瞬变电磁法在磷矿富水性中的探测方法研究  

Study on Detection Method of Transient Electromagnetic Method in Water Rich Phosphate Rock

作　　者：王智聪 张军 Wang Zhicong;Zhang Jun(Xi’an Research Institute,China Coal Technology&Engineering Group.,Xi’an Shanxi 710077,China)

机构地区：[1]中煤科工集团西安研究院有限公司,陕西西安710077

出　　处：《工程地球物理学报》2022年第6期769-775,共7页Chinese Journal of Engineering Geophysics

基　　金：国家重点基础研究发展计划资助项目(编号:2017YFC0804100)。

摘　　要：随着我国磷矿资源开采深度不断向深部延伸,磷矿在开采巷道掘进过程中面临的水文地质条件也越来越复杂,如何减少或解决磷矿巷道掘进过程中突水事故的发生,成为亟待解决的研究课题。矿山掘进超前探水主要使用瞬变电磁超前探测法,在磷矿巷道超前防治水探测中,使用该方法有效反映巷道前方及周围岩体内的含水、导水构造的三维空间分布特征,为巷道水害超前治理提供重要依据。首先介绍了瞬变电磁法的施工布置方法,然后根据目前矿井瞬变电磁探测过程中存在的问题,对常规测线布置方法进行了改进,消除了常规方法侧帮锚网支护的影响,同时对数据处理方法进行了改进,加入了电流校正算法与地层影响校正算法。最后将改进后的瞬变电磁探测方法应用于磷矿巷道迎头超前探水,通过对现场采集数据的处理与分析,查明了迎头超前含水地质异常体。结合钻探验证的情况,证明了瞬变电磁法在磷矿具有良好的应用效果,同时验证了改进后的测线布置方法和数据处理方法的可靠性,为掘进巷道的精确超前探水提供了重要的依据。With the continuous extension of the mining depth of phosphate rock resources in China,the hydrogeological conditions faced by phosphate rock in the process of mining roadway excavation are becoming more and more complex.How to reduce or solve the occurrence of water inrush accidents in the process of phosphate rock roadway excavation has become an urgent research topic.The transient electromagnetic advance detection method is mainly used for the advance water detection of mine excavation.In the advance water prevention and control detection of phosphate mine roadway,this method can effectively reflect the three-dimensional spatial distribution characteristics of water bearing and water conducting structures in the rock in front of and around the roadway,and provide an important basis for the advance treatment of roadway water damage.This paper introduces the construction layout method of transient electromagnetic method.According to the problems existing in the process of mine transient electromagnetic detection,the conventional survey line layout method is improved to eliminate the influence of the conventional method on the side wall anchor mesh support.At the same time,the data processing method is improved,and the current correction algorithm and formation influence correction algorithm are added.The improved transient electromagnetic detection method is applied to the head-on advance water detection of phosphate mine roadway.Through the processing and analysis of the field collected data,the head-on advance water bearing geological anomaly is found out.Combined with the drilling verification,it is proved that the transient electromagnetic method has good application effect in phosphate rock,and the reliability of the improved survey line layout method and data processing method is verified,which provides an important basis for the accurate advance water detection of tunneling roadway.

关 键 词：瞬变电磁 超前探测 磷矿 掘进巷道 校正算法 

分 类 号：P631.3[天文地球—地质矿产勘探]