远距离下保护层底板穿层钻孔卸压瓦斯抽采研究  

Study on Gas Drainage by Pressure Relief for Floor Through Beds Holes in Far Distance Lower Protective Coal Seam

作　　者：刘军[1,2] 李生舟 姚明柱[3] LIU Jun;LI Shengzhou;YAO Mingzhu(National Key Laboratory of Gas Disaster Detecting, Preventing and Emergency Controlling, Chongqing 400037, China;China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, China;Hancheng Mining Co., Ltd., Hancheng 715400, China)

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司,重庆400037 [3]韩城矿业有限公司,陕西韩城715400

出　　处：《煤矿安全》2017年第12期127-130,134,共5页Safety in Coal Mines

摘　　要：以桑树坪煤矿远距离下保护层11~#煤层开采保护主采3#煤层为研究对象,利用底板巷布置上向穿层网格式钻孔抽采被保护层卸压瓦斯,研究得出将3314底板瓦斯抽放巷布置在3#煤层底部法距15 m处较为合理。实际抽采数据表明,在远距离下保护层开采期间,采动影响能够有效卸压,提高被保护层的透气性,底抽巷预抽区域瓦斯预抽率约为65.6%。从卸压瓦斯抽采效果分析,11#煤层回采后保护层工作面前方10 m至保护层工作面后方60 m范围内对应的上覆3#煤层区域为最佳卸压瓦斯抽采区域。This paper takes the remote lower protective layer 11~# coal seam mining to protect main 3~# coal seam as the research object in Songshuping Coal Mine.It is concluded that it is reasonable to arrange 3314 floor gas drainage roadway at the bottom 15 m of the 3~# coal seam through arranging through beds grid format upholes in floor roadway to extract the protective layer and carry out pressure relief gas.The actual extraction data show that during the mining of the long-distance protective layer,the influence of the mining can effectively relieve the pressure and improve the permeability of the protective layer.The pre-pumping rate of the drainage area is about 65.6%.According to the effect analysis of pressure relief gas extraction,11~# coal seam after the protection of the working layer in front of 10 m to the protective layer of the face of 60 m within the corresponding overlying 3~# coal seam is the best pressure relief gas extraction area.

关 键 词：远距离下保护层 保护范围 穿层钻孔 瓦斯抽采 透气性 活跃区 

分 类 号：TD713[矿业工程—矿井通风与安全]