Prediction And Analyses Of Collapse Of Mined-out Area At Daliuta Mining Area

Collapse of mined-out area is an environmental geological hazard of the coal mining area. There is abundant coal resource at Daliuta mining area, Shenmu County in Shaanxi Province. Exploitation and utilization of coal and occupation and destruction have been occurring together in the area, which has induced various geological disasters to occur repeatedly. Among these disasters, collapse of mined-out areas is the most common and serious one.This thesis has analyzed the relations between the geological condition and the collapse of mined-out area firstly. Then, the mined-out area's collapse actuality, features and influence factors, formation mechanism, and effects caused by it has been researched. Finally, based on the data got on the spot, the probability integral method and the finite element simulation were separately used to predict and analyze the collapse development tendency of the No.1203 working face of the Daliuta coal mining area.