矿业安全与环保
礦業安全與環保
광업안전여배보
MINING SAFETY & ENVIRONMENTAL PROTECTION
2015年
3期
86-89
,共4页
单一低透煤层%煤与瓦斯突出%底抽巷%煤气共采%水力冲孔
單一低透煤層%煤與瓦斯突齣%底抽巷%煤氣共採%水力遲孔
단일저투매층%매여와사돌출%저추항%매기공채%수력충공
single low-permeability coal seam%coal and gas outburst%floor drainage roadway%coal-gas co-extraction%hydraulic flushing in hole
针对单一低透突出煤层存在瓦斯灾害严重、开采效率低等问题，在分析回采工作面应力分布和渗透率分布的基础上，提出了单一低透突出煤层底抽巷煤气共采模式，即采前未卸压区水力冲孔抽采、采中影响区的应力降低区瓦斯抽采和采后的采空区瓦斯抽采模式。李沟煤矿的工程应用结果表明：3种抽采方法互相协调、互为补充，不但消除了工作面突出危险性，而且大大地增加了瓦斯抽采量，实现了单一低透突出煤层煤与瓦斯的安全高效开采。
針對單一低透突齣煤層存在瓦斯災害嚴重、開採效率低等問題，在分析迴採工作麵應力分佈和滲透率分佈的基礎上，提齣瞭單一低透突齣煤層底抽巷煤氣共採模式，即採前未卸壓區水力遲孔抽採、採中影響區的應力降低區瓦斯抽採和採後的採空區瓦斯抽採模式。李溝煤礦的工程應用結果錶明：3種抽採方法互相協調、互為補充，不但消除瞭工作麵突齣危險性，而且大大地增加瞭瓦斯抽採量，實現瞭單一低透突齣煤層煤與瓦斯的安全高效開採。
침대단일저투돌출매층존재와사재해엄중、개채효솔저등문제，재분석회채공작면응력분포화삼투솔분포적기출상，제출료단일저투돌출매층저추항매기공채모식，즉채전미사압구수력충공추채、채중영향구적응력강저구와사추채화채후적채공구와사추채모식。리구매광적공정응용결과표명：3충추채방법호상협조、호위보충，불단소제료공작면돌출위험성，이차대대지증가료와사추채량，실현료단일저투돌출매층매여와사적안전고효개채。
To counter to the serious gas troubles and low mining efficiency present in a single low-permeability outburst coal seam, based on the analysis of the distribution of stress and permeability in the working face, a coal-gas co-extraction technology by floor drainage roadway in a single low-permeability outburst seam was proposed, that is: gas extraction by hydraulic flushing in hole in the original pressure area before mining, gas extraction in the stress reduced area during mining and the gas extraction from gob after mining. The application in Ligou Mine showed that three gas extraction methods can be coordinated and complemented each other, the outburst hazard in the working face was not only eliminated, but also the gas extraction volume increased, as a result, the safe and efficient mining of the single low-permeability outburst seam was realized.
