CN104121012B - A kind of assay method determining drilling-draining radius - Google Patents
A kind of assay method determining drilling-draining radius Download PDFInfo
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- CN104121012B CN104121012B CN201410363660.6A CN201410363660A CN104121012B CN 104121012 B CN104121012 B CN 104121012B CN 201410363660 A CN201410363660 A CN 201410363660A CN 104121012 B CN104121012 B CN 104121012B
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Abstract
The invention discloses a kind of assay method determining drilling-draining radius, it comprises the steps: that step 1, one side or the multi-lateral in extraction hole (2) are bored one and listed and indexed verify (3)；Step 2, the standard specimen gas injecting heterogeneity in each inspection hole (3) or liquid, by tight for inspection hole (3) closure；Step 3, utilize drainage pump that extraction hole (2) are carried out extraction；Step 4, extraction terminate the standard specimen gas in post analysis extraction hole (2) or liquid component；Namely step 5, composition according to extraction hole (2) interior standard specimen gas or liquid component can determine that the standard specimen gas of several inspection hole (3) or liquid enter in extraction hole (2), thus when obtaining this negative pressure of suction value according to the quantity of inspection hole (3), the drainage radius value of extraction hole (2)；The invention solves the determination of prior art drilling-draining radius and pass through Theoretical Calculation length consuming time and complicated, general field worker can not be grasped, but determines the problems such as drilling-draining radius error is bigger at extraction scene mainly through the artificial experience estimation technique.
Description
Technical field
The invention belongs to drilling-draining radius assay method, particularly relate to a kind of assay method determining drilling-draining radius.
Background technology
Its gas drainage results and drilling construction amount are had important impact, drainage radius parameter to be the factors first having in drainage scheme determine by the drainage radius of extraction boring.Owing under different occurrence conditions, geological structure difference and negative pressure of suction, difference causes drainage radius parameter also to differ, can pass through to be obtained by Theoretical Calculation in conjunction with geology constructing variable etc. to the determination of drilling-draining radius parameter at present, but actual job site boring radius determination due to Theoretical Calculation complicated and time consumption long, and field condition also disapproves, main still by the artificial experience estimation technique, but this method error is relatively big, and the drainage radius parameter estimated is not suitable for the extraction under physical condition.
Summary of the invention
The technical problem to be solved in the present invention: a kind of assay method determining drilling-draining radius is provided, determination to solve present drilling-draining radius passes through Theoretical Calculation length consuming time and complicated, general field worker can not be grasped, but determines the problems such as drilling-draining radius error is bigger at extraction scene mainly through the artificial experience estimation technique.
Technical solution of the present invention:
A kind of assay method determining drilling-draining radius, it comprises the steps:
Step 1, one side or the multi-lateral in extraction hole are bored one and are listed and indexed and verify；
Step 2, the standard specimen gas injecting heterogeneity in each inspection hole or liquid, by tight for inspection hole closure；
Step 3, utilize drainage pump that extraction hole is carried out extraction；
Step 4, extraction terminate the standard specimen gas in post analysis extraction hole or liquid component；
Step 5, the standard specimen gas that namely can determine that several inspection hole according to the composition of standard specimen gas or liquid component in extraction hole or liquid enter in extraction hole, thus when obtaining this negative pressure of suction value according to the quantity of inspection hole, the drainage radius value in extraction hole.
Equidistantly distributing between adjacent inspection hole, the distance between adjacent inspection hole is 300-800 millimeter, and aperture is 75mm ~ 115mm.
Spacing between adjacent inspection hole is 500mm, and aperture is 75mm.
The quantity of inspection hole is no less than 3.
The quantity of inspection hole is 5.
The negative pressure of suction of drainage pump is 13-20KPa, and the extraction time is 24 hours.
The negative pressure of suction of drainage pump is 20KPa, and the extraction time is 24 hours.
Beneficial effects of the present invention:
The inventive method is simple to operate, determination data is accurate, the drilling-draining radius under certain geological conditions and certain negative pressure of suction can be accurately judged by the standard specimen gas in detection extraction hole or liquid component, the determination efficiently solving prior art drilling-draining radius passes through Theoretical Calculation length consuming time and complicated, general field worker can not be grasped, but determines the problems such as drilling-draining radius error is bigger at extraction scene mainly through the artificial experience estimation technique.
Accompanying drawing illustrates:
Fig. 1 is the schematic top plan view of the present invention；
Fig. 2 is the I I profile of Fig. 1；
Detailed description of the invention:
A kind of assay method determining drilling-draining radius, it comprises the steps:
Step 1, one side or the multi-lateral in extraction hole 2 are bored one and are listed and indexed and verify 3；Equidistantly distribute between adjacent inspection hole 3, in order to prevent between inspection hole 3 because pitch of holes is little, cause " string hole " phenomenon, pitch of holes is excessive affects the problems such as drainage radius precision, distance between adjacent inspection hole 3 is 300-800 millimeter by the present invention, the preferred 500mm of spacing between adjacent inspection hole 3；To guarantee the mensuration accuracy of the drainage radius in extraction hole.In order to solve inspection hole efficiency of construction problem, aperture being set to 75mm ~ 115mm, the preferred 75mm in aperture, to realize rapidly and efficiently holing.
Step 2, in each inspection hole 3, inject standard specimen gas or the liquid of heterogeneity, and inspection hole 3 is blocked tightly；
Step 3, utilizing drainage pump that extraction hole 2 is carried out extraction, standard specimen gas or liquid in inspection hole are then entered in extraction hole 2 by gap, coal seam 1.
Note: standard specimen gas or liquid refer to gas or the abbreviation of liquid standard sample.
Step 4, extraction terminate the standard specimen gas in post analysis extraction hole 2 or liquid component；
Step 5, the standard specimen gas that namely can determine that several inspection hole 3 according to the composition of standard specimen gas or liquid component in extraction hole 2 or liquid enter in extraction hole 2, thus according to inspection hole 3 penetrate into the quantity of gas or liquid in extraction hole 2 obtain this negative pressure of suction value when, the drainage radius value in extraction hole 3.
In order to ensure the accuracy of drainage radius measured value, inspection hole 3 number must not less than 3, under 20Kpa negative pressure of suction, it is preferable that 5.
The negative pressure of suction value of the drainage pump described in step 3 is 13-20KPa, is typically chosen 20KPa, and the extraction time is 24 hours.The selection of extraction time is unsuitable too small, and the too small drainage radius that can not accurately measure extraction hole, the extraction time is excessive, can affect measurement efficiency.
Adopting the present invention can convenient, fast and accurate detect at the drilling-draining radius when certain negative pressure of suction value, this method effectively solves because artificially estimating the problem causing error bigger, and the method is less costly, and simply, convenient, result is accurate.
Claims (7)
1. determining an assay method for drilling-draining radius, it comprises the steps:
Step 1, one side or the multi-lateral in extraction hole (2) are bored one and are listed and indexed verify (3)；
Step 2, the standard specimen gas injecting heterogeneity in each inspection hole (3) or liquid, by tight for inspection hole (3) closure；
Step 3, utilize drainage pump that extraction hole (2) are carried out extraction；
Step 4, extraction terminate the standard specimen gas in post analysis extraction hole (2) or liquid component；
Namely step 5, composition according to extraction hole (2) interior standard specimen gas or liquid component can determine that the standard specimen gas of several inspection hole (3) or liquid enter in extraction hole (2), thus when obtaining this negative pressure of suction value according to the quantity of inspection hole (3), the drainage radius value of extraction hole (2).
2. a kind of assay method determining drilling-draining radius according to claim 1, it is characterised in that: adjacent inspection hole equidistantly distributes between (3), and the distance between adjacent inspection hole (3) is 300-800 millimeter, and aperture is 75mm ~ 115mm.
3. a kind of assay method determining drilling-draining radius according to claim 2, it is characterised in that: the spacing between adjacent inspection hole (3) is 500mm, and aperture is 75mm.
4. a kind of assay method determining drilling-draining radius according to claim 1, it is characterised in that: the quantity of inspection hole (3) is no less than 3.
5. a kind of assay method determining drilling-draining radius according to claim 4, it is characterised in that: the quantity of inspection hole (3) is 5.
6. a kind of assay method determining drilling-draining radius according to claim 1, it is characterised in that: the negative pressure of suction of the drainage pump described in step 3 is 13-20KPa, and the extraction time is 24 hours.
7. a kind of assay method determining drilling-draining radius according to claim 6, it is characterised in that: the negative pressure of suction of drainage pump is 20KPa, and the extraction time is 24 hours.
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| CN201410363660.6A CN104121012B (en) | 2014-07-29 | 2014-07-29 | A kind of assay method determining drilling-draining radius |
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| CN201410363660.6A CN104121012B (en) | 2014-07-29 | 2014-07-29 | A kind of assay method determining drilling-draining radius |
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| CN104121012A CN104121012A (en) | 2014-10-29 |
| CN104121012B true CN104121012B (en) | 2016-06-29 |
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| CN104847333A (en) * | 2015-05-14 | 2015-08-19 | 中煤科工集团重庆研究院有限公司 | Method for measuring coal seam gas extraction radius |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1011866A1 (en) * | 1981-09-18 | 1983-04-15 | Институт проблем комплексного освоения недр АН СССР | Method of degassing coal beds being mined |
| CN101824982A (en) * | 2010-04-19 | 2010-09-08 | 中国矿业大学 | Coal bed gas drainage effective radius measuring method |
| CN103134448A (en) * | 2013-01-29 | 2013-06-05 | 河南理工大学 | Test method of drill hole gas extraction effective radius |
| CN104121011A (en) * | 2014-07-16 | 2014-10-29 | 中煤科工集团重庆研究院有限公司 | Method for measuring effective extraction radius of drill hole based on gas content method |
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2014
- 2014-07-29 CN CN201410363660.6A patent/CN104121012B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1011866A1 (en) * | 1981-09-18 | 1983-04-15 | Институт проблем комплексного освоения недр АН СССР | Method of degassing coal beds being mined |
| CN101824982A (en) * | 2010-04-19 | 2010-09-08 | 中国矿业大学 | Coal bed gas drainage effective radius measuring method |
| CN103134448A (en) * | 2013-01-29 | 2013-06-05 | 河南理工大学 | Test method of drill hole gas extraction effective radius |
| CN104121011A (en) * | 2014-07-16 | 2014-10-29 | 中煤科工集团重庆研究院有限公司 | Method for measuring effective extraction radius of drill hole based on gas content method |
Non-Patent Citations (1)
| Title |
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| 瓦斯抽采半径确定方法的比较及存在问题研究;郝富昌等;《煤炭科学技术》;20121231(第12期);第55-58页 * |
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Inventor after: Wang Jie Inventor after: Xie Hongfei Inventor after: Huang Jin Inventor after: Li Hongsheng Inventor after: Xu Zaigang Inventor after: Zhang Huiyuan Inventor after: Yu Zhaoxing Inventor after: Yang Guangyou Inventor after: Zhu Chengtan Inventor after: Yao Chunlei Inventor after: Wei Yanjun Inventor after: Fu Chaodong Inventor before: Wang Jie Inventor before: Zhu Chengtan Inventor before: Zhang Huiyuan Inventor before: Wei Yanjun Inventor before: Yuan Xuejiang Inventor before: Hou Lin Inventor before: Xia Jisong Inventor before: Huang Jin |
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