综合物探方法在隐伏导水地质构造探测中的应用
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摘要
为了准确预测煤层回采工作面地质构造及富水情况,基于矿井无线电波透视及瞬变电磁理论,对工作面中导含水隐伏地质构造进行无线电波曲线变化特征的正演模拟,探讨了无线电波透视探测导含水隐伏地质构造及随介质电阻率变化曲线特征,并在煤矿井下进行试验。研究得出,当隐伏地质构造含水且呈现低阻时,无线电波透视衰减曲线相对于透过高阻地质构造衰减幅度更大。回采工作面的采动变化会导致工作面内部形成新的导水裂隙带,因此结合无线电波透视技术和瞬变电磁技术,可以动态分析新的导含水地质构造的形成。经过在煤矿井下的试验验证,无线电波透视和瞬变电磁成果结合地质资料分析,可以相对准确判断工作面地质构造及富水区域的范围。
In order to accurately predict the geological structure and watery condition of coal mining face, based on the mine radio wave perspective and transient electromagnetic theory, the positive simulation of radio wave curve variation characteristics of the hidden conducting-water geological structure in working face was conducted, and the conducting-water hidden geological structure detected by radio wave perspective technology and the radio wave curve variation characteristics changing with medium specific resistivity were discussed, and its field test was carried out in the underground coal mine. It was concluded that when the hidden geological structure was containing water and low-resistance, the attenuation curve of radio wave perspective technology had more attenuation than that of geological structure with high resistance. The mining process led to the formation of new water-conducting fracture zone inside the working face, so combination of radio wave perspective technology and transient electromagnetic technology could analyze dynamically the formation of new water-conducting geological structure. Through the experimental verification in the underground coal mine, radio wave perspective and transient electromagnetic results could accurately determine the geological structure of the working face and the extent of the watery area by combining with geological data analysis.
In order to accurately predict the geological structure and watery condition of coal mining face, based on the mine radio wave perspective and transient electromagnetic theory, the positive simulation of radio wave curve variation characteristics of the hidden conducting-water geological structure in working face was conducted, and the conducting-water hidden geological structure detected by radio wave perspective technology and the radio wave curve variation characteristics changing with medium specific resistivity were discussed, and its field test was carried out in the underground coal mine. It was concluded that when the hidden geological structure was containing water and low-resistance, the attenuation curve of radio wave perspective technology had more attenuation than that of geological structure with high resistance. The mining process led to the formation of new water-conducting fracture zone inside the working face, so combination of radio wave perspective technology and transient electromagnetic technology could analyze dynamically the formation of new water-conducting geological structure. Through the experimental verification in the underground coal mine, radio wave perspective and transient electromagnetic results could accurately determine the geological structure of the working face and the extent of the watery area by combining with geological data analysis.
引文
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