CN102116169A - Drainage method for pressure-relief gas baseboard stonehead of protected seam - Google Patents
Drainage method for pressure-relief gas baseboard stonehead of protected seam Download PDFInfo
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- CN102116169A CN102116169A CN2011100295292A CN201110029529A CN102116169A CN 102116169 A CN102116169 A CN 102116169A CN 2011100295292 A CN2011100295292 A CN 2011100295292A CN 201110029529 A CN201110029529 A CN 201110029529A CN 102116169 A CN102116169 A CN 102116169A
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Abstract
The invention discloses a drainage method for a pressure-relief gas baseboard stonehead of a protected seam. A baseboard stonehead is constructed on a baseboard of a coal seam; moreover, a plurality of groups of transformational drill holes are constructed to the coal seam in the baseboard stonehead; during the construction period of each group of transformational drill holes, the completed drill holes are temporarily sealed; after all the drilled holes are completely constructed, the drilled holes are unsealed to lead the protected seam to be communicated with the baseboard stonehead; then the inlet of the baseboard stonehead is sealed and the gas of the baseboard stonehead is discharged; while discharging the gas, the coal seam on the lower part of the baseboard stonehead or the upper part of the protected seam is mined; with the propulsion of a mined working surface, pressure relief and anti-reflection effects are generated on the protected seam; and under the action of negative drainage pressure, a great amount of pressure-relief gas enters the baseboard stonehead through the transformational drill holes, and is pumped out by a drainage pipeline. The method can prevent poor drainage effects caused by water logging in the drilled holes and gas leakage in the drilled holes in the mining process of the protected seam, is beneficial to draining pressure-relief gas, and has good effect.
Description
Technical field
The present invention relates to the gas pumping technology, especially a kind of pressure relief gas pumping mining method that is applicable to protected seam (coal seam).
Background technology
The topping production technique is a kind of main regional outburst prevention measures, wherein relates to two coal seams of topping and protected seam.For the outburst danger of eliminating contiguous coal seam (protected seam) is called topping in the coal seam of exploitation earlier; Because pumping and mining pressure relief mash gas is simultaneously used also in the action of adopting of topping exploitation, can make contiguous outburst danger coal seam change no outburst danger coal seam into, this outburst danger coal seam is called protected seam.After the topping exploitation, protected seam has obtained the release antireflective effect, eliminates outburst hazard for making protected seam, must carry out extraction to the gas pressure relief of protected seam.At present protected seam being carried out the modal measure of pressure relief gas pumping mining is to the layer-through drilling pumping method on the floor roadway grid type, this mode need be moved towards a construction floor rock tunnel (floor roadway) in the base plate of protected seam, from floor roadway to protected seam construction gridding type layer-through drilling, and layer-through drilling carried out permanent sealing of hole, floor roadway does not need sealing, by hole sealing tube boring is connected in total extraction pipeline of laying in the floor roadway and carries out gas pumping, but after the topping exploitation, movement and deformation along with the rock stratum, the interlayer rock stratum can produce new crack, the sealing of hole effect of layer-through drilling has been destroyed in the crack, cause boring gas leakage, the extraction effect descends, and gas enters floor roadway along the crack can also cause that gas density transfinites in the floor roadway, brings potential safety hazard; And under the moisture situation of coal rock layer, water enters the extraction pipeline along sealing of hole, easy ponding in the extraction pipeline, and blocking pipeline influences the gas pumping effect of protected seam.
Summary of the invention
Technical problem: the objective of the invention is to overcome in the prior art and have problems, provide a kind of method simple, avoid that the rock stratum produces that gas density transfinites in crack, the floor roadway, protected seam gas pressure relief floor roadway pumping method safely and efficiently.
Technical scheme: the extraction method of protected seam gas pressure relief of the present invention comprises the steps:
A. floor roadway that is positioned at work plane geometric center position along the work plane trend of construction on the layer position of the protected seam work plane about 20m in bottom at first;
B. in the floor roadway to the many groups of protected seam work plane grouping construction layer-through drillings, every group of layer-through drilling is 3～6, its section is fan-shaped, protected seam is passed in the radiation in the floor roadway of every group of layer-through drilling respectively;
C. after every group of layer-through drilling construction finishes, it is carried out interim sealing of hole;
D. after the layer-through drilling for the treatment of whole protected seam work plane was all constructed and finished, unpacking boring made protected seam be communicated with floor roadway, the airtight tunnel of fire dam of constructing in the entrance of floor roadway, and installation extraction pipeline carries out extraction;
E. begin the coal seam on floor roadway bottom or protected seam top is exploited; along with the propelling of exploitation work plane, protected seam produces the release antireflective effect, under the extraction suction function; the layer boring that wears long of a large amount of gas pressure reliefs enters floor roadway, is drawn out of by the extraction pipeline.
Spacing between described many group layer-through drillings is 30m; The negative pressure of carrying out extraction is 10～20 KPa.
Beneficial effect: owing to adopted technique scheme; during drilling construction, seal temporarily; unpacking boring during mash gas extraction; arrival end to floor roadway carries out permanent closure; utilize the tunnel negative pressure that boring gas is carried out extraction; extraction borehole adopts naked hole mode, utilizes the tunnel negative pressure that gas pumping is carried out in boring, can avoid because the situation of boring ponding and the extraction weak effect that boring gas leakage causes in the topping recovery process takes place.Guarantee that each drilling orifice negative pressure is suitable, help the extraction of gas pressure relief, on-the-spot engineering application table obvious results fruit is good.According to investigation, in effective extraction phase, the gas pumping scale is about 10 m
3/ min, extraction concentration realizes the efficient extraction of protected seam gas pressure relief more than 50%.
Description of drawings
Fig. 1 is a protected seam gas pressure relief floor roadway pumping method schematic diagram of the present invention;
Fig. 2 is this one group of layer-through drilling cross section pumping method schematic diagram.
Among the figure: 1-protected seam; 2-layer-through drilling; 3-extraction pipeline; 4-fire dam; 5-floor roadway.
The specific embodiment
As shown in Figure 1; the extraction method of protected seam gas pressure relief of the present invention; floor roadway 5 of construction on the layer position of the about 20m in protected seam 1 work plane bottom at first along protected seam 1 work plane trend; the position, tunnel is in the work plane tendency geometric center position of protected seam 1; after floor roadway 5 constructions are finished; in floor roadway 5, organize layer-through drillings 2 to protected seam 1 work plane grouping construction more; spacing between many group layer-through drillings 2 is 30m, determines the group number according to the length of floor roadway 5 corresponding protected seam 1 work planes.Every group of layer-through drilling is 3～6, and its section is fan-shaped, and protected seam 1 is passed in the radiation in the floor roadway 5 of every group of layer-through drilling respectively, forms nettedly on protected seam 1, and as shown in Figure 2, layer-through drilling is 5 among Fig. 2; After 2 constructions of every group of layer-through drilling finish, it is carried out interim sealing of hole, interim sealing material adopts soft materials such as cotton-wool; To prevent that the gas in the layer-through drilling 2 from pouring in floor roadway, causes floor roadway concentration to transfinite; After treating layer-through drilling 2 whole construction end of whole protected seam work plane; unpacking boring; protected seam 1 directly is communicated with floor roadway 5; in the entrance of floor roadway 5 construction fire dam 4 airtight tunnels; and extraction pipeline 3 is installed is carried out extraction; the extraction negative pressure is 10～20 KPa, regulates according to actual needs.Afterwards; begin the coal seam (topping) on floor roadway 5 bottoms or protected seam 1 top is exploited; propelling along with the seam mining work plane; make protected seam 1 loosening; produce the release antireflective effect; under the extraction suction function, the layer boring 2 that wears long of a large amount of gas pressure reliefs enters floor roadway 5, is drawn out of by extraction pipeline 3.
Claims (3)
1. the extraction method of a protected seam gas pressure relief is characterized in that comprising the steps:
A. at first go up floor roadway (5) that is positioned at work plane geometric center position along the work plane trend of construction in the layer position of protected seam (1) the about 20m in work plane bottom;
B. organize layer-through drillings (2) to protected seam (1) work plane grouping construction in floor roadway (5), every group of layer-through drilling is 3～6 more, and its section is fan-shaped, and every group of layer-through drilling passes protected seam (1) respectively from the interior radiation of floor roadway (5);
C. after every group of layer-through drilling (2) construction finishes, it is carried out interim sealing of hole;
D. after treating the whole construction end of layer-through drilling (2) of whole protected seam (1) work plane, unpacking boring, protected seam (1) is communicated with floor roadway (5),, and extraction pipeline (3) is installed is carried out extraction in the airtight tunnel of construction fire dam (4), the entrance of floor roadway (5);
E. begin the coal seam on floor roadway (5) bottom or protected seam (1) top is exploited; propelling along with the exploitation work plane; protected seam (1) produces the release antireflective effect; under the extraction suction function; the layer boring (2) that wears long of a large amount of gas pressure reliefs enters floor roadway (5), is drawn out of by extraction pipeline (3).
2. the extraction method of protected seam gas pressure relief according to claim 1 is characterized in that: the spacing between described many group layer-through drillings (2) is 30m.
3. the extraction method of protected seam gas pressure relief according to claim 1 is characterized in that: the negative pressure of carrying out extraction is 10～20 KPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100295292A CN102116169A (en) | 2011-01-27 | 2011-01-27 | Drainage method for pressure-relief gas baseboard stonehead of protected seam |
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| CN2011100295292A CN102116169A (en) | 2011-01-27 | 2011-01-27 | Drainage method for pressure-relief gas baseboard stonehead of protected seam |
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| CN102748064A (en) * | 2012-07-19 | 2012-10-24 | 大同煤矿集团有限责任公司 | Large-mining-height fully-mechanized caving face gas control method |
| CN103046946A (en) * | 2011-10-14 | 2013-04-17 | 中国矿业大学(北京) | Low permeability coal seam gas pre-drainage method though intensive drilling holes and pipe pressure-up |
| CN103362541A (en) * | 2013-08-07 | 2013-10-23 | 中国矿业大学 | Method for locally improving coal seam air permeability in coal seam with high gas and low air permeability |
| CN103615248A (en) * | 2013-11-23 | 2014-03-05 | 西南科技大学 | Top and bottom plate treatment mining technology for hydrogen sulfide-containing coal bed |
| CN103696801A (en) * | 2013-12-20 | 2014-04-02 | 安徽理工大学 | Method for testing surface borehole pressure relief gas drainage range |
| CN103758560A (en) * | 2014-01-14 | 2014-04-30 | 中国矿业大学 | Method for gas treatment in multiple progressive protection seam grouping regions |
| CN103899348A (en) * | 2014-04-23 | 2014-07-02 | 重庆市能源投资集团科技有限责任公司 | Method for fast extracting gas on coalface |
| CN104018874A (en) * | 2014-06-13 | 2014-09-03 | 中煤科工集团重庆研究院有限公司 | Method for bedding drilling and working surface gas pre-extraction |
| CN105804788A (en) * | 2016-05-16 | 2016-07-27 | 中国矿业大学 | Method for managing coalbed gas roadway |
| CN106150541A (en) * | 2016-07-05 | 2016-11-23 | 安徽理工大学 | A kind of base plate directional drilling group and neighbouring lower protected seam gas pumping method |
| CN106368729A (en) * | 2016-11-04 | 2017-02-01 | 大同煤矿集团有限责任公司 | Advanced mining pressure relief zone gas pre-extraction prevention and control method |
| CN106930733A (en) * | 2017-05-10 | 2017-07-07 | 中国神华能源股份有限公司 | Coal bed gas group wells extraction system and method for construction |
| CN107152261A (en) * | 2017-05-10 | 2017-09-12 | 中国神华能源股份有限公司 | Coal bed gas extraction system and method for construction |
| CN109441526A (en) * | 2019-01-11 | 2019-03-08 | 淮南矿业(集团)有限责任公司 | A kind of protected seam gas pumping method |
| CN112922561A (en) * | 2021-03-03 | 2021-06-08 | 河南理工大学 | Gas extraction drilling hole sealing method for underground bottom suction roadway of coal mine |
| CN113236348A (en) * | 2021-06-30 | 2021-08-10 | 平顶山市安泰华矿用安全设备制造有限公司 | Coal seam slit gas treatment outburst prevention process |
| CN115163026A (en) * | 2022-06-30 | 2022-10-11 | 河南理工大学 | Method for arranging through-layer drill holes of protective layer under remote coal seam |
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| CN103046946B (en) * | 2011-10-14 | 2015-03-04 | 中国矿业大学(北京) | Low permeability coal seam gas pre-drainage method though intensive drilling holes and pipe pressure-up |
| CN103046946A (en) * | 2011-10-14 | 2013-04-17 | 中国矿业大学(北京) | Low permeability coal seam gas pre-drainage method though intensive drilling holes and pipe pressure-up |
| CN102748064A (en) * | 2012-07-19 | 2012-10-24 | 大同煤矿集团有限责任公司 | Large-mining-height fully-mechanized caving face gas control method |
| CN103362541A (en) * | 2013-08-07 | 2013-10-23 | 中国矿业大学 | Method for locally improving coal seam air permeability in coal seam with high gas and low air permeability |
| CN103362541B (en) * | 2013-08-07 | 2015-11-04 | 中国矿业大学 | High gassy and low permeability coal seam regionality increases the method for gas permeability of coal seam |
| CN103615248A (en) * | 2013-11-23 | 2014-03-05 | 西南科技大学 | Top and bottom plate treatment mining technology for hydrogen sulfide-containing coal bed |
| CN103615248B (en) * | 2013-11-23 | 2016-03-09 | 西南科技大学 | The roof and floor in sulfide hydrogen coal seam administers production practice |
| CN103696801A (en) * | 2013-12-20 | 2014-04-02 | 安徽理工大学 | Method for testing surface borehole pressure relief gas drainage range |
| CN103758560B (en) * | 2014-01-14 | 2015-11-18 | 中国矿业大学 | A kind of multiple topping packet zone mash gas harnessing method that goes forward one by one |
| CN103758560A (en) * | 2014-01-14 | 2014-04-30 | 中国矿业大学 | Method for gas treatment in multiple progressive protection seam grouping regions |
| CN103899348A (en) * | 2014-04-23 | 2014-07-02 | 重庆市能源投资集团科技有限责任公司 | Method for fast extracting gas on coalface |
| CN104018874B (en) * | 2014-06-13 | 2016-06-08 | 中煤科工集团重庆研究院有限公司 | A kind of concordant method of taking out in advance face gas of holing |
| CN104018874A (en) * | 2014-06-13 | 2014-09-03 | 中煤科工集团重庆研究院有限公司 | Method for bedding drilling and working surface gas pre-extraction |
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| CN106150541B (en) * | 2016-07-05 | 2019-06-18 | 安徽理工大学 | A kind of bottom plate directional drilling group and neighbouring lower protected seam gas pumping method |
| CN106150541A (en) * | 2016-07-05 | 2016-11-23 | 安徽理工大学 | A kind of base plate directional drilling group and neighbouring lower protected seam gas pumping method |
| CN106368729A (en) * | 2016-11-04 | 2017-02-01 | 大同煤矿集团有限责任公司 | Advanced mining pressure relief zone gas pre-extraction prevention and control method |
| CN107152261A (en) * | 2017-05-10 | 2017-09-12 | 中国神华能源股份有限公司 | Coal bed gas extraction system and method for construction |
| CN106930733A (en) * | 2017-05-10 | 2017-07-07 | 中国神华能源股份有限公司 | Coal bed gas group wells extraction system and method for construction |
| CN109441526A (en) * | 2019-01-11 | 2019-03-08 | 淮南矿业(集团)有限责任公司 | A kind of protected seam gas pumping method |
| CN112922561A (en) * | 2021-03-03 | 2021-06-08 | 河南理工大学 | Gas extraction drilling hole sealing method for underground bottom suction roadway of coal mine |
| CN113236348A (en) * | 2021-06-30 | 2021-08-10 | 平顶山市安泰华矿用安全设备制造有限公司 | Coal seam slit gas treatment outburst prevention process |
| CN115163026A (en) * | 2022-06-30 | 2022-10-11 | 河南理工大学 | Method for arranging through-layer drill holes of protective layer under remote coal seam |
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Application publication date: 20110706 |