巷-孔瞬变电磁探测技术在煤矿老空区防治中的应用

Application of roadway-hole transient electromagnetic detection technology in the prevention and control of old goaf in mines

煤矿老空区水害具有突发性强、涌水量大、破坏性强等特点,是制约煤矿安全生产的重大隐患,且老空区开采历史久远,积水量大,图纸资料不全,具体位置很难准确掌握。常规瞬变电磁探测受外界因素干扰较多,准确率不高,而孔内瞬变电磁探测主要在钻孔内进行,干扰因素少,探测位置更接近目标,准确率较高。巷-孔瞬变电磁探测技术即上述2种方法综合探测技术,能够做到相互弥补,相互验证,有利于老空区范围的准确圈定。

The water damage in old goaf is characterized by strong suddenness,large water gushing and destructive,which is a major hidden danger to the safe mining.Conventional transient electromagnetic detection is disturbed by external factors,and the accuracy rate is not high,while in-hole transient electromagnetic detection is mainly carried out in the borehole,with fewer disturbing factors,and the detection location is closer to the target,so the accuracy rate is higher.Roadway-hole transient electromagnetic detection technology,can make up and verify each other,and is conducive to the accurate enclosure of the old goaf.