CN106150540B - Prevent the gas pumping method that transfinites in a kind of tunnel being progressively depressured - Google Patents
Prevent the gas pumping method that transfinites in a kind of tunnel being progressively depressured Download PDFInfo
- Publication number
- CN106150540B CN106150540B CN201610511802.8A CN201610511802A CN106150540B CN 106150540 B CN106150540 B CN 106150540B CN 201610511802 A CN201610511802 A CN 201610511802A CN 106150540 B CN106150540 B CN 106150540B
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- Prior art keywords
- pressure break
- extraction
- drainage holes
- hole
- carried out
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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
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
The invention discloses a kind of tunnels being progressively depressured to prevent the gas pumping method that transfinites, and after being included in hydraulic fracturing anti-reflection, carries out gas pumping by pressure break hole and continues setting time；It determines pressure break zone of influence scope and pressure break zone of influence Edge Distance and the gas joint extraction number of joint extraction at least twice is carried out with pressure break hole and drainage holes；Centered on pressure break hole, the pressure break zone of influence is divided by central circular area and multiple annuluses with increasing radius；It is applied in central circular area and bores multiple drainage holes and sealing of hole；Joint extraction is carried out with drainage holes and pressure break hole；When the joint extraction number carried out is less than setting number, with it is upper once combine to apply in the adjacent annular region in extraction region bore multiple drainage holes, and to increased drainage holes sealing of hole；Continue extraction until joint extraction terminates.The invention has the advantages that mash gas pumping drilling applies brill safety, during for coal work tunnel, tunnel gas exceeding limit hidden danger can be effectively reduced or eliminated.
Description
Technical field
The present invention relates to a kind of coal-bed gas gas pumping method, the gas pumping that transfinites is prevented in especially a kind of tunnel being progressively depressured
Mining method.
Background technology
Coal-bed gas is a kind of clear energy sources, but is even more a kind of disaster source for coal production.The coal preservation in China
Complex geologic conditions rely primarily on underground mining, and with the increase of mining depth, coal seam gas-bearing capacity gradually increases, coal seam watt
This pressure increases, and prominent danger increases, and protrusion-dispelling difficulty is increasing.Existing coal working face gas pumping is to pass through respectively
Concordant drilling is played in transportation roadway and air return lane in this coal seam and carries out extraction.For the poor coal seam of gas permeability usually need to also into
Row extraction again after row hydraulic fracturing anti-reflection.Existing pumping method is, after pressure break, is uniformly applied in the pressure break zone of influence and bores multiple pumpings
It adopts hole and carries out extraction.Since the displacement for not taking into full account pressure break medium acts on so that away from pressure break hole in the pressure break zone of influence
Endless belt in one distance range forms gas density and pressure is significantly higher than the gas accumulation area of original concentration and pressure.It is but existing
The gas concentrated area is not accounted in the boring procedure of some pumping methods, does not consider the increased influence of gas density, because
, when applying brill drainage holes, there is spray and bore and Gas Outburst danger in this.For this reason, it may be necessary to gas pumping technique is improved.
The content of the invention
The purpose of the present invention is being directed to the deficiency of existing drainage from coal seam technology, a kind of tunnel being progressively depressured is provided and prevents surpassing
Gas pumping method is limited, this method is in a manner of extend outwardly centered on pressure break hole progressively drilling and extraction, gradually to drop
Low accumulation regions gas density, tunnel gas exceeding limit during so as to effectively prevent through tunnel extraction, it is ensured that extraction safety.
To achieve the above object, the present invention adopts the following technical scheme that：
The gas pumping method that transfinites is prevented in a kind of tunnel being progressively depressured, and comprises the following steps：
The first step after hydraulic fracturing anti-reflection is carried out by pressure break hole, carries out gas pumping by pressure break hole, and continues extraction
To the first setting time；
Second step determines that pressure break zone of influence scope and pressure break influence area edge away from pressure break hole minimum range L and with pressure break
Hole and drainage holes carry out the gas joint extraction times N of joint extraction at least twice；And centered on pressure break hole, using L/N to pass
Increase radius and the pressure break zone of influence is divided into central circular area and multiple annuluses；
3rd step is applied in the central circular area and bores multiple drainage holes, and multiple drainage holes are carried out by extraction requirement
Sealing of hole；
4th step carries out gas joint extraction to all drainage holes and pressure break hole, and continues extraction to the second setting time；
5th step judges the joint extraction number carried out, when the joint extraction number carried out is less than N, carries out down
One step；When the joint extraction number carried out is equal to N, terminate extraction；
6th step, with it is upper once combine to apply in the adjacent annular region in extraction region bore multiple drainage holes, and to increasing
Drainage holes by extraction requirement carry out sealing of hole；
7th step returns to the 4th step, until joint extraction terminates.
Using the present invention of preceding solution, by the progressively widened extraction scope centered on pressure break hole, gradually take out
The device in Gas in coal seam is arranged, the gas pressure and concentration for making gas Nesting Zone gradually reduce, and before each expanded scope extraction,
Construction drainage holes, therefore, drainage holes apply brill and progressively the gas Nesting Zone of convergence high pressure and high concentration, can effectively eliminate
Or the spray of gas Nesting Zone drilling construction is avoided to bore phenomenon, it is ensured that safety is bored in empty the applying of gas pumping.For heading extraction
When, it can effectively reduce or eliminate tunnel gas exceeding limit hidden danger.
Preferably, the joint extraction times N is 3~5 natural number.To adapt to the existing anti-reflection zone of influence in most of coal seams
For the needs of 30~50 meters of radius.
Preferably, the number that the setting time of the 4th step is carried out with joint extraction increases and is gradually shortened.To have
Effect is avoided in the case of spray brill danger occurs, and improves extraction efficiency.
Preferably, the increasing radius is 8~12 meters.To be suitable for existing most of coal seam needs, and can effectively ensure
Extraction borehole safety.
Compared with the prior art, the invention has the advantages that mash gas pumping drilling applies brill safety, for coal work lane
During road, tunnel gas exceeding limit hidden danger can be effectively reduced or eliminated.
Description of the drawings
Fig. 1 is the arrangement schematic diagram of hydraulic fracturing hole and extraction borehole in the present invention.
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings, but does not therefore limit the present invention to the implementation
Among scope.
Referring to Fig. 1, the gas pumping method that transfinites is prevented in a kind of tunnel being progressively depressured, and is carried out in heading, including following
Step：
The first step after hydraulic fracturing anti-reflection is carried out by pressure break hole 1, carries out gas pumping by pressure break hole 1, and continues to take out
It adopts to the first setting time；
Second step, determine pressure break zone of influence scope and pressure break influence area edge away from 1 minimum range L=40m of pressure break hole and
Gas joint extraction times N=4 of joint extraction at least twice are carried out with pressure break hole 1 and drainage holes 2；And in pressure break hole 1 being
The pressure break zone of influence is divided into central circular area and multiple annuluses by the heart using L/N=10m as increasing radius；
3rd step centered on pressure break hole 1, and is applied in the central circular area that radius is 10m and bores multiple drainage holes
2, and sealing of hole is carried out by extraction requirement to multiple drainage holes 2；
4th step carries out gas joint extraction to all drainage holes 2 and pressure break hole 1, and when continuing extraction to the second setting
Between；
5th step judges the joint extraction number carried out, and when the joint extraction number carried out is less than N, i.e., joint is taken out
When adopting less than 4 times, carry out in next step；When the joint extraction number carried out is equal to N, i.e., after joint extraction has reached 4 times, knot
Beam extraction；
6th step, with it is upper once combine to apply in the adjacent annular region in extraction region bore multiple drainage holes 2, and to increasing
Drainage holes 2 carry out sealing of hole by extraction requirement；After completing joint extraction in central circular area, in the way of gradually expanding outwardly,
The construction drainage holes 2 in adjacent new annular region；
7th step returns to the 4th step, until joint extraction terminates.
In the present embodiment, properties and the pressure break zone of influence magnitude range such as breathed freely according to coal seam, wherein, joint extraction
Number usually also can be selected 2,3,5 or 6 etc. repeatedly；Obviously, the increasing radius of joint extraction also may be selected in 8~12m in addition to 10m
Other values.
During the joint extraction of the present embodiment, with the increase of joint extraction number, the corresponding extraction duration is suitable
It is appropriate to shorten.
Although combining attached drawing above describes embodiments of the present invention, those of ordinary skill in the art can also
Recognize to various changes can be made in scope of the appended claims or modification, these modifications and variations are understood as in this hair
Within bright scope and intention.
Claims (4)
1. the gas pumping method that transfinites is prevented in a kind of tunnel being progressively depressured, which is characterized in that comprises the following steps：
The first step, by pressure break hole（1）After carrying out hydraulic fracturing anti-reflection, pass through pressure break hole（1）Gas pumping is carried out, and continues to take out
It adopts to the first setting time；
Second step determines that pressure break zone of influence scope and pressure break influence area edge away from pressure break hole（1）Minimum range L and with pressure break
Hole（1）And drainage holes（2）Carry out the gas joint extraction times N of joint extraction at least twice；And with pressure break hole（1）Centered on,
The pressure break zone of influence is divided into central circular area and multiple annuluses using L/N as increasing radius；
3rd step is applied in the central circular area and bores multiple drainage holes（2）, and to multiple drainage holes（2）By extraction requirement into
Row sealing of hole；
4th step, to all drainage holes（2）With pressure break hole（1）When carrying out gas joint extraction, and continuing extraction to the second setting
Between；
5th step judges the joint extraction number carried out, when the joint extraction number carried out is less than N, carries out in next step；
When the joint extraction number carried out is equal to N, terminate extraction；
6th step, with it is upper once combine to apply in the adjacent annular region in extraction region bore multiple drainage holes（2）, and to increased
Drainage holes（2）Sealing of hole is carried out by extraction requirement；
7th step returns to the 4th step, until joint extraction terminates.
2. the gas pumping method that transfinites is prevented in the tunnel according to claim 1 being progressively depressured, which is characterized in that the joint
Extraction times N is 3~5 natural number.
3. the gas pumping method that transfinites is prevented in the tunnel according to claim 1 being progressively depressured, which is characterized in that in the 4th step
In the number that is carried out with joint extraction of the setting time increase and be gradually shortened.
4. the gas pumping method that transfinites, feature are prevented in the tunnel being progressively depressured according to any one in claims 1 to 3
It is, the increasing radius is 8~12 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610511802.8A CN106150540B (en) | 2016-07-01 | 2016-07-01 | Prevent the gas pumping method that transfinites in a kind of tunnel being progressively depressured |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610511802.8A CN106150540B (en) | 2016-07-01 | 2016-07-01 | Prevent the gas pumping method that transfinites in a kind of tunnel being progressively depressured |
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| Publication Number | Publication Date |
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| CN106150540A CN106150540A (en) | 2016-11-23 |
| CN106150540B true CN106150540B (en) | 2018-05-22 |
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| CN201610511802.8A Active CN106150540B (en) | 2016-07-01 | 2016-07-01 | Prevent the gas pumping method that transfinites in a kind of tunnel being progressively depressured |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107676126B (en) * | 2017-10-16 | 2019-01-29 | 重庆大学 | It is a kind of to utilize the concordant region hydraulic fracturing method for intercepting control |
| CN109577934A (en) * | 2018-11-29 | 2019-04-05 | 中国矿业大学(北京) | A kind of coal seam anti-reflection method using anaerobic methane oxidation bacterium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403314A (en) * | 2008-11-18 | 2009-04-08 | 河南理工大学 | Coal mine down-hole drilling hydraulic fracturing anti-reflection mash gas extraction technique |
| CN101666241A (en) * | 2009-09-05 | 2010-03-10 | 中国矿业大学 | Integrated drilling-blasting-pressurizing-drawing protrusion preventing method for regional gas control |
| RU2395690C1 (en) * | 2009-03-05 | 2010-07-27 | Владимир Александрович Зуев | Method for control of gas release from stripped area |
| CN103397900A (en) * | 2013-07-15 | 2013-11-20 | 中国矿业大学 | Porous collaborative fracturing and extracting integrated gas extraction method |
-
2016
- 2016-07-01 CN CN201610511802.8A patent/CN106150540B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403314A (en) * | 2008-11-18 | 2009-04-08 | 河南理工大学 | Coal mine down-hole drilling hydraulic fracturing anti-reflection mash gas extraction technique |
| RU2395690C1 (en) * | 2009-03-05 | 2010-07-27 | Владимир Александрович Зуев | Method for control of gas release from stripped area |
| CN101666241A (en) * | 2009-09-05 | 2010-03-10 | 中国矿业大学 | Integrated drilling-blasting-pressurizing-drawing protrusion preventing method for regional gas control |
| CN103397900A (en) * | 2013-07-15 | 2013-11-20 | 中国矿业大学 | Porous collaborative fracturing and extracting integrated gas extraction method |
Non-Patent Citations (1)
| Title |
|---|
| 穿层钻孔煤巷条带水力压裂防突技术及应用;袁志刚等;《重庆大学学报》;20160229;第39卷(第1期);72-77 * |
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| CN106150540A (en) | 2016-11-23 |
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Inventor after: Li Dong Inventor after: Zhou Dongping Inventor after: Guo Chenye Inventor after: Liu Mingyuan Inventor after: Huang Changwen Inventor after: He Hua Inventor after: Wang Biao Inventor after: Du Xiaohua Inventor after: Ren Meiqing Inventor before: Zhou Dongping Inventor before: Guo Chenye Inventor before: Li Dong Inventor before: Liu Mingyuan Inventor before: Huang Changwen Inventor before: He Hua Inventor before: Wang Biao Inventor before: Du Xiaohua Inventor before: Ren Meiqing |
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Effective date of registration: 20180320 Address after: Nanbin road 400060 Chongqing Nan'an District No. 162 Building 2 floor 12 Applicant after: Chongqing Energy Technology Investment Group Co., Ltd. Applicant after: CHONGQING ENERGY INVESTMENT GROUP CO., LTD. Applicant after: CHONGQING NANTONG MINING INDUSTRY CO., LTD. Applicant after: Chongqing University Address before: Nanbin road 400060 Chongqing Nan'an District No. 162 Building 2 floor 12 Applicant before: Chongqing Energy Technology Investment Group Co., Ltd. Applicant before: CHONGQING ENERGY INVESTMENT GROUP CO., LTD. Applicant before: CHONGQING NANTONG MINING INDUSTRY CO., LTD. |
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