某煤矿典型CSAMT法视电阻率曲线的一维模拟  

1-D Simulation on model apparent resistivity curve of CSAMT method in certain mine

作　　者：龚飞[1] 底青云[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029

出　　处：《地球物理学进展》2004年第3期631-634,共4页Progress in Geophysics

基　　金：中国科学院知识创新项目(KZCX3 SW 134)资助.

摘　　要：　了解煤矿开采区的地层地质情况,指明断层、破碎带、陷落柱等构造及其含水性,并分析其对开采过程中可能造成的安全威胁是煤矿安全生产的重要保证.可控源音频大地电磁测深(CSAMT)法是浅层地球物理勘探的一种有力的手段,可以用来探明从地表到地下1500米范围的地质情况.在开采区完成三维地震勘探,对构造有了较系统的控制后,利用电法CSAMT手段重点来分析构造及地层的含水及富水特性,是一种科学的工作流程.本文采用一维正演方法对该矿区典型的CSAMT视电阻率曲线进行模拟并与实际曲线进行了对比.通过大量的模型拟合,得到了较好的拟合效果,这对反演解释提供了有用信息.It is important to safe exploitation in mine by knowing geologic property of the exploitable area, including information of fault, falling body and water bearing fracture, and make sure that how dangerous in mining. The CSAMT method is the short name of the Controlled Source Audio frequency Magneto-Telluric method, it is one of the most powerful exploration methods of applied geophysics. CSAMT method can get the geologic information from the earth's surface to 1500m underground around. It is a scientific way that using the 3D seismic exploitation method to get the structure of the mine area firstly, and then use CSAMT method emphases in analyzing the water bearing character of the structure and the stratum. In this paper, we use 1D forward modeling method to simulate some type apparent resistivity curves of CSAMT method, and compare to the actual curve collecting in mine area. After large numbers of modal simulating, we get some good result. It is useful for us to get more preferable inversion result.

关 键 词：CSAMT 视电阻率 一维正演模拟 

分 类 号：P631[天文地球—地质矿产勘探]