矿井综合物探技术在封堵特大型突水中的应用

Application of Mine Comprehensive Geophysical Exploration Technology to Seal Extra Large Water Inrush

为了缩短工期和有效封堵华兴矿27080工作面采空区特大型奥灰突水,通过采用天然电场选频法、瞬变电磁法和超低频遥感探测法等3种综合物探手段,将探查出来的物探异常区的重叠区域作为疑似奥灰富水区和导水通道的位置,并据此调整堵水方案,在物探异常区的重叠区域补打2个钻孔;通过新老钻孔对富水区域进行注浆充填堵源,2个月内封堵率达到100%;钻探、注浆和效果均验证了所圈出的疑似奥灰富水区和导水通道位置的可靠性。实践证明:采用综合物探技术,能弥补单一物探方法的缺陷,将重叠的异常区作为靶区更加可靠和有效。

In order to reduce the construction period and effectively seal a ultra large Ordovician limestone water inrush in the goaf of No.27080 coal mining face in Huaxing Mine,with the application of three comprehensive geophysical exploration means with the frequency selection method of the natural electric field,the transient electromagnetic method and the ultra low frequency remote sensing method,the overlap area in the geophysical exploration of abnormal overlap zone was taken as the seemed watery area in Ordovician limestone and the location of the water flow channel.Based on the adjustment of the water sealing plan,two borehole drillings were made in the overlap region of the geophysical exploration abnormal zone.The old and new drilled boreholes were applied to make the grouting and backfill to seal the sources in the watery region and the water sealing rate could be 100% in two months.The drilling exploration,grouting and effects showed that the reliability of the proposed Ordovician limestone watery zone and the water flow channel location marked were verified.The practices showed that the application of the comprehensive geophysical exploration technology could make up the shortage of a single geophysical exploration and could be more reliable and efficient to take the overlap abnormal zone as a target zone.