Transient Electromagnetic Method Exploration and Evaluation of Coal pillar Integrity in Side Goaf
吴章涛WU Zhang-tao
(陕西彬长小庄矿业有限公司,咸阳713600 )
( Shaanxi Binchang Xiaozhuang Mining Co.,Ltd.,Xianyang 713600,China )
摘要;煤矿回采工作面侧帮留设的隔水煤柱是防止采空区积水涌入正在回采工作面的重要手段。针对留设防隔水煤柱完整性的快速探查问题,本文通过查阅文献和生产面临的实际问题,提出采用多方向小线圈的瞬变电磁法;通过在小庄矿40307回风顺槽对外侧帮留设煤柱探查,结果表明:留设煤柱在完整时瞬变电磁法等值线由近到远均匀变化,当煤柱局部破碎含水时,等值线在对应区域会有较明显畸变,视电阻率值变小,该研究成果为矿井治理水害提供了参考资料,也说明了多方向小线圈瞬变电磁法是探查留设煤柱完整性的有效技术手段。
Abstract: The waterproof coal pillar set up on the side of the coal mining face is an important means to prevent water from flowing intothe working face in the goaf. In response to the rapid exploration of the integrity of the reserved walterproof coal pillr, this aricle proposesthe use of a muli-directional small coil transient electromagnetic method through lierature review and practical prodluction problens;Through the exploration of coal pillrs left on the outer side of the 40307 return air channel in Xiaozhuang Mline, the resuls show that thecontour lines of the transient electromagnetic method change uniformly from near to far when the coul pillars are inlact. When the coalpillars are partially broken and contain water, the contour lines will have significant distortion in the corresponding area, and the apparentresistivity value will decrease. The research results provide reference materials for mine water conltrol, and also demonstrate that the muli-directional small coil transient electromagnetic method is an effective lechnical means to explore the integrity of reserved coal pillars.
关键词:回采工作面;侧帮采空区;留设煤柱;瞬变电磁法;评价
Key words: mining face; side goaf; reserve coal pillars; transient electromagnetic method; evaluate
价值工程-文章出处：吴章涛.侧帮采空区煤柱完整性瞬变电磁法探查评价[J].价值工程,2023,42(20):160-162. |
