Application of Multiple Physical Exploration Methods in Survey of the Goaf
Due to the influence of mining technology,some coal mines may leave goaf in the rock mass after mining.If the distribution pattern and impact range of goaf cannot be accurately identified and controlled,it will bring great safety hazards to subsequent coal mining.Firstly,various geophysical methods such as transient electromagnetic method(TEM)and controllable source audio magnetotelluric method(CSAMT)were used to investigate in detail the distribution and water accumulation in the goaf of a coal mine in Shanxi Province.Then,the drilling detection method is used to verify the range of goaf obtained from various geophysical surveys.The results indicate that the use of transient electromagnetic method and controllable source audio magnetotelluric method,combined with drilling detection method,can achieve the goal of precise exploration of coal mine goaf.
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