瞬变电磁法多点交叉勘探煤矿断层有效性实验分析

Experimental analysis of effectiveness of transient electromagnetic method in multi-point cross exploration of coal mine faults

为了验证瞬变电磁法在煤矿断层多点交叉勘探中的有效性,提出了瞬变电磁法多点交叉勘探矿井断层有效性实验。选择W煤矿作为研究区,根据井下条件确定了施工工艺参数,选取循环周期为9个、符号宽为1/10000 s的m序列作为勘探激发源的发光信号;根据瞬变电磁法的探测原理预处理试验数据;构建瞬变电磁法勘探模型,验证瞬变电磁法在矿井断层多点交叉勘探中的有效性。实验结果显示,随着发射源距地面距离增大,瞬变电磁法能够勘探异常响应的勘探深度越大。探测到的断层与实际情况基本一致,证明瞬变电磁法多点交叉勘探煤矿矿井断层的有效性。

In order to verify the effectiveness of transient electromagnetic method in multi-point cross exploration of faults in coal mines,experimental analysis of the effectiveness of transient electromagnetic method in multi-point cross exploration of coal mine faults is proposed.W coal mine is selected as the research area,and the construction process parameters are determined according to the underground conditions.The object sequence with a cycle period of 9 and a symbol width of 1/10000 s was selected as the luminescent signal of the exploration excitation source,preprocess the test data according to the detection principle of transient electromagnetic method.A transient electromagnetic exploration model is built to verify the effectiveness of transient electromagnetic method in multi-point cross exploration of faults in coal mines.The experimental results show that with the increase of the distance between the launch source and the ground,the exploration depth of the TEM can explore the abnormal response is larger.The detected faults are basically consistent with the actual situation,which proves the effectiveness of the transient electromagnetic method for multi-point cross exploration of faults in coal mines.