064A CN 114412411 A CN114412411 A CN 114412411A
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- bag
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- return pipe
- grouting
- deep
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- 238000005553 drilling Methods 0.000 title claims abstract description 33
- 238000000605 extraction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005065 mining Methods 0.000 title claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 69
- 238000007789 sealing Methods 0.000 claims abstract description 53
- 239000007787 solid Substances 0.000 claims description 8
- 239000011440 grout Substances 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000007569 slipcasting Methods 0.000 claims 2
- 239000012530 fluid Substances 0.000 abstract description 4
- 239000002390 adhesive tape Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a mining drilling hole plugging gas extraction device and a working method thereof, wherein the device comprises a hole sealing pipe which is arranged in the deep part of a drilling hole, a bag A and a bag B are respectively sleeved on the hole sealing pipe at an interval of 10m, and the bag A and the bag B are both hollow elastic structures; the grouting pipe penetrates through the bag B and extends into the bag A; the drilling fluid also comprises a deep slurry return pipe, one end of the deep slurry return pipe is arranged at a position which is 0.5m away from the pocket, and the other end of the deep slurry return pipe is positioned outside the drill hole; the drilling fluid also comprises a shallow slurry return pipe, one end of the shallow slurry return pipe is positioned at a position exceeding the bag B0.5m, and the other end of the shallow slurry return pipe is positioned outside the drilled hole. The method solves the problems of poor hole sealing quality, poor plugging and unrealistic grouting caused by the adoption of a single backflow pipe in the prior art.
Description
Technical Field
The invention belongs to the technical field of mine grouting devices, and particularly relates to a mine drilling hole plugging gas extraction device and a working method thereof.
Background
The existing mine generally adopts a single backflow pipe to flow back, during grouting, when the backflow pipe starts to return slurry, the completion of grouting is judged, but due to factors such as drilling angles and tracks, a drilling hole sealing section is not filled, and the slurry starts to return, so that the phenomena of poor hole sealing quality, poor plugging, incomplete grouting and frequent gas leakage are caused, the extraction concentration is reduced, the requirement of high-efficiency mine disaster treatment cannot be met, the extraction cannot reach the standard, and potential safety hazards and accidents such as overlarge gas, over-limit and the like easily occur in the extraction process.
Disclosure of Invention
The invention aims to provide a gas extraction device for mine drilling plugging and a working method thereof, and aims to solve the problems of poor hole sealing quality, poor plugging and poor grouting caused by the adoption of a single backflow pipe in the prior art.
The invention adopts the following technical scheme: a mining drilling hole plugging gas extraction device comprises a hole sealing pipe which is used for being placed in the deep position of a drilling hole, wherein a bag A and a bag B are respectively sleeved on the hole sealing pipe at an interval of 10m, and both the bag A and the bag B are of hollow elastic structures; the grouting pipe penetrates through the bag B and extends into the bag A; the drilling fluid also comprises a deep slurry return pipe, one end of the deep slurry return pipe is arranged at a position which is 0.5m away from the pocket, and the other end of the deep slurry return pipe is positioned outside the drill hole; the drilling fluid also comprises a shallow slurry return pipe, one end of the shallow slurry return pipe is positioned at a position exceeding the bag B0.5m, and the other end of the shallow slurry return pipe is positioned outside the drill hole;
the grouting pipe is used for simultaneously grouting into the bag A and the bag B; the bag A and the bag B are used for seeping slurry into a plugging space between the bag A and the bag B in the drill hole after the bag A and the bag B are filled with slurry; and the deep slurry return pipe and the shallow slurry return pipe are respectively used for generating slurry return at different positions from grouting to the plugging space.
Furthermore, the section of the hole sealing pipe positioned in the plugging space and at the outlet of the drill hole is a multi-section solid pipe connected in series, and the section of the hole sealing pipe positioned in the deep part of the drill hole is a sieve pipe.
Furthermore, a blasting valve is arranged on the grouting pipe.
Furthermore, a pressure gauge and a control valve are arranged on the grouting pipe.
The second technical scheme of the invention is that the working method of the mining drilling hole plugging gas extraction device comprises the following steps:
s1, cleaning the hole sealing pipe and cleaning sundries in the pipe;
s2, installing plugs on the ends of the sieve tube, sleeving the bag A and the bag B on the hole sealing tube at intervals, and fixing the bag A at a position 0.1m away from the joint of the solid tube and the sieve tube;
meanwhile, the hole sealing pipe, the bag A and the bag B are sent into the drill hole, and the bag B is fixed at a position 0.7m away from the outlet of the hole sealing pipe, so that the outlet of the hole sealing pipe is exposed out of the hole opening of the drill hole by 0.2 m;
s3, inserting a deep slurry return pipe and a shallow slurry return pipe into the blocking space between the bag A and the bag B, wherein the distance between the pipe head of the deep slurry return pipe and the bag A is 0.5m, and the distance between the pipe head of the shallow slurry return pipe and the bag B is 0.5 m;
s4, grouting the interiors of the bag A and the bag B by a grouting pipe, and respectively seeping slurry into the plugging space after the bag A and the bag B are fully grouted; the deep return pipe returns the pulp first, and then the shallow return pipe is waited for returning the pulp; and after the shallow return pipe performs slurry return, grouting is completed.
Furthermore, the external leakage length of the deep slurry return pipe is greater than that of the shallow slurry return pipe, and the length difference is greater than 0.2 m.
The invention has the beneficial effects that: according to the invention, by grouting between the two bags, a gas extraction channel can be sealed, and gas is extracted only through one hole sealing pipe, so that the extraction effect is good; the original single slurry return pipe is changed into the double slurry return pipe, and the pipe descending position and depth are adjusted, so that the integral structure is simple, the operation is convenient, and the cost is low; can effectively and tightly seal the blockage, and improves the extraction effect and the disaster prevention capability.
Drawings
Fig. 1 is a schematic structural diagram of a mining drilling hole plugging gas extraction device.
The drilling machine comprises a drilling hole 1, a hole sealing pipe 2, a bag A31, a bag B32, a grouting pipe 4, a deep slurry return pipe 5, a shallow slurry return pipe 6, a blasting valve 7, a control valve 8, a pressure gauge 9 and a grouting pump 10.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a gas extraction device for plugging a mine drilled hole, which comprises a hole sealing pipe 2 used for being placed in the deep position of a drilled hole 1, wherein the hole sealing pipe 2 is made of a PVC pipe. The hole sealing pipe 2 is sleeved with a bag A31 and a bag B32 at an interval of 10m, and the bag A31 and the bag B32 are both hollow elastic structures; also included is a grouting tube 10 that extends through bladder B32 and into bladder a 31; the drilling device also comprises a deep slurry return pipe 5, one end of the deep slurry return pipe is arranged at a position which is 310.5m away from the pocket bag A, and the other end of the deep slurry return pipe is positioned outside the drilling hole 1; the drilling device also comprises a shallow grout returning pipe 6, one end of which is positioned at the position exceeding the B320.5m of the pocket and the other end of which is positioned outside the drilling hole 1. The middle grouting section of the two bags is changed into an effective hole sealing distance of 10m, so that the effective hole sealing distance is ensured. The distance between the two slurry return pipes and the two bag bags is 0.5m, so that whether the slurry is in place can be effectively judged.
The grouting pipe 10 is used for simultaneously grouting into the bag A31 and the bag B32, and the hole sealing cement is expansion cement; pouch a31 and pouch B32, both for grouting into the plugged space inside the borehole between pouch a31 and pouch B32 after filling with grout; and the deep slurry return pipe 5 and the shallow slurry return pipe 6 are respectively used for generating slurry return at different positions of the plugging space from grouting.
In some embodiments, the section of the pipe 2 at the outlet of the borehole 1 is a plurality of solid pipes connected in series, and the section of the pipe 2 at the depth of the borehole 1 is a screen pipe. In specific use, 15 meters (5) of hole sealing pipes 2 can be put into a single drill hole 1, namely: 1 sieve tube (3 m/tube), 4 solid tubes (3 m/tube).
In some embodiments, a burst valve 7 is provided on the grout tube 4.
In some embodiments, a pressure gauge 9 and a control valve 8 are provided on the grout pipe 4.
The invention also provides a working method of the mining drilling hole plugging gas extraction device, which comprises the following steps:
s1, cleaning the hole sealing pipe 2 and cleaning sundries in the pipe;
s2, installing a plug at the end of the sieve tube, sleeving the bag A31 and the bag B32 on the hole sealing tube 2 at intervals, and fixing the bag A31 at a position 0.1m away from the joint of the solid tube and the sieve tube;
simultaneously, the hole sealing pipe 2, the bag A31 and the bag B32 are sent into the drill hole 1, and the bag B32 is fixed at a position 0.7m away from the outlet of the hole sealing pipe 2, so that the outlet of the hole sealing pipe 2 is exposed out of the orifice of the drill hole 1 by 0.2 m;
s3, a deep slurry return pipe 5 and a shallow slurry return pipe 6 are arranged in the plugging space between the bag A31 and the bag B32, the distance between the pipe head of the deep slurry return pipe 5 and the bag A31 is 0.5m, and the distance between the pipe head of the shallow slurry return pipe 6 and the bag B32 is 0.5 m;
s4, grouting the interiors of the bag A31 and the bag B32 simultaneously through the grouting pipe 4, and respectively seeping slurry into the blocking space after the bag A31 and the bag B32 are filled with the slurry; wherein, the deep return pipe 5 returns the pulp first, and then waits for the shallow return pipe 6 to return the pulp; and after the shallow return pipe 6 is subjected to slurry return, grouting is finished.
In some embodiments, the external leakage length of the deep slurry return pipe 5 is greater than that of the shallow slurry return pipe 6, and the length difference is greater than 0.2 m.
The invention relates to a method for using a mine drilling hole plugging gas extraction device, which comprises the following steps:
1. preparation work before hole sealing: firstly, the hole sealing pipe 2 is wiped clean (including a pipe body and a pipe opening), and the pipe is checked and cleaned to be free of impurities.
2. Lower hole sealing pipe 2: the conical plug is additionally arranged at the screen pipe head to prevent coal slime from blocking a pipeline in the pushing process, the bag A31 and the bag B32 are sleeved on the hole sealing pipe 2, the bag A31 is fixed at a position 0.1m away from the joint of the solid pipe and the screen pipe by using transparent adhesive tapes (namely, a position 3.1m away from the pipe opening of the screen pipe), the adhesive tapes are wound and fixed firmly, the winding width of the adhesive tapes does not exceed 0.2m, and the adhesive tapes are bound firmly and pulled firmly and cannot move. The method comprises the steps of sequentially connecting 5 hole sealing pipes 2, simultaneously sending the hole sealing pipes 2, a bag A31 and a bag B32 into a drill hole 1, binding the hole sealing pipes 2 and a grouting pipe by using a transparent adhesive tape at intervals of 2 meters for 5 times in total, enabling the grouting pipe not to deform during binding, and finally fixing the bag B32 at a position 0.7m away from an outlet of the hole sealing pipe 2 to enable the outlet of the hole sealing pipe 2 to be exposed out of an orifice of the drill hole 1 by 0.2 m.
3. 2 4-minute pulp return pipes are arranged between the bag A and the bag B, the distance between the pipe head of the deep pulp return pipe 5 and the bag A31 is 0.5m, and the distance between the pipe head of the shallow pulp return pipe 6 and the bag B32 is 0.5 m; and fixing the pulp return pipe by using an adhesive tape. The external leakage length of the deep slurry return pipe is larger than that of the shallow slurry return pipe, and the length difference is not less than 0.2 m.
4. The grouting pipe 4 simultaneously injects the grouting liquid into the bag A31 and the bag B32, and the bag A31 and the bag B32 seep the grouting liquid into the plugging space after being filled with the grouting liquid. In the grouting process, the deep backflow pipe returns the slurry firstly (after slurry is returned, the outer leakage end of the deep backflow pipe is folded to prevent the internal slurry from flowing out), then the shallow backflow pipe is waited for returning the slurry, after the shallow backflow pipe returns the slurry, the shallow backflow pipe is folded and bound firmly to prevent the internal slurry from flowing out, and grouting is completed.
Wherein, the grouting material is prepared according to the following steps: proportioning materials according to the proportion of 1:1, namely adding 2 bags (25 Kg of each bag) of 60L of water into slurry; if 20kg of water is used, i.e. 3 barrels, 25kg of water is used, i.e. 2.5 barrels.
Through repeated adjustment tests, the gas extraction device for mining drilling plugging is finally adjusted in the aspect of effective hole sealing length, the middle grouting section of the two bags is changed into an effective hole sealing distance of 10m, and the effective hole sealing distance is ensured; in the aspect of grouting, the position and the number of grouting pipes are adjusted, and an original single backflow pipe is changed into a double backflow pipe. The bag is 0.5m deep in the hole sealing section, and the bag is 0.5m outside the hole sealing section at one position, so that whether grouting is in place can be effectively judged; in the aspect of slurry, the mixing proportion is determined by testing the mixing proportion of the grouting material, so that the slurry can be effectively ensured to be solidified in specified time in a drilling hole. Through the series of means, the hole sealing process of two-plugging and one-injecting is technically improved, the concentration extraction of the drilled hole is effectively ensured, and the gas treatment effect of the mine is further improved.
Claims (6)
1. The mining drilling hole plugging gas extraction device is characterized by comprising a hole sealing pipe (2) used for being placed in the deep position of a drilling hole (1), wherein a bag A (31) and a bag B (32) are respectively sleeved on the hole sealing pipe (2) at an interval of 10m, and the bag A (31) and the bag B (32) are both of hollow elastic structures; further comprising a grouting tube (10) extending through the bladder B (32) and into the bladder A (31); the drilling device also comprises a deep pulp return pipe (5), one end of the deep pulp return pipe is arranged at a position 0.5m away from the bag A (31), and the other end of the deep pulp return pipe is positioned outside the drilling hole (1); the drilling device also comprises a shallow grout returning pipe (6), one end of the shallow grout returning pipe is positioned 0.5m above the bag B (32), and the other end of the shallow grout returning pipe is positioned outside the drilling hole (1);
wherein the grouting pipe (10) is used for grouting the interiors of the bag A (31) and the bag B (32) simultaneously; the capsular bag A (31) and the capsular bag B (32) are used for grouting into the blocking space between the capsular bag A (31) and the capsular bag B (32) in the drill hole after grouting; the deep slurry return pipe (5) and the shallow slurry return pipe (6) are respectively used for slurry return at different positions of the plugging space from grouting.
2. A mining borehole plugging gas extraction device according to claim 1, characterized in that the section of the hole sealing pipe (2) located in the plugging space and at the outlet of the borehole (1) is a plurality of solid pipes connected in series, and the section of the hole sealing pipe (2) located deep in the borehole (1) is a screen pipe.
3. A mining borehole plugging gas extraction device according to claim 1 or 2, characterized in that said slip casting pipe (4) is provided with a burst valve (7).
4. A mining borehole plugging gas extraction device according to claim 3, characterized in that said slip casting pipe (4) is provided with a pressure gauge (9) and a control valve (8).
5. The working method of the mining drilling hole plugging gas extraction device is characterized by comprising the following steps:
s1, cleaning the hole sealing pipe (2) and cleaning sundries in the pipe;
s2, installing a plug at the end of the sieve tube, sleeving the bag A (31) and the bag B (32) on the hole sealing tube (2) at intervals, and fixing the bag A (31) at a position 0.1m away from the joint of the solid tube and the sieve tube;
simultaneously, the hole sealing pipe (2), the bag A (31) and the bag B (32) are sent into the drill hole (1), and the bag B (32) is fixed at a position 0.7m away from the outlet of the hole sealing pipe (2), so that the outlet of the hole sealing pipe (2) is exposed out of the orifice of the drill hole (1) by 0.2 m;
s3, inserting a deep slurry return pipe (5) and a shallow slurry return pipe (6) into a plugging space between the bag A (31) and the bag B (32), wherein the distance between the pipe head of the deep slurry return pipe (5) and the bag A (31) is 0.5m, and the distance between the pipe head of the shallow slurry return pipe (6) and the bag B (32) is 0.5 m;
s4, grouting the interiors of the bag A (31) and the bag B (32) by a grouting pipe (4), and respectively seeping slurry into the plugging space after the bag A (31) and the bag B (32) are filled with the slurry; wherein, the deep return pipe (5) returns the pulp first, and then waits for the shallow return pipe (6) to return the pulp; and after the shallow return pipe (6) performs slurry return, grouting is completed.
6. The working method according to claim 5, characterized in that the external leakage length of the deep return pipe (5) is greater than the external leakage length of the shallow return pipe (6), and the length difference is greater than 0.2 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210188064.3A CN114412411A (en) | 2022-02-28 | 2022-02-28 | Mining drilling hole plugging gas extraction device and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210188064.3A CN114412411A (en) | 2022-02-28 | 2022-02-28 | Mining drilling hole plugging gas extraction device and working method thereof |
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| Publication Number | Publication Date |
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| CN114412411A true CN114412411A (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210188064.3A Pending CN114412411A (en) | 2022-02-28 | 2022-02-28 | Mining drilling hole plugging gas extraction device and working method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012155696A1 (en) * | 2011-05-13 | 2012-11-22 | 中国矿业大学 | High-pressure resistant drilled hole sealing method |
| CN104265237A (en) * | 2014-09-03 | 2015-01-07 | 安徽理工大学 | Gas extraction hole sealing method |
| CN108119094A (en) * | 2018-02-25 | 2018-06-05 | 中国平煤神马能源化工集团有限责任公司 | Deep fractures mash gas pumping drilling two blocks up one row's hole sealing device of a note and application method |
| CN208184704U (en) * | 2018-04-18 | 2018-12-04 | 西安科技大学 | A kind of pouch slip casting type gas drainage survey press seal aperture apparatus |
| CN217151898U (en) * | 2022-02-28 | 2022-08-09 | 陕西陕煤韩城矿业有限公司 | Gas extraction device for plugging of mining drill hole |
-
2022
- 2022-02-28 CN CN202210188064.3A patent/CN114412411A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012155696A1 (en) * | 2011-05-13 | 2012-11-22 | 中国矿业大学 | High-pressure resistant drilled hole sealing method |
| CN104265237A (en) * | 2014-09-03 | 2015-01-07 | 安徽理工大学 | Gas extraction hole sealing method |
| CN108119094A (en) * | 2018-02-25 | 2018-06-05 | 中国平煤神马能源化工集团有限责任公司 | Deep fractures mash gas pumping drilling two blocks up one row's hole sealing device of a note and application method |
| CN208184704U (en) * | 2018-04-18 | 2018-12-04 | 西安科技大学 | A kind of pouch slip casting type gas drainage survey press seal aperture apparatus |
| CN217151898U (en) * | 2022-02-28 | 2022-08-09 | 陕西陕煤韩城矿业有限公司 | Gas extraction device for plugging of mining drill hole |
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