近距离倾斜煤层群连续抽采快速揭煤技术  

Rapid Coal Uncovering Technology of Continuous Drainage in Near Distance Inclined Coal Seam Group

作　　者：龙声德 段勇信 罗飞 LONG Shengde;DUAN Yongxin;LUO Fei(Guizhou Songhe Coal Industry Development Co.,Ltd.,Liupanshui 553000,China)

机构地区：[1]贵州松河煤业发展有限责任公司,贵州六盘水553000

出　　处：《矿业工程研究》2022年第4期30-34,共5页Mineral Engineering Research

摘　　要：为解决贵州松河煤业发展有限责任公司近距离倾斜煤层群石门揭煤周期长、频次高的问题,提出近距离倾斜煤层群连续抽采快速揭煤技术:采用穿层长钻孔连续抽采前方待揭煤层揭煤区域瓦斯,同时在待揭煤层7 m法向距前对揭煤区域内抽采盲区进行补充区域防突措施,并在揭煤区域外对煤层进行注浆.采用穿层长钻孔实现连续抽采和异地消突,联合注浆改变围岩条件加固顶底板形成安全屏障,钻孔抽采时产生的负压圈减少揭煤区域外的瓦斯涌入揭煤区域.结果表明:穿层长钻孔穿过平均层间距6.5 m的煤层10层,比常规揭煤方式少施工钻孔194个,节省抽采和施钻时间201 d,缩短揭煤时间67%,抽采总纯量多22.57万m^(3),总节资64.86万元.所提方法在缩短石门揭煤打钻抽采时间的同时,提高了石门揭煤安全性和瓦斯利用率,实现了安全快速揭煤.In order to solve the problem of long period and high frequency of rock cross-cut uncovering coal in Guizhou Songhe Coal Industry Development Co.,Ltd.,continuous pumping and rapid uncovering coal technology is put forward in nearby distance coal seam group.To use a long drilling hole to continuously extract gas in the frontal uncovered the coal seam area,at the same time,at the 7 m normal distance of uncovering the coal seam,supplementary regional outburst prevention measures should be taken for the blind area of extraction in uncovering the coal seam.Supplementary regional outburst prevention measures are carried out for blind area of extraction in the uncovered coal seam area,and grouting the coal seam outside the uncovered coal seam area.It uses long drilling to achieve continuous pumping and remote outburst elimination,and uses the joint grouting to change surrounding rock conditions,strengthen the roof and the bottom plate to form a safety barrier,and the negative pressure ring generated during drilling extraction to reduce the gas pouring into the uncovering coal area.The practice shows that the drilling hole has passed through 10 layers of coal seam with an average interval of 6.5 m.This method has 194 fewer drilling holes than conventional coal uncovering,which saves 201 days of pumping and drilling,and reduces uncovering time by 67%.The total quantity of drainage is 225700 cubic meters more than that of conventional uncovering coal,and the total saving is RMB 648600 yuan.This method allows us to shorten the time of uncovering coal at the same time,improve the safety and gas utilization rate of rock cross-cut coal uncovering,and to achieve safe and rapid coal uncovering.

关 键 词：近距离倾斜煤层群 快速揭煤 连续抽采 

分 类 号：TD713[矿业工程—矿井通风与安全]