CN107575262A - A kind of quick extraction is adopted distressed zone and underlied the method for coal-bed gas - Google Patents
A kind of quick extraction is adopted distressed zone and underlied the method for coal-bed gas Download PDFInfo
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- CN107575262A CN107575262A CN201710638661.0A CN201710638661A CN107575262A CN 107575262 A CN107575262 A CN 107575262A CN 201710638661 A CN201710638661 A CN 201710638661A CN 107575262 A CN107575262 A CN 107575262A
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Abstract
The invention belongs to control of coalmine gas technical field, specifically a kind of quick extraction is adopted distressed zone and underlied the method for coal-bed gas.Solve the problems, such as underlying seam gas control, comprise the following steps that, 1. well spacing is arranged：2. ground drilling：3. ground extraction.Present invention superjacent adopts release effect, the coal seam in the relief range of bottom can construction level well not pressure break, reach the purpose of quick mash gas extraction.
Description
Technical field
The invention belongs to control of coalmine gas technical field, specifically a kind of quick extraction is adopted distressed zone and underlied coal seam watt
This method.
Background technology
According to software analog study and mine actual feedback, in mine superjacent exploitation process, under most mines to
Release distance is up to 50~80m.National associated documents regulation, the coal area in preparation in coal seam gas-bearing capacity for 8-16 cubic meters/ton,
The principle of coal exploitation is served according to cbm development, the mode such as cooperation or adjustment coal bed gas mineral properties scope is taken, increases
Extraction dynamics, preferentially ensures Coal Resource Development.Treat that coal seam gas-bearing capacity is dropped to below 8 cubic metres/ton, then development plan.Such as
Fruit underlying seam gas bearing capacity is higher than 8 cubic metres/ton of national regulation, it is necessary to carry out ground gas improvement in advance.Coal and coal seam
Qi Gongcai National Key Laboratories develop correlation technique.
The content of the invention
The present invention is in order to solve the problems, such as underlying seam gas control, there is provided a kind of quick extraction is adopted distressed zone and underlied coal
The method of layer gas.
Exploiting field following technical scheme of the present invention：A kind of quick extraction is adopted distressed zone and underlied the method for coal-bed gas, specifically
Step is as follows,
1. well spacing is arranged：Horizontal well is arranged into and treats actual mining Middle face, the well head of horizontal well arrives at the tunnel of panel surely, horizontal
The landing point of well positioned at stop adopting line with inner 70-90m at.
2. ground drilling：
1）One exploitation of horizontal well pierces stable basement rock 10m, tripping in J55 grade of steel Φ 273.1mm top layers with Φ 311.15mm drill bits
Sleeve pipe, cementing concrete return to ground；
2）Two exploitations of horizontal well are crept into purpose roof above 5m with 241.3mm drill bits, tripping in N80 grade of steels Φ
193.7mm protective casings, cementing concrete return to ground；
3）Horizontal well three exploitation with Φ 171.5mm drill bits creep into, into target coal seam after along drilling in coal, reach target spot model
Enclose.The combination of the Petroleum screen tube ＆ production casings of horizontal segment tripping in Φ 139.7mmN80 grade of steels, does not cement the well, not pressure break.
3. ground extraction, horizontal well is to adopt release effect using main mining coal seam to carry out ground extraction, ground to coal seam of underliing
Face do not fill extraction equipment observation horizontal well aerogenesis situation, if not aerogenesis, using endoscope to gas well carry out liquid level spy on, as because
The higher influence aerogenesis of liquid level, using the processing mode of purging, if processing is invalid to consider further that jet pump mining equipment is installed on ground
Carry out draining.
Compared with prior art, the release of adopting of present invention superjacent acts on, and the coal seam in the relief range of bottom can
Construction level well not pressure break, reach the purpose of quick mash gas extraction.From gas control angle, if distressed zone underlying seam gas
Content is higher, and ton coal gas bearing capacity, which needs to be reduced to 8 cubic metres/ton, could carry out coal development plan, meets the related political affairs of country
The requirement of plan.
Embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
A kind of quick extraction is adopted distressed zone and underlied the method for coal-bed gas, comprises the following steps that,
1. well spacing is arranged：Horizontal well is arranged into and treats actual mining Middle face, the well head of horizontal well arrives at the tunnel of panel surely, horizontal
The landing point of well positioned at stop adopting line with inner 70-90m at.
2. ground drilling：
1）One exploitation of horizontal well pierces stable basement rock 10m, tripping in J55 grade of steel Φ 273.1mm top layers with Φ 311.15mm drill bits
Sleeve pipe, cementing concrete return to ground；
2）Two exploitations of horizontal well are crept into purpose roof above 5m with 241.3mm drill bits, tripping in N80 grade of steels Φ
193.7mm protective casings, cementing concrete return to ground；
3）Horizontal well three exploitation with Φ 171.5mm drill bits creep into, into target coal seam after along drilling in coal, reach target spot model
Enclose.The combination of the Petroleum screen tube ＆ production casings of horizontal segment tripping in Φ 139.7mmN80 grade of steels, does not cement the well, not pressure break.
3. ground extraction, horizontal well is to adopt release effect using main mining coal seam to carry out ground extraction, ground to coal seam of underliing
Face do not fill extraction equipment observation horizontal well aerogenesis situation, if not aerogenesis, using endoscope to gas well carry out liquid level spy on, as because
The higher influence aerogenesis of liquid level, using the processing mode of purging, if processing is invalid to consider further that jet pump mining equipment is installed on ground
Carry out draining.Therefore, its ground extraction and aerogenesis processing mode is not：Directly take out --- spying on --- purging or ground extraction is set
It is standby to draw water.
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art,
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacing, within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., this should be included in
Within the protection domain of invention.
Claims (2)
- Underlie the method for coal-bed gas 1. distressed zone is adopted in a kind of quick extraction, it is characterised in that：Comprise the following steps that,1. well spacing is arranged：Horizontal well is arranged into and treats actual mining Middle face, the well head of horizontal well arrives at the tunnel of panel surely, horizontal The landing point of well positioned at stop adopting line with inner 70-90m at；2. ground drilling：1）One exploitation of horizontal well pierces stable basement rock 10m, tripping in J55 grade of steel Φ 273.1mm top layers with Φ 311.15mm drill bits Sleeve pipe, cementing concrete return to ground；2）Two exploitations of horizontal well are crept into purpose roof above 5m with 241.3mm drill bits, tripping in N80 grade of steels Φ 193.7mm protective casings, cementing concrete return to ground；3）Horizontal well three exploitation with Φ 171.5mm drill bits creep into, into target coal seam after along drilling in coal, reach target spot model Enclose.
- 2. the combination of the Petroleum screen tube ＆ production casings of horizontal segment tripping in Φ 139.7mmN80 grade of steels, does not cement the well, not pressure break；3. ground extraction, horizontal well is to adopt release effect using main mining coal seam to carry out ground extraction to coal seam of underliing, and ground is not Extraction equipment observation horizontal well aerogenesis situation is filled, if not aerogenesis, liquid level is carried out to gas well using endoscope and spied on, such as because of liquid level Higher influence aerogenesis, using the processing mode of purging, if processing is invalid to consider further that ground installation jet pump mining equipment is carried out Draining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710638661.0A CN107575262B (en) | 2017-07-31 | 2017-07-31 | A kind of quick extraction adopts distressed zone and underlies the method for coal-bed gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710638661.0A CN107575262B (en) | 2017-07-31 | 2017-07-31 | A kind of quick extraction adopts distressed zone and underlies the method for coal-bed gas |
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| CN107575262A true CN107575262A (en) | 2018-01-12 |
| CN107575262B CN107575262B (en) | 2019-06-21 |
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Cited By (2)
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| CN111980631A (en) * | 2020-08-11 | 2020-11-24 | 太原理工大学 | Method for collaborative gas extraction of goaf and underlying coal seam |
| CN112593912A (en) * | 2020-12-14 | 2021-04-02 | 山西晋城无烟煤矿业集团有限责任公司 | Coal bed gas horizontal well power expanding, pressure relief and permeability increase extraction method |
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| Publication number | Publication date |
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| CN107575262B (en) | 2019-06-21 |
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