煤矿采空区EH4电磁法勘查试验

The EH4 Electromagnetic Prospecting Test in Coal Mine Goaf

煤矿采空区对人类生产和生活危害巨大,对采空区的勘查已成为重要的研究课题。首先介绍了EH4电磁法的工作原理,并利用其轻便灵活、受地形和场地限制小以及分辨率较高的特点,将其应用到煤矿采空区探测中;然后通过在3个矿区进行的试验实例,分析EH4观测系统的抗干扰能力,探寻其在单层和多层煤矿采空区勘查方面的效果,研究总结采空区的异常特征并得出结论。试验结果表明:在没有强电磁干扰地区,EH4电磁法探测煤矿采空区可以取得较好的效果;且当多个煤层的采空区相互叠加时,如果煤层间具有一定的距离,可区分出各煤层的采空区。

Mine goals are harmful to human production and life, so the exploration of mined-out areas has become an important research topic. This paper introduces the principle of the EH4 electromagnetic method. Because it is light, flexible and hardly restricted by terrain and ground with high resolution, the EH4 can be used to detect coal mine goaf. Through the experiments in three mining areas, the anti-interference ability of the EH4 observation system is analyzed. And its exploration results in monolayer and multilayer goaf are needed to know, so the patterns of the abnormal characteristics can be concluded. The test results show that it can get good results to use EH4 electromagnetic method to detect coal mine goal in the area without strong electromagnetic interference, especially for the superimposed coal mine goals. If there is a distance between the layers, the coal mined out area can be distinguished in each layer.