CN1648412A - Ventilation system for high gas comprehensive production and caving down roof coal working surface - Google Patents
Ventilation system for high gas comprehensive production and caving down roof coal working surface Download PDFInfo
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- CN1648412A CN1648412A CN 200410002641 CN200410002641A CN1648412A CN 1648412 A CN1648412 A CN 1648412A CN 200410002641 CN200410002641 CN 200410002641 CN 200410002641 A CN200410002641 A CN 200410002641A CN 1648412 A CN1648412 A CN 1648412A
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Abstract
The ventilation system has intake air sublevel and return air sublevel laid along the coal bed base board, ventilation cross hole between the intake air sublevel and the return air sublevel, parallel working surface ventilation network, and roof gas exhausting network laid in parallel with the return air sublevel, to form one type-B 'one intake-two return-cross hole' ventilation system. There are adjusting ventilation doors inside the return air sublevel and near the ventilation cross hole and adjusting ventilation doors inside ventilation cross hole near the intake air sublevel. The present invention is one safe and efficient work surface ventilation system for comprehensively extraction of high gas easy-to-burn thick coal bed.
Description
Technical field: coal mining ventilation safety field.
Background technology: in the development course of coal mining technology, adopt by combining that to combine the development of putting be a field technology revolution, the continuous development of mining technology and perfect, enrich and expanded the content of coal-mining method more, make Coal Production and management be able to transform to high-efficiency intensifying and high-tech type from labor-intensive, for the effective operation of coal mining enterprise is laid a good foundation, but, the ambient conditions difference of Coal Production, especially gas, coal dust and spontaneous combustion disaster make longwall top coal caving be subjected to great restriction.Can the inflammable high seam of high gas realize the mining exploitation, and key is decided by the degree of reliability of various Its Preventive Measures.In the inflammable thick coal-layer mining of high gas, all kinds of face-airing such as U type, U+L type, Z type, double Z shaped, W type, Y type, H type system all because of self existing inevitable defective, fails to solve reliably gas, coal dust and spontaneous combustion disaster.Carry out the exploitation of higher slice liberation layer, and take gas drainage under suction, coal-bed flooding, goaf to annotate Its Preventive Measures such as nitrogen,, greatly restricted the development of high-efficiency intensifying though alleviated the safety problem of longwall top coal caving to a certain extent.
Summary of the invention: the objective of the invention is to propose the novel ventilated system of work plane in conjunction with the inflammable high seam mining of high gas exploitation characteristics, by adjusting the leeway between air return way resistance and air entering and returning crossheading, reaching the high gas fully mechanized coal face gas of inhibition gushes out, high top of guiding work plane and upper corner gas is by pre-routing migration, solves high gas gush out comprehensive coal face upper corner, high top and air return way gas exceeding limit problem.
The object of the present invention is achieved like this: a kind of high gas comprehensive extracting and caving face ventilation system, be furnished with coal-face air intake crossheading 1 and air return way 2 along seat earth 11, air intake crossheading 1 links to each other with the big lane 9 of return air with the big lane 8 of exploiting field air intake respectively with air return way 2; Beyond work plane stops adopting line 12, be furnished with air connection 3, be communicated with air intake crossheading 1 and air return way 2, constitute ventilation network in parallel with work plane 4; Arrange a drawing-off gas lane 5 with air return way 2 parallel and interior wrong air return way 10m～20m along roof 13, form the Type B ventilation system of " enters two go back tos one lanes ".
Establish an air damper 6 by air connection 3 one ends on the air return way 2, on air connection 3, establish an air damper 7 by air intake crossheading 1 one ends.
The present invention has following beneficial effect:
1. comprehensive coal face is used the Type B ventilation system and can be reduced the gas total amount of gushing out, and pass through each air damper and control the gas discharge rate of distributing return airway and drawing-off gas lane, utilize the drawing-off gas lane to allow the high condition of gas density, reduce the work plane wind supply quantity, reduce wind speed, reduce coal dust and fly upward the optimization production environment.
2.B type ventilation operation face is mainly based on parallel network, and the reduction of work plane wind supply quantity, can reduce work plane two ends leeway, changes goaf " three bands " and distributes, and dwindles goaf oxidized zone width, reduces goaf spontaneous combustion harm.
3.B type ventilation operation face zone can reduce work plane zone and mine resistance significantly based on parallel network, improves regional wind supply quantity, strengthens the mine ventilation ability.
4, the Type B ventilation system of the present invention's proposition is that the high gas layer comprehensive extracting and caving face accomplishes that " one through three prevention " promptly ventilates, prevents and treats gas, the effective means of the comprehensive safety management of preventing dust, prevent fires, the reasonable science of this system, compliance is strong, has promotional value widely.
Description of drawings:
Fig. 1 is a system schematic of the present invention
Fig. 2 is the I-I sectional view of Fig. 1
The specific implementation process:
1. the high gas comprehensive extracting and caving face of Type B ventilation system, break in the management of face-airing in the past to guaranteeing ventilation safety, avoid as far as possible or stop to advance, arrange connection roadway between air return way at work plane, in case the conventional way of leak-stopping wind or distinguished and admirable short circuit, coal-face air intake crossheading 1 and air return way 2 are arranged along the floor, coal seam, linked to each other with the big lane 9 of return air with the big lane 8 of exploiting field air intake respectively; Arrange that beyond work plane stops adopting line 12 air connection 3 is communicated with air intake crossheading 1 and air return way 2, constitute ventilation network in parallel with work plane 4; Parallel with air return way 2, and interior wrong air return way 10m～20m, be arranged in parallel drawing-off gas lane 5 along roof 13, form the Type B ventilation system of " enters two go back tos one lanes "; On its air return way 2,, on its air connection 3, install air damper 7 by air intake crossheading 1 one ends by air connection 3 one ends installing air damper 6.By operation air damper 6 and 7, adjust the leeway between air return way resistance and air entering and returning crossheading, reaching the high gas fully mechanized coal face gas of inhibition gushes out, high top of guiding work plane and upper corner gas is by pre-routing migration, solves high gas gush out comprehensive coal face upper corner, high top and air return way gas exceeding limit problem.
Gush out under the prerequisite of total amount reducing face gas, control distributes the gas discharge rate of return airway and exhaust stack, utilizes the drawing-off gas lane to allow the high condition of gas density, reduces the work plane wind supply quantity, reduction wind speed, optimization production environment; The work plane wind supply quantity reduces, and reduces work plane two ends pressure reduction, dwindles goaf oxidized zone width, eliminates goaf spontaneous combustion harm; The work plane zone reduces work plane zone and mine resistance significantly based on parallel network, improves regional wind supply quantity, strengthens the mine ventilation ability.Calculate and practice by theory, determine the novel ventilated system of high gas fully mechanized coal face (Type B) parameter (air quantity, wind speed, each point gas density, goaf three bands etc.) of reasonably ventilating.Utilize the mine safety comprehensive monitoring system, the face-airing parameter is monitored in real time, guarantee that ventilation system is reliable and stable.
2. suppressing gas gushes out.The comprehensive coal face gas source that gushes out is divided into and adopts the coal breakage charcoal and new expose that rib gas is gushed out, tunnel gas is gushed out, goaf gas is gushed out three parts, at each source different characteristics of gushing out of gas, suppress gas by distinct methods and gush out, the face gas total amount of gushing out is reduced.
(1) adopts the coal breakage charcoal and new to expose the rib gas intensity of gushing out relevant with several factors, but be inversely proportional to the distinguished and admirable absolute static pressure of work plane, be that the big more then gas of the absolute static pressure intensity of gushing out is more little, work plane is used the Type B ventilation system, increase local resistance by operation air damper 6, thereby the absolute static pressure of work plane is raise, suppress work plane effectively and adopt gushing out of coal breakage charcoal and new exposure rib gas, reduce gas emission.
(2) the gas intensity of gushing out in tunnel also is inversely proportional to distinguished and admirable absolute static pressure, therefore, increases local resistances by operation air damper 6, can effectively suppress the air intake crossheading equally and air return way gas is gushed out, and reduces gas emission.
(3) the goaf gas intensity of gushing out depends primarily on the goaf leakage intensity, and goaf inleakage greatly then gas emission is also big.Type B ventilation system work plane is mainly based on parallel network, the work plane wind supply quantity reduces about 1/4, reduce work plane two ends leeway by operation air damper 7, can shorten the goaf band scope of leaking out, the bandwidth of leaking out is by force foreshortened to about 8m, a little less than the band that leaks out be condensed to apart from work plane 8～40m, beyond work plane 40m, the formation band that suffocates dwindles the bandwidth of leaking out, and reaches to reduce the goaf gas outburst amount.
3. control gas migration.Under comprehensive coal face Type B ventilation system, increase local resistance by operation air damper 6, regulate the leeway between air return way 2 and the drawing-off gas lane 5, make drawing-off gas lane negative pressure a little less than the air return way negative pressure, control goaf high concentration gas is discharged from top board drawing-off gas lane, eliminates the high top of comprehensive coal face, upper corner and the methane accumulation of support afterbody.
4. calculate and practice by theoretical, determine the novel ventilated system of work plane (Type B) parameter (air quantity, wind speed, each point gas density, goaf three bands etc.) of reasonably ventilating.
5. give full play to modernized mine safety comprehensive monitoring system (centralized monitoring system and beam tube monitoring system) equipment usefulness, the face-airing parameter is monitored in real time, guarantee that ventilation system is reliable and stable.
Claims (2)
1, a kind of high gas comprehensive extracting and caving face ventilation system, it is characterized in that being furnished with coal-face air intake crossheading (1) and air return way (2) along seat earth (11), air intake crossheading (1) links to each other with the big lane of return air (9) with the big lane of exploiting field air intake (8) respectively with air return way (2); Stop adopting line (12) at work plane and be furnished with air connection (3) in addition, be communicated with air intake crossheading (1) and air return way (2), constitute ventilation network in parallel with work plane (4); Parallel with air return way and interior wrong air return way (2) 10m～20m arranges a drawing-off gas lane (5) along roof (13), forms the Type B ventilation system of " enters two go back tos one lanes ".
2, a kind of high gas comprehensive extracting and caving face ventilation system as claimed in claim 1, it is characterized in that air return way (2) upward leans on air connection (3) one ends to establish an air damper (6), goes up by air intake crossheading (1) one end at air connection (3) and establishes an air damper (7).
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| CN 200410002641 CN1648412A (en) | 2004-01-19 | 2004-01-19 | Ventilation system for high gas comprehensive production and caving down roof coal working surface |
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| CN 200410002641 CN1648412A (en) | 2004-01-19 | 2004-01-19 | Ventilation system for high gas comprehensive production and caving down roof coal working surface |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718208B (en) * | 2009-12-17 | 2011-02-23 | 山西晋城无烟煤矿业集团有限责任公司 | Ventilating system arranged in U+H shape under coal mine |
| CN102410040A (en) * | 2011-12-06 | 2012-04-11 | 中国神华能源股份有限公司 | Gas control method for return airflow corner of coalmine coal working face |
| CN102562088A (en) * | 2012-02-15 | 2012-07-11 | 山西汾西矿业（集团）有限责任公司 | Method for preventing gas from being accumulated at corners on coal faces |
| CN101498225B (en) * | 2009-02-24 | 2012-08-22 | 太原理工大学 | U+I type ventilating system for top-coal caving face |
| CN102704935A (en) * | 2012-05-31 | 2012-10-03 | 库尔勒金川矿业有限公司 | Extra-long working surface fully mechanized coal mining process |
| CN102720518A (en) * | 2012-06-18 | 2012-10-10 | 太原理工大学 | Double-U ventilation system for fully-mechanized caving coal working face |
| CN102889092A (en) * | 2012-10-29 | 2013-01-23 | 中钢集团马鞍山矿山研究院有限公司 | Multi-stage station ventilation technical system of mine |
| CN102900452A (en) * | 2012-10-29 | 2013-01-30 | 中钢集团马鞍山矿山研究院有限公司 | Technique for cooling deep mining area by using ground temperature of shallow goaf and waste roadway |
| CN103216253A (en) * | 2013-04-28 | 2013-07-24 | 山西智德安全工程技术有限公司 | Ventilating system for managing overrunning of corner gas on recovery working face |
| CN103541755A (en) * | 2012-07-12 | 2014-01-29 | 山西寿阳段王煤业集团有限公司 | W-shaped ventilation method for fully-mechanized top coal caving working face |
| CN105937405A (en) * | 2016-05-05 | 2016-09-14 | 煤科集团沈阳研究院有限公司 | U-shaped ventilation working face goaf full-face curtain nitrogen injection fire preventing and extinguishing method |
| CN109083674A (en) * | 2018-10-30 | 2018-12-25 | 中国矿业大学(北京) | A kind of safety clean ventilating system suitable for cutting top 110 engineering method of release exploitation working face |
-
2004
- 2004-01-19 CN CN 200410002641 patent/CN1648412A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498225B (en) * | 2009-02-24 | 2012-08-22 | 太原理工大学 | U+I type ventilating system for top-coal caving face |
| CN101718208B (en) * | 2009-12-17 | 2011-02-23 | 山西晋城无烟煤矿业集团有限责任公司 | Ventilating system arranged in U+H shape under coal mine |
| CN102410040A (en) * | 2011-12-06 | 2012-04-11 | 中国神华能源股份有限公司 | Gas control method for return airflow corner of coalmine coal working face |
| CN102562088A (en) * | 2012-02-15 | 2012-07-11 | 山西汾西矿业（集团）有限责任公司 | Method for preventing gas from being accumulated at corners on coal faces |
| CN102704935A (en) * | 2012-05-31 | 2012-10-03 | 库尔勒金川矿业有限公司 | Extra-long working surface fully mechanized coal mining process |
| CN102720518A (en) * | 2012-06-18 | 2012-10-10 | 太原理工大学 | Double-U ventilation system for fully-mechanized caving coal working face |
| CN102720518B (en) * | 2012-06-18 | 2014-09-24 | 太原理工大学 | Double-U ventilation system for fully-mechanized caving coal working face |
| CN103541755A (en) * | 2012-07-12 | 2014-01-29 | 山西寿阳段王煤业集团有限公司 | W-shaped ventilation method for fully-mechanized top coal caving working face |
| CN102900452A (en) * | 2012-10-29 | 2013-01-30 | 中钢集团马鞍山矿山研究院有限公司 | Technique for cooling deep mining area by using ground temperature of shallow goaf and waste roadway |
| CN102889092A (en) * | 2012-10-29 | 2013-01-23 | 中钢集团马鞍山矿山研究院有限公司 | Multi-stage station ventilation technical system of mine |
| CN102889092B (en) * | 2012-10-29 | 2014-10-01 | 中钢集团马鞍山矿山研究院有限公司 | Multi-stage station ventilation technical system of mine |
| CN102900452B (en) * | 2012-10-29 | 2014-12-17 | 中钢集团马鞍山矿山研究院有限公司 | Technique for cooling deep mining area by using ground temperature of shallow goaf and waste roadway |
| CN103216253A (en) * | 2013-04-28 | 2013-07-24 | 山西智德安全工程技术有限公司 | Ventilating system for managing overrunning of corner gas on recovery working face |
| CN105937405A (en) * | 2016-05-05 | 2016-09-14 | 煤科集团沈阳研究院有限公司 | U-shaped ventilation working face goaf full-face curtain nitrogen injection fire preventing and extinguishing method |
| CN109083674A (en) * | 2018-10-30 | 2018-12-25 | 中国矿业大学(北京) | A kind of safety clean ventilating system suitable for cutting top 110 engineering method of release exploitation working face |
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