CN105239964A - Protective coal seam decompressing ground and underground three-dimensional coal and coal seam gas coordinated development method - Google Patents
Protective coal seam decompressing ground and underground three-dimensional coal and coal seam gas coordinated development method Download PDFInfo
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Abstract
The invention provides a protective coal seam decompressing ground and underground three-dimensional coal and coal seam gas coordinated development method. The method includes: prospective planning, to be more specific, prospecting coal and coal seam gas resources, determining a protective coal seam by analyzing resource occurrence features, and arranging a coal seam gas drilling well on the ground to drain the coal seam gas of the protective coal seam; preparing, to be more specific, exploiting the coal of the protective coal seam when the coal seam gas content of the protective coal seam reaches the standard, performing local coal seam gas drainage on the protective coal seam, and pre-draining the coal seam gas of a target coal seam at the same time; producing, to be more specific, exploiting the coal of the target coal seam when the coal seam gas content of the target coal seam reaches the standard, and performing local coal seam gas drainage on the target coal seam at the same time. The method has the advantages that coal and coal seam gas development is planned reasonably, coal seam gas drainage and coal exploitation are orderly linked up, and accordingly the integrated and coordinated development of the coal and the coal seam gas is achieved; meanwhile, coal seam gas recovery efficiency is increased by the ground and underground combined three-dimensional drainage of the coal seam gas.
Description
Technical field
The present invention relates to coal-mining technique field, particularly the aboveground lower three-dimensional coal of a kind of topping release and coal bed gas coordinated development method.
Background technology
In coal mining work, coal seam group hosting geological condition is various, coal bed gas (gas) extraction and coal mining complex procedures, the adopting of coal bed gas extraction and coal production, dig, transport, prop up, pipe ring saves interrelated.Coal bed gas extraction is subject to the restriction of the aspects such as coal mining time sequencing, space layout, digging deployment.
At present in the mining work of coal to the extraction of coal bed gas, all carry out two stages, the 1 coal mining stage: adopt layer selection headed by coal mining divides by this stage, exploitation preparation, head adopt a layer coal back production, adjacent layer coal mining grade one-level is little stage, before coal mining, coal bed gas extraction is carried out, to reach national safety standard to the coal bed gas region that exceeds standard; 2, after-stage adopted by coal: the goaf formed in coal mining advance of the face process, and mainly with upper corner pipe laying extraction goaf coal bed gas, up to standard to ensure coal-face upper corner coal bed gas, ground and other roadway of mine are without extraction engineering.
Existing coal mining technique is only from the angle extraction coal bed gas of safety, rational coal and cbm development is not had to plan, there is no the time-space relationship of clear and definite harmonic extraction, coal bed gas extraction time, place and effect cannot be ensured, coal mining and coal bed gas extraction can not accomplish orderly linking, make coal mining produce the imbalance that continues, affect colliery normal safe and produce, and lack the complete technical system of the aboveground lower associating extraction of coal bed gas.
Summary of the invention
The object of this invention is to provide a kind of aboveground lower three-dimensional coal of topping release that coal and cbm development are made rational planning for and coal bed gas coordinated development method; the method can make coal bed gas extraction and coal mining be connected in order, can realize the aboveground lower associating extraction to coal bed gas simultaneously.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of aboveground lower three-dimensional coal of topping release and coal bed gas coordinated development method, comprising: perspective long-term plan step, carries out coal and coal bed gas resource is reconnoitred, and by analyzing resource enrichness feature, determine topping, and CBM Drilling is set on ground, pre-extraction is carried out to the coal bed gas of topping;
Preparation process, after the extraction of topping coal bed gas is up to standard, exploitation topping coal, and this layer of position coal bed gas extraction is carried out to topping, pre-extraction is carried out to destination layer coal bed gas simultaneously;
Production stage, after the extraction of destination layer coal bed gas is up to standard, exploitation destination layer coal, carries out this layer of position coal bed gas extraction to destination layer simultaneously.
Described topping is without outburst danger or the little girdle of outburst hazard.
More preferably, in described preparation process, this layer of position coal bed gas extraction is carried out to topping and comprises: carry out hole pumping and mining in the top board of topping, base plate and coal seam.
More preferably, in described preparation process, also comprise topping goaf extraction step, by the mode of the top plate drilling in topping goaf, pipe laying and ground drilling, extraction is carried out to the coal bed gas in topping goaf.
More preferably, in described production stage, this layer of position coal bed gas is carried out to destination layer and comprises: carry out hole pumping and mining in the top board of topping, base plate and coal seam.
More preferably, in described preparation process, pre-extraction is carried out to destination layer coal bed gas and comprises: utilize high-order drill site and/or suction road and/or concordant boring and/or layer-through drilling and/or surface well to carry out coal bed gas extraction to destination layer.
More preferably, in described production stage, also comprise destination layer goaf extraction step, by the mode of the top plate drilling in topping goaf, pipe laying and/or ground drilling, extraction is carried out to the coal bed gas in destination layer goaf.
More preferably, the quantity of described CBM Drilling is multiple, and it is the well pattern of 200 to 400 meters that multiple described CBM Drilling forms spacing.
More preferably, the quantity of described destination layer is at least one.
The invention has the beneficial effects as follows: can make rational planning for coal and cbm development, make coal bed gas extraction and coal mining accomplish orderly linking, the three-dimensional extraction of aboveground lower associating to coal bed gas can be realized simultaneously.
Accompanying drawing explanation
Fig. 1 is the aboveground lower three-dimensional coal of topping release of the present invention and coal bed gas coordinated development method flow diagram;
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the aboveground lower three-dimensional coal of topping release of the present invention and coal bed gas coordinated development method are further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1; a kind of aboveground lower three-dimensional coal of topping release and coal bed gas coordinated development method; comprise: perspective long-term plan step; carry out coal and coal bed gas resource is reconnoitred; and by analyzing resource enrichness feature; determine topping, and CBM Drilling is set on ground, pre-extraction is carried out to the coal bed gas of topping.
Preparation process, after the extraction of topping coal bed gas is up to standard, exploitation topping coal, and this layer of position coal bed gas extraction is carried out to topping, pre-extraction is carried out to destination layer coal bed gas simultaneously.
Production stage, after the extraction of destination layer coal bed gas is up to standard, exploitation destination layer coal, carries out this layer of position coal bed gas extraction to target simultaneously layer by layer.
In order to by coal and coal bed gas coordinated development in real work, Time and place reasonable arrangement is connected, working region can be divided into perspective long-term plan district, area in preparation, production area and goaf.
The perspective long-term plan district that is operated in that can be understood as in perspective long-term plan step implements, and preparation process is implemented in area in preparation, and production stage is implemented in production area.
In perspective long-term plan step; by routine work means, the coal of coal seam group and coal bed gas resource are reconnoitred to the determination of topping; according to prospecting results, resource enrichness feature is analyzed; after drawing analysis result, selecting without outburst danger or little (thin) coal seam of outburst hazard is topping.After determining topping; on ground, CBM Drilling is set; drilling well is got to topping position; extraction (also claiming the pre-extraction in ground) is carried out to the coal bed gas of topping; more preferably, the quantity of CBM Drilling is multiple, and multiple CBM Drilling formation spacing is the well pattern of 200 to 400 meters; comprehensive extraction can be carried out in conjunction with the extraction ability of CBM Drilling to the coal bed gas of topping like this, avoid occurring dead angle.Facts have proved, the coal bed gas extraction of the CBM Drilling team topping arranged by ground 5 to 10 years, the coal bed gas recovery ratio of topping generally reaches 30% ~ 50%.The rate of recovery of coal bed gas can be made so greatly to improve, decrease the waste of resource.
In preparation process; first confirm that whether topping coal bed gas content is up to standard; namely when topping coal bed gas content at below 8m3/t or coal bed gas pressure at 0.74MPa (gauge pressure) below; this is that the coal can regarding as topping possesses mining conditions, at this moment can exploit the coal of topping.While topping coal is exploited, this layer of position coal bed gas extraction is carried out to topping, namely at the top board of topping, hole pumping and mining is carried out in base plate and coal seam, concrete way can be, (distance seat earth is generally 20 ~ 30m to the large lane developing of down-hole topping (head adopts layer) base plate, avoid seat earth Mining failure band), rear ground drilling of having constructed adopts the anti-reflection technology of pressure break, topping coal bed gas is taken out in advance to layer-through drilling on down-hole base plate tunnel carries out, the mode of this aboveground lower associating is adopted to take out 1 ~ 5 year in advance, the coal bed gas recovery ratio of topping reaches 35% ~ 60%.It should be noted that, can carry out in topping opening driving process and in the progress of coal mining of topping the extraction of topping coal bed gas in preparation process.
Due to the adjacent layer that destination layer is topping; the safety coal extraction of topping coal is carried out after topping extraction is up to standard; and the topping work plane spatially exploited; in an inclined direction should protected seam work plane 1 ~ 2 section in advance; along with the extraction in topping coal seam; stope STRESS VARIATION; Roof Rock Strata of Coal Seam is moved, be out of shape, destroy; form caving zone, slit band and warp damage, utilize protective coat extracted release effect extraction topping and destination layer (adjacent layer) coal bed gas.
Particularly, carry out pre-extraction to destination layer coal bed gas to comprise: utilize high-order drill site and/or suction road and/or concordant boring and/or layer-through drilling and/or surface well to carry out coal bed gas extraction to destination layer.Namely the technology extraction topping coal bed gas such as the boring of high-order drill site, suction road, concordant, layer-through drilling, surface well are utilized at topping coal seam recovery phase; adopt that top board moves towards layer-through drilling, height (end) takes out the extraction such as lane, ground drilling destination layer coal bed gas, until topping safety coal extraction terminates simultaneously.It should be noted that, in production stage, can carry out in destination layer opening driving process and in the progress of coal mining of topping the extraction of destination layer coal bed gas.
When the coal of topping and coal bed gas are exploited; when the work plane of topping is pushed ahead; the protected layer of destination layer adopts unload effects; destination layer top board or base plate there will be crack, and gas permeability of coal seam increases, and coal bed gas is migrated to crack; taking out in advance and release extraction by the coal bed gas to destination layer; the extraction of destination layer coal bed gas is up to standard, and outburst hazard is eliminated, and then carries out the safe coal back production of destination layer.
In production stage, first confirm that whether destination layer coal bed gas content is up to standard, namely when destination layer coal bed gas content is at 8m
3at 0.74MPa (gauge pressure) below, this is that the coal can regarding as destination layer possesses mining conditions, at this moment can exploit the coal of destination layer for/below t or coal bed gas pressure.While destination layer coal is exploited, this layer of position coal bed gas extraction is carried out to destination layer, namely carry out hole pumping and mining in the top board of destination layer, base plate and coal seam.Concrete way carries out hole pumping and mining in the top board of topping, base plate and coal seam.
Further, in described preparation process, also comprise topping goaf extraction step, by the mode of the top plate drilling in topping goaf, pipe laying and ground drilling, extraction is carried out to the coal bed gas in topping goaf.Wherein top plate drilling, pipe laying and ground drilling etc. are the conventional means in undergraduate course field to the extraction way of coal bed gas, therefore no longer describe in detail herein.Adopt and can realize in this way carrying out ground to the coal bed gas in topping goaf and down-hole three-dimensional works in coordination with extraction.
Further, in described production stage, also comprise destination layer goaf extraction step, by the mode of the top plate drilling in topping goaf, pipe laying and/or ground drilling, extraction is carried out to the coal bed gas in destination layer goaf.If wherein destination layer directly can utilize the ground drilling of topping on topping, realize working in coordination with extraction to the ground of the coal bed gas in destination layer goaf and down-hole three-dimensional.
Topping goaf extraction step and destination layer goaf extraction step, can be understood as is implement for the goaf be divided into workspace in advance.
As a kind of embodiment, the quantity of described destination layer is at least one.In real work, after determining topping, can using upper and lower for topping two adjacent coal seams as destination layer.
Above embodiment makes the present invention have: can make rational planning for coal and cbm development, coal bed gas extraction and coal mining is made to accomplish orderly linking, thus achieve not with the integrated coordinated development of coal bed gas, simultaneously by the three-dimensional extraction of aboveground lower associating to coal bed gas, improve the advantage of the recovery ratio of coal bed gas.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (9)
1. the aboveground lower three-dimensional coal of topping release and a coal bed gas coordinated development method, is characterized in that:
Comprise: perspective long-term plan step, carry out coal and coal bed gas resource is reconnoitred, and by analyzing resource enrichness feature, determining topping, and CBM Drilling is set on ground, pre-extraction is carried out to the coal bed gas of topping;
Preparation process, after the extraction of topping coal bed gas is up to standard, exploitation topping coal, and this layer of position coal bed gas extraction is carried out to topping, pre-extraction is carried out to destination layer coal bed gas simultaneously;
Production stage, after the extraction of destination layer coal bed gas is up to standard, exploitation destination layer coal, carries out this layer of position coal bed gas extraction to destination layer simultaneously.
2. the aboveground lower three-dimensional coal of topping release according to claim 1 and coal bed gas coordinated development method, is characterized in that:
Described topping is without outburst danger or the little girdle of outburst hazard.
3. the aboveground lower three-dimensional coal of topping release according to claim 1 and coal bed gas coordinated development method, is characterized in that:
In described preparation process, this layer of position coal bed gas extraction is carried out to topping and comprises: carry out hole pumping and mining in the top board of topping, base plate and coal seam.
4. the aboveground lower three-dimensional coal of topping release according to claim 1 and coal bed gas coordinated development method, is characterized in that:
In described preparation process, pre-extraction is carried out to destination layer coal bed gas and comprises: utilize high-order drill site and/or suction road and/or concordant boring and/or layer-through drilling and/or surface well to carry out coal bed gas extraction to destination layer.
5. the aboveground lower three-dimensional coal of topping release according to claim 1 and coal bed gas coordinated development method, is characterized in that:
Also comprise extraction step in topping goaf in described preparation process, by the mode of the top plate drilling in topping goaf, pipe laying and ground drilling, extraction is carried out to the coal bed gas in topping goaf.
6. the aboveground lower three-dimensional coal of topping release according to claim 1 and coal bed gas coordinated development method, is characterized in that:
In described production stage, this layer of position coal bed gas is carried out to destination layer and comprises: carry out hole pumping and mining in the top board of topping, base plate and coal seam.
7. the aboveground lower three-dimensional coal of topping release according to claim 1 and coal bed gas coordinated development method, is characterized in that:
Also comprise extraction step in destination layer goaf in described production stage, by the mode of the top plate drilling in topping goaf, pipe laying and/or ground drilling, extraction is carried out to the coal bed gas in destination layer goaf.
8. the aboveground lower three-dimensional coal of the topping release according to claim 1 to 7 any one and coal bed gas coordinated development method, is characterized in that:
The quantity of described CBM Drilling is multiple, and it is the well pattern of 200 to 400 meters that multiple described CBM Drilling forms spacing.
9. the aboveground lower three-dimensional coal of topping release according to claim 8 and coal bed gas coordinated development method, is characterized in that:
The quantity of described destination layer is at least one.
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| CN105507903A (en) * | 2015-12-15 | 2016-04-20 | 中国矿业大学 | Coal-rock simultaneous production protecting seam and protected seam collaborative mining method |
| CN107905834A (en) * | 2017-12-20 | 2018-04-13 | 中原工学院 | A kind of hypotonic high prominent coal seam architecture gas production method |
| CN108301865A (en) * | 2018-03-02 | 2018-07-20 | 煤炭科学研究总院 | A kind of coal of the hypotonic weak seam group in deep coordinates production method with coal bed gas |
| CN110630328A (en) * | 2019-08-19 | 2019-12-31 | 天地科技股份有限公司 | Method and system for measuring protective range of mining protective layer |
| CN111042791A (en) * | 2019-12-29 | 2020-04-21 | 山西晋城无烟煤矿业集团有限责任公司 | Combined coal and coal bed gas co-production method for upper and lower wells of low-permeability coal bed group |
| CN113011635A (en) * | 2021-02-18 | 2021-06-22 | 重庆大学 | Coal and coalbed methane coupling coordination development device and method |
| CN113033954A (en) * | 2021-02-18 | 2021-06-25 | 重庆大学 | Intelligent decision-making method for coordinated development of coal and coalbed methane |
| CN114396244A (en) * | 2021-12-21 | 2022-04-26 | 重庆大学 | Deep coal seam group well up-down combined permeability-increasing gas extraction method |
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Cited By (11)
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| CN105507903A (en) * | 2015-12-15 | 2016-04-20 | 中国矿业大学 | Coal-rock simultaneous production protecting seam and protected seam collaborative mining method |
| CN105507903B (en) * | 2015-12-15 | 2018-01-02 | 中国矿业大学 | Adopt protective layer cooperates with recovery method to a kind of coal petrography with protected seam together |
| CN107905834A (en) * | 2017-12-20 | 2018-04-13 | 中原工学院 | A kind of hypotonic high prominent coal seam architecture gas production method |
| CN108301865A (en) * | 2018-03-02 | 2018-07-20 | 煤炭科学研究总院 | A kind of coal of the hypotonic weak seam group in deep coordinates production method with coal bed gas |
| CN110630328A (en) * | 2019-08-19 | 2019-12-31 | 天地科技股份有限公司 | Method and system for measuring protective range of mining protective layer |
| CN111042791A (en) * | 2019-12-29 | 2020-04-21 | 山西晋城无烟煤矿业集团有限责任公司 | Combined coal and coal bed gas co-production method for upper and lower wells of low-permeability coal bed group |
| CN111042791B (en) * | 2019-12-29 | 2021-08-27 | 山西晋城无烟煤矿业集团有限责任公司 | Combined coal and coal bed gas co-production method for upper and lower wells of low-permeability coal bed group |
| CN113011635A (en) * | 2021-02-18 | 2021-06-22 | 重庆大学 | Coal and coalbed methane coupling coordination development device and method |
| CN113033954A (en) * | 2021-02-18 | 2021-06-25 | 重庆大学 | Intelligent decision-making method for coordinated development of coal and coalbed methane |
| CN114396244A (en) * | 2021-12-21 | 2022-04-26 | 重庆大学 | Deep coal seam group well up-down combined permeability-increasing gas extraction method |
| CN114396244B (en) * | 2021-12-21 | 2023-10-31 | 重庆大学 | Method for extracting gas by up-and-down combined permeability-increasing of deep coal seam group well |
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Application publication date: 20160113 |