Preliminary Exploration and Site Suitability Evaluation of Goaf in Western Beijing
Due to the complexity of mining history and geological conditions,goaf exploration has always been a difficult point in engineering exploration.This paper focuses on the methods of surveying and evaluating the stability of goaf plots in western Beijing.The exploration method mainly adopts the combination of geophysical prospecting and drilling,in which the geophysical prospecting method adopts geological radar,high-density electrical method,magnetotelluric,shallow seismic,and micro-gravity methods.According to the different application scope,application conditions,exploration depth,and test results,representative survey lines are selected for geophysical interpretation.Combined with on-site drilling,the abnormal area was verified and the scope and depth of the goaf were delineated.On this basis,the stability of the goaf is qualitatively analyzed by the factors such as the final mining time,roof lithology,movement and deformation characteristics.And the stability of the goaf is quantitatively analyzed by the methods of the relationship between the goaf collapse fracture zone and the mining depth,the residual deformation of the goaf,and nu-merical simulation.
万方数据
维普
