CN109236354B - A kind of face formula pumping method based on gob side entry retaining gas control - Google Patents
A kind of face formula pumping method based on gob side entry retaining gas control Download PDFInfo
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- CN109236354B CN109236354B CN201811235295.5A CN201811235295A CN109236354B CN 109236354 B CN109236354 B CN 109236354B CN 201811235295 A CN201811235295 A CN 201811235295A CN 109236354 B CN109236354 B CN 109236354B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005086 pumping Methods 0.000 title claims abstract description 29
- 238000000605 extraction Methods 0.000 claims abstract description 64
- 238000010276 construction Methods 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000003245 coal Substances 0.000 abstract description 12
- 238000009423 ventilation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 9
- 238000005553 drilling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000002627 tracheal intubation Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
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- 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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Abstract
The present invention provides a kind of face formula pumping method based on gob side entry retaining gas control, face formula pumping method is mainly before the artificial fire dam construction of gob side entry retaining, reserved gas drainage pipe is respectively separated in the top plate and bottom plate of fire dam, and the length of extraction pipeline is determined according to the mine working face strip length that leaks out；The extraction of gas: gas drainage Guan Yuzhu extraction pipeline is connected to, and is opened gas drainage pump and is carried out extraction.The present invention can effectively solve the problem that air return lane gas exceeding limit problem caused by losing coal release gas, and extracting result is preferable；Present invention construction is relatively simple, and operation construction can be carried out under the premise of not influencing air return lane and normally divulging information；Drainage holes on gas drainage pipe are provided with the same side, also more quickly when punchinging；The drainage holes of upper and lower two sides arrange in opposite directions, i.e. setting, the stifled extraction wall of the one of forming face formula extraction face-to-face, can effectively intercept working face and leak out the goaf gas of distinguished and admirable carrying, largely alleviate the ventilation burden of air return lane.
Description
Technical field
The invention belongs to gas drainage technical fields, and in particular to a kind of face formula extraction based on gob side entry retaining gas control
Method.
Background technique
As coal mine green, high-efficiency mining theory are goed deep into, fender exploitation is the trend of coal mine future development, wherein edge
The lane Kong Liu technology refer to using during working face extraction by this roadway workface remain for subsequent work face service, not only may be used
To save the expense of a tunnelling, additionally it is possible to save the resource of a coal column.Using the working face one of edge air gallery technology
As use Y type draft type, although this mode can be avoided the problem of gas at upper corner transfinites, but outgoing airflow can pass through it is whole
The gas that coal release is lost in goaf can be drained to air return lane in exhaust ventilation by a goaf, as shown in Figure 1, with
The advance of the face, air return lane drainage gas gradually increases, can inevitably cause gas exceeding limit over time, for this
The administration way that situation mainly uses at present is intubated for artificial fire dam or construction drill fixed point extraction, but this mode can only
It solves the problems, such as the gas within the scope of the extraction radius of influence, and harmony when extraction is poor, is asked to solve whole tunnel gas
It inscribes and just needs intensive intubation or construction drill, this method can not only increase the closed burden of artificial fire dam, increase is constructed into
This, while also difficulty is increased to tunnel management.
Accordingly, it is desirable to provide a kind of be directed to the insufficient improved technology scheme of the above-mentioned prior art.
Summary of the invention
It is above-mentioned in the prior art when being exploited using gob side entry retaining technique the purpose of the present invention is overcoming, in goaf
Something lost coal can gradually discharge a certain amount of gas, with the lasting propulsion of working face, the gas drained in air return lane will be gradually
Increase, can inevitably cause gas exceeding limit over time, is close mostly for this possible gas exceeding limit problem caused
Collection intubation or construction drill, this method can not only increase the closed burden of artificial fire dam, increase construction cost, while also give
Tunnel management increases difficulty；The present invention is respectively arranged one time or more before the construction of artificial fire dam on its top plate and bottom plate
The gas drainage pipe with drainage holes is plowed, drainage holes are arranged in opposite directions, and in negative pressure extraction, upper and lower drainage holes will form a pumping
Wall is adopted, to carry out maximum extraction for the gas discharged in coal is lost.
To achieve the goals above, the invention provides the following technical scheme:
A kind of face formula pumping method based on gob side entry retaining gas control, the face formula pumping method include the following steps:
The production of S1, gas drainage pipe: taking gas drainage pipe, opens up multiple extractions along the length direction of gas drainage pipe
Hole；
The arrangement of S2, gas drainage pipe: before the artificial fire dam construction of gob side entry retaining, in the top plate and bottom plate of fire dam
It is respectively separated reserved gas drainage pipe；
The extraction of S3, gas: gas drainage Guan Yuzhu extraction pipeline is connected to, and is opened gas drainage pump and is carried out extraction.
In a kind of face formula pumping method based on gob side entry retaining gas control as described above, it is preferable that the extraction hole location
In the same side of the length direction of gas drainage pipe.
In a kind of face formula pumping method based on gob side entry retaining gas control as described above, it is preferable that the gas drainage
The internal diameter of pipe is d,Wherein:
D-gas drainage pipe internal diameter, m；
Gas flow, m are mixed in Q-gas drainage pipe3/ min, according to the maximum in service life or length of service region
Value determines, and should have 1.2~1.8 redundancy；
Gas mean flow rate, V=5~12m/s are mixed in V-gas drainage pipe.
In a kind of face formula pumping method based on gob side entry retaining gas control as described above, it is preferable that the drainage holes
Diameter becomes larger along the length direction of gas drainage pipe.
In a kind of face formula pumping method based on gob side entry retaining gas control as described above, it is preferable that the gas drainage
Pipe has twice, and the first gas pumping that gas drainage pipe is respectively located at closed wall top plate twice adopts pipe and positioned at fire dam bottom plate
Second gas drainage pipe.
In a kind of face formula pumping method based on gob side entry retaining gas control as described above, it is preferable that first gas
The first drainage holes and the second drainage holes are offered respectively on the length direction of drainage tube and the second gas drainage pipe.
In a kind of face formula pumping method based on gob side entry retaining gas control as described above, it is preferable that first extraction
Hole is located at the downside of the first drainage tube, and second drainage holes are located at the upside of the second gas drainage pipe, the first drainage holes and
Two drainage holes are arranged in opposite directions.
In a kind of face formula pumping method based on gob side entry retaining gas control as described above, it is preferable that first gas
The end of drainage tube and the second gas drainage pipe is respectively positioned in working face, and the aperture of the first drainage holes and the second drainage holes is by work
Make face to goaf to gradually become smaller.
In a kind of face formula pumping method based on gob side entry retaining gas control as described above, it is preferable that the fire dam
At least gas drainage pipe twice is provided on top plate and bottom plate.
In a kind of face formula pumping method based on gob side entry retaining gas control as described above, it is preferable that the fire dam
On top plate and bottom plate at least gas drainage pipe is arranged side by side on cross section twice.
Compared with the immediate prior art, technical solution provided by the invention has following excellent effect:
The present invention is on the production practice basis based on gob side entry retaining, before fire dam construction, in its top plate and bottom plate
It is upper to reserve one time or more times gas drainage pipes, drainage holes are offered on gas drainage pipe, the drainage holes phase on top plate and bottom plate
To arrangement, the one of forming face formula extraction blocks up virtual extraction wall, gushes out gas so as to intercept goaf to greatest extent, subtracts
Few face-airing burden, the safety in production of safeguard work face；The present invention at least has the following technical effect that compared with prior art:
1), the present invention can effectively solve the problem that gas exceeding limit problem caused by losing coal release gas, and extracting result is preferable；
2), present invention construction is relatively simple, and operation construction can be carried out under the premise of not influencing air return lane and normally divulging information；
3), the drainage holes on gas drainage pipe are provided with the same side, and ground is punchinged, and speed is fast, and the arrangement of drainage holes can protect
Region extracting result harmony is demonstrate,proved, traditional extraction borehole extracting result is avoided and is lacked with what extraction distance increase gradually decreased
Point；
4), the drainage holes of upper and lower two sides are arranged in opposite directions, i.e. setting face-to-face, the stifled extraction wall of the one of forming face formula extraction, energy
Enough goafs that intercepts to greatest extent gush out gas, reduce face-airing burden, the safety in production of safeguard work face；
5) present invention only needs to reserve one group of extraction mouth on fire dam, greatly reduces the high-frequency of traditional Processing tecchnics
The destruction that construction drill generates fire dam, ensures the obturation effect of fire dam, and the promotion of obturation effect can also improve gas pumping
Concentration is adopted, extraction efficiency is promoted；
6) present invention can increase or decrease drainage tube number amount according to administered Gas Outflow From Worked-out Area size, fit
It is stronger with property, convenient for promoting.
Detailed description of the invention
Fig. 1 is the schematic illustration of existing gob side entry retaining gas control；
Fig. 2 is the flow chart of the face formula extraction in the embodiment of the present invention；
Fig. 3 is the top view of working face in the embodiment of the present invention；
Fig. 4 is the top view of air return lane in the embodiment of the present invention；
Fig. 5 is the schematic illustration of face formula extraction in the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of gas drainage pipe in the embodiment of the present invention.
In figure: 1, working face；2, air return lane；3, goaf gushes out gas；4, goaf；5；Lose coal；6, fire dam；Watt 7,
This drainage tube；701, the first gas drainage pipe；702, the second gas drainage pipe；8, extraction wall；901, the first drainage holes；902,
Two drainage holes.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff's every other embodiment obtained, shall fall within the protection scope of the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the present invention be can be combined with each other.
As shown in Figure 1, for schematic diagram of divulging information in gob side entry retaining production practice, air return lane is by goaf, in goaf
A certain amount of gas can be released by losing coal, can be constructed many drillings for this part gas current methods gushed out, these drillings
The obturation effect of fire dam will be inevitably destroyed, conventional borehole extracting result increases with extraction distance to be gradually decreased, that is, is taken out
Nearby effect extracting result is preferably then poorer apart from remoter effect for borehole, however, to ensure that extracting result must just construct
The destructiveness of multiple groups drilling, more pairs of fire dams of construction drill is bigger, and seals the bad reduction that will cause extraction concentration, with
The lasting propulsion of stope, the length that air return lane passes through goaf gradually increase, the gas amount that air return lane is saved bit by bit by
It is cumulative big, it can inevitably cause gas exceeding limit.
As shown in Figure 2-5, a kind of face formula pumping method based on gob side entry retaining gas control, the face formula are provided for the present invention
Pumping method includes the following steps:
As shown in Fig. 2, the production of S1, gas drainage pipe 7: gas drainage pipe 7 is taken, along the length direction of gas drainage pipe 7
Open up multiple drainage holes.
When choosing gas drainage pipe 7, need first to determine the specification of gas drainage pipe 7, the choice of diameter of gas drainage pipe 7
Rationally whether, construction investment and extraction system effect to mash gas extraction system have a significant impact.Diameter is too big, and investment cost increases
Add；Diameter is meticulous, and resistance loss of pipeline is big, is allowed to referring concurrently to the practical capacity of extraction pump there are reserve level, and general gas is taken out
Adopt the internal diameter of pipe 7Wherein:
D-gas drainage pipe 7 internal diameter, m；
Gas flow, m are mixed in Q-gas drainage pipe 73/ min, according in service life or length of service region most
Big value determines, and should have 1.2~1.8 (such as 1.25,1.3,1.35,1.4,1.45,1.5,1.55,1.6,165,1.7,1.75)
Redundancy；
In V-gas drainage pipe 7 mix gas mean flow rate, V=5~12m/s (such as 5.5m/s, 6m/s, 6.5m/s,
7m/s、7.5m/s、8m/s、8.5m/s、9m/s、9.5m/s、10m/s、10.5m/s、11m/s、11.5m/s)。
Wherein the drainage holes on gas drainage pipe 7 are located at the same side of the length direction of gas drainage pipe 7, such top plate and
Drainage holes on bottom plate are arranged in opposite directions, can be connected together up and down, aspectant progress negative pressure extraction, are formed described in the present invention
" face formula " extraction also forms one and blocks up virtual extraction wall 8, and the goaf that the gas in goaf 4 generates gushes out gas 3 can
Fallen by gas drainage pipe 7 by drainage holes negative pressure extraction.
As shown in fig. 6, wherein the diameter of drainage holes becomes larger along the length direction of gas drainage pipe 7, that is, it is being located at work
The aperture for making the drainage holes of the gas drainage pipe 7 at face 1 is larger, and the aperture of the drainage holes in goaf 4 is relatively small, has
One gradient transition, guarantees the harmony of extracting result；In addition, by National Standard of the People's Republic of China GB50471-2008
" coal mine gas drainage engineering design code " is it is found that the frictional resistance of extraction pipeline is inversely proportional with extraction caliber, with gas drainage
The length of pipe 7 is directly proportional, and the diameter of extraction borehole becomes larger along the length direction of gas drainage pipe 7, can reduce end pumping
The drag losses of borehole guarantee the consistency of extraction pipeline extracting result.
The arrangement of S2, gas drainage pipe 7: gob side entry retaining artificial fire dam 6 construct before, fire dam 6 top plate and
Bottom plate is respectively separated reserved gas drainage pipe 7, can be specific according to mine working face when determining the length of gas drainage pipe 7
The length of the band that leaks out be determined, i.e., the area that interview extraction is covered is greater than working face and leaks out the area of band, so
It is avoided that the dead angle of extraction.
According to the gas density that goaf 4 discharges, one time or more times gas can be respectively arranged on top plate and bottom plate
Drainage tube 7, when arrangement one plows gas drainage pipe 7: gas drainage pipe 7 has twice, and gas drainage pipe 7 is respectively positioned at close twice
The first gas pumping for closing 6 top plate of wall adopts pipe 701 and the second gas drainage pipe 702 positioned at 6 bottom plate of fire dam.First gas drainage
The first drainage holes 901 and the second drainage holes 902 are offered on the length direction of pipe 701 and the second gas drainage pipe 702 respectively.The
One drainage holes 901 are located at the downside of the first gas drainage pipe 701, and second drainage holes 902 are located at the second gas drainage pipe 702
Upside, the first drainage holes 901 and the second drainage holes 902 arrangement in opposite directions.First gas drainage pipe 701 and the second gas drainage pipe
702 end is respectively positioned in working face 1, and the aperture of the first drainage holes 901 and the second drainage holes 902 by working face 1 to mined out
Area 4 gradually becomes smaller.
When arrangement gas drainage pipe 7 at least twice: being provided on the top plate and bottom plate of fire dam 6 at least twice watt
This drainage tube 7, increased gas drainage pipe 7 can be arranged in the centre of top plate and ground bottom plate drainage tube road, this increased part
Drainage holes are arranged in the two sides up and down of extraction pipeline, so that the extraction pipeline neighbouring with it forms extraction wall, further increase
Big extraction amount.On the top plate and bottom plate of fire dam 6 at least gas drainage pipe 7 is arranged side by side on cross section twice, in this way
Drainage holes on cross section upper plate and bottom plate are just able to maintain opposite arrangement, form " face formula " extraction.When on cross section simultaneously
When arrangement is set more than gas drainage pipe 7 twice, the two sides up and down of intermediate gas drainage pipe 7 are both needed to open up gas drainage hole, this
Sample gas drainage pipe in the up-down direction extraction when could have a connecting, and final extraction pipeline adjacent thereto forms extraction
Wall.
It equally, can be along first group of extraction wall to mined out if a stifled extraction wall extraction amount deficiency needs to increase extraction amount
Area direction increases more stifled extraction walls, improves extraction amount.
The extraction of S3, gas: gas drainage pipe 7 is connected to main extraction pipeline, is opened gas drainage pump and is carried out extraction.
From the above, it can be seen that the present invention operate in the specific implementation it is relatively simple, it is only necessary in the top plate and bottom plate of fire dam 6
Upper gas drainage pipe 7 of the arrangement with drainage holes, the drainage holes on gas drainage pipe 7 are arranged in opposite directions, form " face formula " extraction, thus
The gas drainage for the release lost in coal 5 is fallen；More times gas can be reserved when the density for the gas that goaf 4 is saved bit by bit is larger to take out
Pipe 7 is adopted, so that the gas drainage to transfinite be fallen.The present invention has construction is simple, extracting result equilibrium, strong applicability, safety high
The advantages of effect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Mind and principle within, any modification, equivalent replacement, improvement and so on, accompanying claims protection scope of the present invention it
It is interior.
Claims (6)
1. a kind of face formula pumping method based on gob side entry retaining gas control, which is characterized in that the face formula pumping method includes
Following steps:
The production of S1, gas drainage pipe: taking gas drainage pipe, opens up multiple drainage holes along the length direction of gas drainage pipe；
The diameter of the drainage holes becomes larger along the length direction of gas drainage pipe；
The arrangement of S2, gas drainage pipe: before the artificial fire dam construction of gob side entry retaining, distinguish in the top plate and bottom plate of fire dam
It is spaced reserved gas drainage pipe；
The gas drainage pipe has twice, and gas drainage pipe is respectively the first gas drainage pipe for being located at closed wall top plate twice
With the second gas drainage pipe for being located at fire dam bottom plate；
The first drainage holes and second are offered respectively on the length direction of the first gas drainage pipe and the second gas drainage pipe
Drainage holes；
First drainage holes are located at the downside of the first gas drainage pipe, and second drainage holes are located at the second gas drainage pipe
Upside, the first drainage holes and the second drainage holes are arranged in opposite directions；
The extraction of S3, gas: gas drainage Guan Yuzhu extraction pipeline is connected to, and is opened gas drainage pump and is carried out extraction.
2. a kind of face formula pumping method based on gob side entry retaining gas control as described in claim 1, which is characterized in that described
Drainage holes are located at the same side of the length direction of gas drainage pipe.
3. a kind of face formula pumping method based on gob side entry retaining gas control as described in claim 1, which is characterized in that described
The internal diameter of gas drainage pipe is d,Wherein:
D-gas drainage pipe internal diameter, m；
Gas flow, m are mixed in Q-gas drainage pipe3/ min, it is true according to the maximum value in service life or length of service region
Determine, and there should be 1.2~1.8 redundancy；
Gas mean flow rate, V=5~12m/s are mixed in V-gas drainage pipe.
4. a kind of face formula pumping method based on gob side entry retaining gas control as described in claim 1, which is characterized in that described
The end of first gas drainage pipe and the second gas drainage pipe is respectively positioned in working face, and the first drainage holes and the second drainage holes
Aperture is gradually become smaller by working face to goaf.
5. a kind of face formula pumping method based on gob side entry retaining gas control as described in claim 1, which is characterized in that described
At least gas drainage pipe twice is provided on the top plate and bottom plate of fire dam.
6. a kind of face formula pumping method based on gob side entry retaining gas control as claimed in claim 5, which is characterized in that described
On the top plate and bottom plate of fire dam at least gas drainage pipe is arranged side by side on cross section twice.
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| CN111852391A (en) * | 2020-08-07 | 2020-10-30 | 中煤科工集团重庆研究院有限公司 | Self-adaptive deformation gas extraction drilling and hole sealing device |
| CN111852392A (en) * | 2020-08-07 | 2020-10-30 | 中煤科工集团重庆研究院有限公司 | Gas extraction borehole leak detection and progressive secondary hole sealing device and using method |
| CN113550782B (en) * | 2021-08-20 | 2022-11-29 | 太原理工大学 | Gob-side entry retaining working face goaf gas and natural ignition composite disaster treatment method |
| CN114858224B (en) * | 2022-07-08 | 2022-10-14 | 山西中能华信矿业技术有限公司 | Extraction device and method for mine operation gas detection |
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| CN103775127B (en) * | 2013-12-31 | 2015-09-23 | 中国矿业大学 | A kind of low-permeable high gas layer group topping Comprehensive Gas Control method |
| CN104564072B (en) * | 2015-01-14 | 2017-01-18 | 中国矿业大学 | Complete non-coal-pillar continuous depressurized mining method for close-distance coal seam groups |
| CN104727847B (en) * | 2015-01-14 | 2016-11-02 | 中国矿业大学 | Filled wall is from the gob-side entry retaining method without coal column eliminated |
| CN105927270A (en) * | 2016-07-05 | 2016-09-07 | 重庆大学 | Gas extraction method for parallel hole arrangement of L-shaped drilling and fracturing weakening top plate |
| CN106194245A (en) * | 2016-09-29 | 2016-12-07 | 陈清泉 | A kind of three-in-one gas pumping method and structure thereof |
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Address after: 113122 No.11 Binhe Road, Shenfu demonstration area, Fushun City, Liaoning Province Patentee after: Shenyang Research Institute Co.,Ltd. Address before: 113122 No. 11 Binhe Road, Fushun Economic Development Zone, Fushun City, Liaoning Province Patentee before: CCTEG (China Coal Technology and Engineering Group Corp.) |