Research on the development characteristics of the"two zones"of overburden rock in the large mining height fully mechanized mining area
This paper conducts a study on the exploration of the"two zones"of overburden rock in the 9-204 working face of Dianping Coal Mine.A comprehensive exploration is conducted on the development of the roof caving zone and water conducting fracture zone in the 9-204 working face using the dynamic monitoring method of resistivity,the segmented water injection observation method with double end sealing,and the dynamic monitoring method of overburden failure resistivity.The detection results of the three methods are analyzed.Based on the probability integral method,the relationship between surface subsidence characteristics and the development height of the"two zones"under high mining conditions is discussed.A layout plan for surface rock movement observation stations is designed based on the geological conditions of the 9-201 working face.The research results can provide reference for the prediction of mining activities and surface protection after the subsequent elevation of mining areas.
large mining height"two zones"of overburden rocksurface subsidenceprobability integral methodrock movement observation
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