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煤田采空区地层,地球物理场会形成两种不同类型的异常:一是与地表水垂直渗透有关的地表自然电场的异常发育,另一种是细粒土的流失导致的表层土电阻率背景值的升高异常。该文结合实际工程项目,研究利用不同类型的地面浅表地球物理特征来圈定采空区的实际范围,为采空区勘界提供可靠依据。
Two different types of anomalies are formed in the stratum and geophysical field in the goaf: one is the abnormal development of the natural surface electric field related to the vertical infiltration of surface water, and the other is the surface resistivity of the topsoil caused by the loss of fine-grained soil Abnormal increase in value. According to the actual project, this paper studies the use of different types of surface superficial geophysical characteristics to delineate the actual area of the goaf and provides a reliable basis for the demarcation of the goaf.