CN104481588B - A kind of encapsulating method of coal mine gob - Google Patents
A kind of encapsulating method of coal mine gob Download PDFInfo
- Publication number
- CN104481588B CN104481588B CN201410659896.4A CN201410659896A CN104481588B CN 104481588 B CN104481588 B CN 104481588B CN 201410659896 A CN201410659896 A CN 201410659896A CN 104481588 B CN104481588 B CN 104481588B
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- China
- Prior art keywords
- gas
- airway
- goaf
- pipe
- baffle walls
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
- E21F17/12—Dam doors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The encapsulating method of a kind of coal mine gob, belongs to coal mine gob gas pumping technical field.The first sealing chamber of the present invention utilizes the mobility of fine sand, and under crustal stress and exploitation dynamic stress effect, when between the first baffle walls sealing chamber or baffle walls, crack occurs in roadway surrounding rock, can Fast Filling crack by fine sand, it is ensured that seal；Second seals chamber utilizes positive and negative pressure characteristic, the air pressure that the nitrogen pressure of the second annular seal space indoor is consistently higher than in airway, seal chamber by second to be isolated with airway in goaf, ensure that the air in airway will not enter goaf, and the gas in goaf does not penetrates in airway yet；Sealing chamber and second by first and seal the dual-seal of chamber, high degree improves the sealing reliability in goaf, spontaneous combustion probability and the gas explosion probability of float coal is preferably minimized, has ensured the safety of neighbouring tunnel or work surface.
Description
Technical field
The invention belongs to coal mine gob gas pumping technical field, particularly relate to the encapsulating method of a kind of coal mine gob.
Background technology
During coal mining, especially under the conditions of coal seam group mining and thick seam slicing system, adjacent coal seam, unmind layering and
Country rocks etc. all can be gushed out to goaf gas, and goaf mostly takes closing measure, can also exist more highly concentrated in goaf
The gas of degree, in goaf there is spontaneous combustion possibility in float coal in addition, and this is by serious threat adjacent coal seam or the peace of separate zone production work surface
Full production.In order to prevent the gas in goaf from pouring in exploitation work surface, technical staff is dropped by continuous extraction goaf gas
The concentration of low goaf gas.
Must assure that effective sealing in goaf while goaf gas extraction, but use existing closing measure that goaf is entered
Row seals, and its sealing effectiveness is the most very good, and the occurrence probability of security incident is the highest, and concrete reason is as follows:
At present, the closing measure in goaf mainly utilizes fire dam to seal goaf, and fire dam has two-layer body of wall, body of wall
Assembled by fragment of brick cement and form, filled by loess between two-layer body of wall, fire dam and tunnel directly push up between again by loess
Fill.Under crustal stress and exploitation dynamic stress effect, roadway surrounding rock there will be loosening crack, and the body of wall of fire dam also can go out simultaneously
Burst apart in existing crack, even body of wall.Now, the fresh air in tunnel can leak into goaf, and the gas in goaf by crack
Also can escape in tunnel by crack, particularly in goaf, be mixed into too much fresh air, significantly increase float coal from
Combustion probability, serious even can cause gas explosion accident.
Summary of the invention
The problem existed for prior art, the present invention provides the encapsulating method of a kind of coal mine gob, and high degree improves to be adopted
The sealing reliability of dead zone, is preferably minimized spontaneous combustion probability and the gas explosion probability of float coal, has ensured neighbouring tunnel or work surface
Safety.
To achieve these goals, the present invention adopts the following technical scheme that the encapsulating method of a kind of coal mine gob, including as follows
Step:
Step one: excavate groove at two on the roadway surrounding rock of line near stopping adopting in work surface air entering and returning lane, groove interval point at two
Cloth；
Step 2: excavate taper cave on back between groove at two；
Step 3: be respectively embedded into baffle walls at two in groove, is collectively formed by roadway surrounding rock between two baffle walls and baffle walls
One seals chamber；
Step 4: install sand filling tube, sand filling tube passes baffle walls, and its one end is positioned at the taper cave of the first sealing chamber, separately
One end is positioned at outside baffle walls, and with the baffle walls place of installing, sand filling tube is carried out encapsulation process；
Step 5: install gas pumping pipe, gas pumping pipe passes baffle walls, and its one end is positioned at goaf, and the other end is positioned at
In airway, and gas pumping pipe is carried out encapsulation process with the baffle walls place of installing；
Step 6: by sand filling tube constantly to the first annular seal space indoor injection fine sand, until sealing chamber and taper cave by first
All fill；
Step 7: construct a putty stone fire dam in first seals the work surface air entering and returning lane between chamber and airway, by
Work stone fire dam, side, airway baffle walls and between the two roadway surrounding rock collectively form the second sealing chamber；Airtight at work stone
Being provided with note nitrogen pipe within the walls, it is indoor that note nitrogen pipe one end is positioned at the second annular seal space, and the other end is positioned at airway；
Step 8: by gas pumping pipe and gas drainage system tandem, by the gas in gas pumping pipe continuous extraction goaf,
Sealing chamber by note nitrogen pipe to second simultaneously and be persistently filled with nitrogen, the air pressure making the second annular seal space indoor is higher than in airway
Air pressure.
While installing gas pumping pipe, there is also mounted goaf Gas observation pipe, goaf Gas observation pipe passes baffle walls,
Its one end is positioned at goaf, and the other end is positioned at airway, and carries out goaf Gas observation pipe with the baffle walls place of installing
Encapsulation process；Utilize the gas sample in Gas observation pipe extraction goaf, goaf, by gas sample monitoring goaf gas
Composition and concentration.
Installing while gas pumping pipe, there is also mounted gob floor and turn one's coat pipe, gob floor pipe of turning one's coat through baffle walls,
Its one end is positioned at goaf, and the other end is positioned at airway, and pipe of turning one's coat gob floor is carried out with the baffle walls place of installing
Encapsulation process；According to water in gob area situation, gob floor is utilized to turn one's coat bank of tubes except the hydrops in goaf.
In order to further enhance the airtight performance of the first sealing chamber and airtight timeliness, spray on the baffle walls surface of side, airway
Scribble cement sand bed.
In order to further enhance the airtight performance of the second sealing chamber and airtight timeliness, there is cement bonded sand at work stone fire dam surface spraying
Pulp layer.
It is also equipped with sealing chamber Gas observation pipe in work stone fire dam, seals chamber Gas observation pipe one end and be positioned at the second sealing
In chamber, the other end is positioned at airway；Sealing chamber Gas observation pipe is utilized to extract the gas sample that the second annular seal space is indoor,
Monitor whether the second annular seal space indoor have gas leakage by gas sample.
Being also equipped with water column differential manometer in work stone fire dam, it is indoor that water column pressure reduction measurement amount end is positioned at the second annular seal space, reading end
It is positioned at airway；The pressure difference between the second sealing chamber and airway is read in real time by water column differential manometer, it is ensured that the
The air pressure that the air pressure of two annular seal spaces indoor is consistently higher than in airway.
Beneficial effects of the present invention:
The first sealing chamber of the present invention make use of the mobility characteristic of fine sand, answers even across long crustal stress and exploitation are dynamic
Under power effect, between the baffle walls of the first sealing chamber or baffle walls, there is crack in roadway surrounding rock, also is able to quickly will split by fine sand
Gap is filled, it is ensured that seal；Second seals chamber then make use of positive and negative pressure characteristic, due to the nitrogen gas that the second annular seal space is indoor
The air pressure that pressure is consistently higher than in airway, seals chamber by second and is isolated with airway in goaf, it is ensured that
Air in airway will not enter goaf, and the gas in goaf does not penetrates in airway yet；Seal by first
Chamber and second seals the dual-seal of chamber, and high degree improves the sealing reliability in goaf, by the spontaneous combustion probability of float coal
It is preferably minimized with gas explosion probability, has ensured the safety of neighbouring tunnel or work surface.
Accompanying drawing explanation
Fig. 1 is that the encapsulating method of a kind of coal mine gob using the present invention carries out schematic diagram after roadway construction；
In figure, 1 work surface air entering and returning lane, 2 grooves, 3 taper caves, 4 baffle walls, 5 first sealing chambers, 6
Gas pumping pipe, 7 goafs, 8 airways, 9 sand filling tubes, 10 fine sands, 11 work stone fire dams, 12
Two seal chambers, 13 goaf Gas observation pipes, and 14 gob floors are turned one's coat pipe, 15 cement sand beds, 16 sealings
Gas to chamber sighting tube, 17 water column differential manometers, 18 roadway surrounding rocks, 19 note nitrogen pipes.
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
The encapsulating method of described coal mine gob, comprises the steps:
Step one: excavate groove 2 at two, groove at two on the roadway surrounding rock 18 of line near stopping adopting in work surface air entering and returning lane 1
2 is spaced apart, and spacing distance is 10m；
Step 2: excavating taper cave 3 on back between groove 2 at two, cave height is 2m；
Step 3: be respectively embedded into baffle walls 4 at two in groove 2, common by roadway surrounding rock between two baffle walls 4 and baffle walls
Constitute the first sealing chamber 5；
Step 4: installing sand filling tube 9, sand filling tube 9 is through baffle walls 4, and its one end is positioned at the taper cave of the first sealing chamber 5
In 3, the other end is positioned at airway 8, and with baffle walls 4 place of installing, sand filling tube 9 is carried out encapsulation process；
Step 5: installing gas pumping pipe 6, gas pumping pipe 6 is through baffle walls 4, and its one end is positioned at goaf 7, another
End is positioned at outside baffle walls 4, and with baffle walls 4 place of installing, gas pumping pipe 6 is carried out encapsulation process；
Step 6: by sand filling tube 9 constantly to first seal chamber 5 in inject fine sand 10, until seal first chamber 5 and
Taper cave 3 all fills；Through long crustal stress and exploitation dynamic stress effect under, when first seal chamber 5 gear
After between board wall 4 or baffle walls, crack occurs in roadway surrounding rock, by the mobility of fine sand 10, crack can quickly be filled by fine sand 10,
And then ensure that the seal of the first sealing chamber 5；
Step 7: construct a putty stone in first seals the work surface air entering and returning lane 1 between chamber 5 and airway 8 airtight
Wall 11, by work stone fire dam 11, side, airway 8 baffle walls 4 and between the two roadway surrounding rock collectively form the second annular seal space
Room 12, wherein work stone fire dam 11 is 3m with the spacing of baffle walls 4；Note nitrogen pipe 19 is installed in work stone fire dam 11,
Note nitrogen pipe 19 one end is positioned at the second sealing chamber 12, and the other end is positioned at airway 8；
Step 8: by gas pumping pipe 6 and gas drainage system tandem, by the continuous extraction goaf 7 of gas pumping pipe 6
Gas, simultaneously by note nitrogen pipe 19 to second seal chamber 12 be persistently filled with nitrogen, make the nitrogen in the second sealing chamber 12
Air pressure is higher than the air pressure in airway 8, and pressure reduction maintains 10～50Pa.
While installing gas pumping pipe 6, there is also mounted goaf Gas observation pipe 13, goaf Gas observation pipe 13 is worn
Crossing baffle walls 4, its one end is positioned at goaf 7, and the other end is positioned at airway 8, and to goaf Gas observation pipe 13
Encapsulation process is carried out with baffle walls 4 place of installing；Goaf Gas observation pipe 13 is utilized to extract the gas sample in goaf 7, logical
Cross gas sample monitoring goaf 7 gas componant and concentration.
Installing while gas pumping pipe 6, there is also mounted gob floor and turn one's coat pipe 14, gob floor pipe 14 of turning one's coat is worn
Crossing baffle walls 4, its one end is positioned at goaf 7, and the other end is positioned at airway 8, and pipe 14 of turning one's coat gob floor
Encapsulation process is carried out with baffle walls 4 place of installing；According to goaf 7 hydrops situation, utilize gob floor turn one's coat pipe 14 get rid of adopt
Hydrops in dead zone 7.
In order to further enhance the airtight performance of the first sealing chamber 5 and airtight timeliness, in the baffle walls 4 of side, airway 8
Surface spraying has cement sand bed 15.
In order to further enhance the airtight performance of the second sealing chamber 12 and airtight timeliness, have at work stone fire dam 11 surface spraying
Cement sand bed 15.
It is also equipped with sealing chamber Gas observation pipe 16 in work stone fire dam 11, seals chamber Gas observation pipe 16 one end and be positioned at
Second seals in chamber 12, and the other end is positioned at airway 8；Sealing chamber Gas observation pipe 16 is utilized to extract the second sealing
Whether the gas sample in chamber 12, by having gas leakage in gas sample monitoring the second sealing chamber 12.
Being also equipped with water column differential manometer 17 in work stone fire dam 11, water column differential manometer 17 is measured end and is positioned at the second sealing chamber 12
In, reading end is positioned at airway 8；The second sealing chamber 12 and airway 8 is read in real time by water column differential manometer 17
Between pressure difference, it is ensured that the second air pressure sealed in chamber 12 is consistently higher than the air pressure in airway 8.
Scheme in embodiment is also not used to limit the scope of patent protection of the present invention, all equivalence enforcement done without departing from the present invention
Or change, it is both contained in the scope of the claims of this case.
Claims (3)
1. the encapsulating method of a coal mine gob, it is characterised in that: comprise the steps:
Step one: excavate groove at two on the roadway surrounding rock of line near stopping adopting in work surface air entering and returning lane, groove interval point at two
Cloth；
Step 2: excavate taper cave on back between groove at two；
Step 3: be respectively embedded into baffle walls at two in groove, is collectively formed by roadway surrounding rock between two baffle walls and baffle walls
One seals chamber；
Step 4: install sand filling tube, sand filling tube passes baffle walls, and its one end is positioned at the taper cave of the first sealing chamber, separately
One end is positioned at airway, and with the baffle walls place of installing, sand filling tube is carried out encapsulation process；
Step 5: install gas pumping pipe, gas pumping pipe passes baffle walls, and its one end is positioned at goaf, and the other end is positioned at
In airway, and gas pumping pipe is carried out encapsulation process with the baffle walls place of installing；
While installing gas pumping pipe, there is also mounted goaf Gas observation pipe, goaf Gas observation pipe passes baffle walls,
Its one end is positioned at goaf, and the other end is positioned at airway, and carries out goaf Gas observation pipe with the baffle walls place of installing
Encapsulation process；Utilize the gas sample in Gas observation pipe extraction goaf, goaf, by gas sample monitoring goaf gas
Composition and concentration；
Installing while gas pumping pipe, there is also mounted gob floor and turn one's coat pipe, gob floor pipe of turning one's coat through baffle walls,
Its one end is positioned at goaf, and the other end is positioned at airway, and pipe of turning one's coat gob floor is carried out with the baffle walls place of installing
Encapsulation process；According to water in gob area situation, gob floor is utilized to turn one's coat bank of tubes except the hydrops in goaf；
Step 6: by sand filling tube constantly to the first annular seal space indoor injection fine sand, until sealing chamber and taper cave by first
All fill；
Step 7: construct a putty stone fire dam in first seals the work surface air entering and returning lane between chamber and airway, by
Work stone fire dam, side, airway baffle walls and between the two roadway surrounding rock collectively form the second sealing chamber；Airtight at work stone
Being provided with note nitrogen pipe within the walls, it is indoor that note nitrogen pipe one end is positioned at the second annular seal space, and the other end is positioned at airway；
It is also equipped with sealing chamber Gas observation pipe in work stone fire dam, seals chamber Gas observation pipe one end and be positioned at the second sealing
In chamber, the other end is positioned at airway；Sealing chamber Gas observation pipe is utilized to extract the gas sample that the second annular seal space is indoor,
Monitor whether the second annular seal space indoor have gas leakage by gas sample；
Being also equipped with water column differential manometer in work stone fire dam, it is indoor that water column pressure reduction measurement amount end is positioned at the second annular seal space, reading end
It is positioned at airway；The pressure difference between the second sealing chamber and airway is read in real time by water column differential manometer, it is ensured that the
The air pressure that the air pressure of two annular seal spaces indoor is consistently higher than in airway；
Step 8: by gas pumping pipe and gas drainage system tandem, by the gas in gas pumping pipe continuous extraction goaf,
Sealing chamber by note nitrogen pipe to second simultaneously and be persistently filled with nitrogen, the air pressure making the second annular seal space indoor is higher than in airway
Air pressure.
The encapsulating method of a kind of coal mine gob the most according to claim 1, in order to further enhance the first sealing chamber
Airtight performance and airtight timeliness, it is characterised in that: the baffle walls surface spraying in side, airway has cement sand bed.
The encapsulating method of a kind of coal mine gob the most according to claim 1, in order to further enhance the second sealing chamber
Airtight performance and airtight timeliness, it is characterised in that: there is cement sand bed at work stone fire dam surface spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410659896.4A CN104481588B (en) | 2014-11-19 | 2014-11-19 | A kind of encapsulating method of coal mine gob |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410659896.4A CN104481588B (en) | 2014-11-19 | 2014-11-19 | A kind of encapsulating method of coal mine gob |
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| Publication Number | Publication Date |
|---|---|
| CN104481588A CN104481588A (en) | 2015-04-01 |
| CN104481588B true CN104481588B (en) | 2016-09-28 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2016208375A1 (en) * | 2015-07-28 | 2017-02-16 | Pascal Tech Pty Ltd | System and Method for Managing Pressure of Gases in Coal Mines |
| CN106761926A (en) * | 2016-11-17 | 2017-05-31 | 北京科技大学 | A kind of soft or hard closing blocking method of underground coal mine anaerobic driving face |
| CN106837419B (en) * | 2017-04-07 | 2019-05-28 | 兖州煤业股份有限公司 | Face sky old working compound closure wall and its method of construction |
| CN108104865B (en) * | 2017-11-28 | 2019-06-11 | 中国矿业大学 | A kind of concordant drilling Anti-air-leakage gas pumping method |
| CN108051125B (en) * | 2017-12-06 | 2019-06-11 | 中国矿业大学(北京) | A kind of closed goaf caving zone stress field evolution measurement method |
| CN108661710A (en) * | 2018-04-03 | 2018-10-16 | 淮北矿业股份有限公司 | A kind of explosion-proof fire dam of coal cutting roadway |
| CN112360502B (en) * | 2020-09-28 | 2022-12-20 | 中煤科工开采研究院有限公司 | Coal roadway rapid tunneling method and equipment based on spray layer and atmospheric pressure |
| CN112647975B (en) * | 2020-12-22 | 2023-12-29 | 华能煤炭技术研究有限公司 | Closed extraction method and system for goaf of roof-cutting entry retaining working face |
| CN112880941B (en) * | 2021-01-13 | 2022-06-17 | 中国矿业大学 | Method for detecting rapid air leakage of underground goaf |
| CN112901245B (en) * | 2021-01-29 | 2023-03-31 | 中煤科工集团重庆研究院有限公司 | Roadway pressure equalizing system and method for preventing spontaneous combustion of goaf |
| CN113356927B (en) * | 2021-07-20 | 2023-10-20 | 国能神东煤炭集团有限责任公司 | Underground fireproof explosion-proof airtight isolation system and construction method thereof |
| CN113323710B (en) * | 2021-07-20 | 2021-12-21 | 中国矿业大学(北京) | Goaf nitrogen injection pressure-equalizing air leakage prevention structure, system and method |
| CN116291716A (en) * | 2023-04-26 | 2023-06-23 | 中矿地科技术研究院(江苏)有限公司 | Goaf sealing device is used in mine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720535A (en) * | 2012-06-06 | 2012-10-10 | 旬邑虎豪黑沟煤业有限公司 | Method for preventing goaf air leakage during soft rock crack development coal seam mining of coal mine |
| CN102797500A (en) * | 2012-08-24 | 2012-11-28 | 淮南矿业(集团)有限责任公司 | Gob sealing structure |
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