Study On The Features Of Rockmass Structure Mechanics And Estimate Water-Burstings Risk Of Karst Collapse Column

Combined with systemic research of the characters of the hydrogeology and engineering geology in coalfields of northern Anhui province, the paper discusses character of unlike stratum that can effect the forming process of karst collapse column , summarizes grow-up conditions , dissects the features of rockmass structure mechanics , advances types of water-bursting, and gives their index system for macroscopic prediction. By the view point of rockmass structure ,the author believes that water-burstings of karst collapse column result from rifts process because of water dynamic and press of excavated coal. On the laboratory of rock permeability, the paper analyzes the infection of ground-water permeating flow. At last , the authors predicates the water-burstings risk of karst collapse column by numerical simulation.