综合物探解决黄土区煤田复杂地质问题

Application of Integrated Geophysical Prospecting to Solve Complex Geological Problems in Loessland

西某矿位于构造堆积盆地,属黄土丘陵地貌,区内被第四系黄土覆盖,为解决该矿地质构造及水文地质问题,采用三维地震勘探与瞬变电磁法、直流电测深法相结合的勘探方案。利用三维地震勘探解决目的层赋存形态及其地质构造问题,再利用瞬变电磁法进行平面控制,以使平面及深度解释误差达到勘探要求;应用直流电测深法及瞬变电磁进行勘探,在正反演解释的基础上对其资料综合分析、对比,并结合三维地震资料,确定地质构造的富水及导水性。

A coalmine in Shanxi is located in a tectono-sedimentary basin and the area is covered by Quaternary loess. To solve this area＇s structure and bydrogeological problems, we adopted an integrated 3D seismic, transient electromagnetic and DC electric sounding project. By the use of 3D seismic prospecting found out target occurrence and geological structure; transient electromagnetic method in planar control made plane and depth interpretation errors within code requirement; then DC electric sounding and transient electromagnetic method comprehensively analyzed and contrasted based on forward and inverse interpretation, finally combined with 3D seismic data to determine water yield property and transmissivity of geological structures.