巷道掘进工作面瞬变电磁超前探测模拟及应用

Simulation and Application of Advanced Detection for Water-bearing Body Ahead of Driving Tunnel with Transient Electromagnetic Method

为快速、准确地超前预报巷道掘进前方异常地质体及采取相应的水防治技术措施,在室内水槽试验的基础上,通过构建巷道前方低阻异常模型,对不同距离低阻体的响应特征进行模拟与分析,为现场探测应用提供依据。淮南某矿底抽巷道探测实践表明,沿巷道掘进前方60～75 m段视电阻率值较低,初步判断该段岩层裂隙发育,含少量水;且与该范围相对应的底板两侧也存在不同程度的含水区,而其他探测区域视电阻率值则相对较高,富水性差。该探测结果与后续的生产实际情况吻合。

In order to predict rapidly and accurately abnormal geological body（AGB） ahead of tunnel and take technology measures of water prevention and control,indoor water flume（TEM） experiments were made,a model for abnormality of low resistivity ahead of tunnel was built,and response characteristics of low resistivity abnormality at different distances were simulated and analyzed.The results show that TEM can be used to detect AGB.The detecting method was used in the coal and rock laneway of Huainan mine.the both sides of the floor also exist the varying degree water area,while the other detection zone apparent.Detection results accord well with the actual condition.