Application of microtremor survey and high density electrical method in exploration of small-scale old goaf
JIA Xu1,2, SUN Jianwei1, LIU Xiangdong1, CHENG Xianda1, HUANG Honglin1
1. Xi'an Center of Mineral Resources Survey,China Geological Survey, Shaanxi Xi'an 710100,China;
2. School of Geophysics and Information Technology, China University of Geosciences(Beijing), Beijing 100083,China
Abstract:The oil shale old goaf in Zhaozhuang Village of Luanchuan County has posed a certain threat to the local living environment. However, this goaf has small scale, complex distribution, and interference from crowded people, which made it difficult for detection. In order to detect the goaf effectively, the authors in this paper proposed a combined detection method of microtremor survey and high-density electrical method. The two-dimensional apparent velocity and resistivity profiles were obtained through data acquisition and processing. Then, the oil shale rich layer was identified as medium resistivity layer with approximate layered distribution in the resistivity profile, and the oil shale goaf was identified as low velocity anomaly area in the horizontal direction of medium resistivity layer, according to the actual geological condition. The verified results from drilling indicate the inference results of the combination method are basically consistent with the reality, which prove the combination method is feasible for the exploration of small-scale ancient goaf of oil shale, with strong anti-interference features and high-efficiency construction.
贾煦, 孙建伟, 刘向东, 程贤达, 黄虹霖. 微动勘探与高密度电法在小尺度老采空区探测中的应用[J]. 中国地质调查, 2022, 9(6): 42-50.
JIA Xu, SUN Jianwei, LIU Xiangdong, CHENG Xianda, HUANG Honglin. Application of microtremor survey and high density electrical method in exploration of small-scale old goaf. , 2022, 9(6): 42-50.
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