地面-巷道瞬变电磁法探测采空区积水的应用

为探测呈祥煤矿副斜井在3#煤层下方是否充水,进行了地面-巷道瞬变电磁探测技术的应用。结合一矿81402工作面上方存在不明采空积水区、距离较远、井下正常超前物探难以覆盖的现状,制定了地面-巷道瞬变电磁探测方案。应用过程中发现,相对传统瞬变电磁法,地面-巷道瞬变电磁法受地形影响较小,对浅部数据地质信息反应较好,所观测的数据质量比较高。此外,3条巷道对采空区积水的位置有反映,与调查的采空区积水位置基本一致。实践表明,探测结果为采空区积水的防治提供了参考依据,可以运用到类似工程问题的实践中。

Application of ground-roadway transient electromagnetic method in detecting goaf water

In order to detect whether the auxiliary inclined shaft under the No.3 coal seam in Chengxiang coal mine is filled with water,the application of ground-roadway transient electromagnetic detection technology is carried out.Based on the situation that there is an unknown goaf water area above the No.81402 working face and it is difficult to cover with the normal underground geophysical prospecting,the ground-roadway transient electromagnetic detection scheme was developed.The application practice shows that,compared with the traditional transient electromagnetic method,the ground-roadway transient electromagnetic method is less affected by the terrain,has better response to the shallow geological information,and has higher quality of the observed data.In addition,the detection and investigation of the goaf water position is basically the same.The practice shows that the detection results provide a reference for the prevention and control of water accumulation in goaf,and can be applied to the practice of similar engineering problems.