摘要
近年来由于耗能单位对煤矿资源的需求急剧攀升,安全问题便成为一个突出问题。矿井突水灾害是煤矿开采中特大事故类型之一,因此采矿前期的一个重要的地质任务就是探测采区内构造的分布及地层的含(导)水性,查明是否存在断层、溶洞、裂隙等对开采可能带来不良影响的地质构造。岩层中的孔隙水会使岩层电阻率降低,而瞬变电磁法对低阻导电层的反映相当灵敏,且探测深度大,工作效率高,与其它电探方法相比,利用瞬变电磁法进行地下水勘查具有明显的优势。本文结合河南新安矿区实例介绍了瞬变电磁法在煤矿采区勘探中有关理论测深、野外施工技术方法及资料处理解释方面的应用及方法技术。本次勘探利用该方法基本查明了深部含(导)水构造,圈定了含(导)水岩溶带,为煤矿开采防治矿井水灾害问题提供了重要的地质信息。
Lots of new mines are built recently because the demand for coal resources is rising greatly. And the safety of the coal exploration becomes a serious problem. One type of serious accidents occurred in mine exploitation is water irruption. So an important geological detecting task is to find out the ledges＇ structure distribution and water - bearing properties and to confirm if there exist fault, Karst caverns, cranny whose structures may cause some danger. TEM is quite suit for the target in this condition because the signal is sensitive to the conductive layers. In this article, it introduces the principium, working method and data processed in mine exploitation. This method proves the deep geological structures, and find out the edge of the Karst area where the layers＇ water content is very high. So it offers credible hydrological geologic information for preventing the water irruption.
出处
《工程地球物理学报》
2006年第4期283-287,共5页
Chinese Journal of Engineering Geophysics
关键词
水灾害
瞬变电磁法
含水构造
TEM
deep geological structures
water- bearing properties
