可控源音频大地电磁法对断层探测的适用性分析

Applicability analysis of controllable source audio magnetotelluric method for fault detection

为了研究可控源音频大地电磁法对地下隐伏断层探测的适用性,本文以贵州省黔西县青龙煤矿为研究对象,通过在矿区内选择布设物探勘测线和钻探孔,利用可控源音频大地电磁法探测成果资料对区内断层进行解译,结合钻探资料进行分析。结果表明,区域内采用可控源音频大地电磁法探测解译断层与钻探揭露情况在垂向上有所差距,但相较于钻探,CSAMT法可以较直观的对整个区域内断层的走向、倾向进行判断,因此CSAMT法对于断层的判断仍具有重要意义和广泛的适用性,单纯依靠CSAMT法探测数据对断层进行判断具有较大的局限性,因此在采用CSAMT法对断层的解译过程中应加强对地质、已有钻探资料的结合分析,增强解译成果资料的可靠性。

In order to study the applicability of controlled source audio magnetotelluric method to the detection of underground concealed faults,this paper took Qinglong Mine in Qianxi County,Guizhou Province as the research object.By selecting and arranging geophysical detection survey lines and drilling detection holes in the mining area,the results of controlled source audio magnetotelluric method were used to interpret the faults in the area,and the drilling detection data were analyzed.The results showed that there was a gap in the vertical direction between the controlled source audio magnetotelluric method and the drilling detection exposure in the region.However,compared with drilling detection,the CSAMT method could more intuitively judge the trend and tendency of the faults in the whole region.Therefore,the CSAMT method was still of great significance and wide applicability for the judgment of faults.It had great limitations to rely solely on the CSAMT detection data to judge the faults.Therefore,in the process of using the CSAMT method to interpret the faults,the combination of geological and existing drilling detection data should be strengthened to enhance the reliability of the interpretation results.