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.
作者
刘军
李生舟
姚明柱
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)
出处
《煤矿安全》
北大核心
2017年第12期127-130,134,共5页
Safety in Coal Mines
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
long distance lower protection layer
protection range
through beds hole
gas extraction
permeability
active area
