煤矿多含水层富水性变化规律瞬变电磁法动态监测技术

Transient electromagnetic dynamic monitoring technology for variation law of water enrichment in multiple aquifers of coal mine

煤层采动过程中,顶底板应力平衡受到严重破坏,造成裂隙发育,形成离层水或导通隐伏构造等,进而造成矿井突水灾害。这些灾害大都为滞后突水,对煤矿安全生产会产生极大的危害。传统物探方法在开采前的静态探测,所圈定的富水异常区并不能解决该问题。为了解决这一问题,可采用瞬变电磁法动态监测煤矿多含水层富水性变化规律,以达到预防矿井滞后突水灾害的目的。应用表明,开展煤矿多含水层富水性变化规律瞬变电磁法动态监测,取得良好的探测效果,值得在煤矿预防滞后突水灾害中进行推广。

In the process of coal mining,the stress balance of the roof and floor is seriously damaged,which leads to the development of fractures,the formation of separated water or the conduction of concealed structures,etc.,and then causes the mine water inrush disaster.Most of these disasters are lagging water inrush,which has great harm to coal mine safety production.The static detection before mining by traditional geophysical prospecting methods can not solve this problem by delineating the water-rich anomaly area.In order to solve the problem,the transient electromagnetic method can be used to dynamically monitor the change law of water enrichment of multiple aquifers in the coal mine,so as to achieve the purpose of preventing the delayed water inrush disaster.The application example shows that the transient electromagnetic dynamic monitoring of the change law of water enrichment in multiple aquifers has achieved gooddetection results,and is worth popularizing in the prevention of delayed water inrush disasters in coal mines.