摘要
为解决端氏煤矿集中回风巷独头掘进快速消突问题,借助近距离煤岩独巷同向递进的开拓条件,采用顺层孔和穿层孔立体交叉抽采技术全面控制防突区域。抽采期间为防治轨道大巷炮掘扰动破坏钻孔,顺层孔采用全孔段下放筛管以及穿层孔采用"破孔、透孔、分段封孔"三步走二次封孔的防突保障技术,实现防突钻孔高效、持久抽采。经过区域预抽35~40 d后,集中回风巷正前方和两侧15 m范围内煤体的残余瓦斯含量均小于8 m^3/t,满足区域防突效果检验要求,实现独头煤巷快速消突,保障"抽、掘"平衡。
In order to solve problem of rapid outburst elimination for concentrated return air roadway at heading face of DuanshiMine. Based on the exploitation conditions of coal and rock roadways going forward one by one with closed distance, we use gradeseparation drainage technology with bedding holes and through beds holes to overall control outburst prevention area. To preventblasting driving disturbance to damage holes in haulage roadway during gas extraction period, we use the outburst prevention andpretection technology of putting screen pipe down along the full length of bedding hole and using three-step and twice hole-sealing measure of ＂breaking hole, drilling hole, sectional hole sealing＂ in through beds hole to achieve efficient and long-timeextraction of outburst prevention hole. After regional pre-drainage of 35 days to 40 days, the residual gas content of cnal locatedin foreside and two sides of 15 m about concentrated return air roadway is all less than 8 m3/t, which satisfies the needs ofoutburst prevention effect, realizes rapid outburst elimination at heading face and ensures extraction and driving balance.
出处
《煤矿安全》
北大核心
2017年第4期71-74,78,共5页
Safety in Coal Mines
基金
"十三五"国家大型油气田及煤层气开发科技重大专项资助项目(2016ZX05045-004-001)
关键词
近距离煤岩独巷
同向递进
立体交叉抽采技术
炮掘扰动
残余瓦斯含量
close distance coal and rock roadway
going forward one by one
grade separation drainage technology
disturbing ofblasting driving
residual gas content
