针对平煤十矿己-工作面瓦斯涌出量大、治理难度高的问题,采用本煤层预抽、采空区抽采及强化增透等多种方式相结合的综合瓦斯抽采技术最大限度地增加瓦斯抽采量.结果表明,实施综合瓦斯抽采技术后,工作面煤层瓦斯含量从.37 m3/t 降到.83 m3/t,瓦斯抽采率达.82%,回采期间回风流瓦斯浓度为.6%,保证了工作面的安全开采.
Aiming at the problem of large gas emission which is hard to control in F15G24080 working face in No.10 Mine,the comprehensive gas drainage technology including the coal seam preGdrainage,gob drainage,enhancing the coal seam permeability and other ways is adopted to maximize the gas extraction.The results show that,the implementation of comprehensive gas drainage technology,makes the gas content decrease from 12.37m3/t to 5.83m3/t in working face coal seam and the extraction rate reach 67.82%,and returnGair gas concentration is 0.6% during the recovery period,which ensure the safe mining in working face.