矿井瞬变电磁在老巷探测中的应用

Application of mine transient electromagnetic in detection of old roadway

为了后期的资源整合,在地下纵横交错的巷道中发掘已采巷道,不仅可以减少巷道掘进的工作量,还可以对其加以利用充当排水通风通道,更重要的是在危急时刻可以躲避水害。为了摸清采掘工作面周围的老巷情况,对比以往的物探方法,矿井瞬变电磁法施工简便,施工效率较高,能清楚地反映异常位置。该物探法用于石墨矿井,由于探测的水平面位置较高,老巷中基本不含水,因此相对于围岩其电阻率较高,以此为理论基础寻找以往的老巷道。试验证明,运用矿井瞬变电磁勘探寻找以前的老巷道可行、有效。

In order to integrate the resources in the later stage of the mine,exploring the abandoned roadway in the underground crisscross roadway can not only reduce the workload of roadway excavation,but also use it as a drainage and ventilation channel,and more importantly,it can be used to avoid water disasters in the critical moment.In order to find out the situation of the old roadway around the mining face,compared with the previous geophysical methods,the mine transient electromagnetic method is simple,high construction efficiency,and can clearly reflect the abnormal position.When the geophysical prospecting method is used in graphite mine,the location of the horizontal plane is relatively high and the old roadway is basically not watery,so the resistivity is higher than that of the surrounding rock.Based on this theory,the old roadways in the past are searched.The test shows that it is feasible and effective to use the mine transient electromagnetic exploration to find the old roadway.