Research On Strip Mining Under Buildings Of Donghuantuo Coal Mine South 1st District

The coal under building contains 78% of possible reserves in Donghuantuo coalmine, it not only costs much waste of roadways, makes the mining supersession very difficult, it also results the annual output only being 0.8 million tons, causes much waste on production goods.By using theoretical analyzing, numerical simulation and spot surveying in this paper, it gets that strip mining can be used in Donghuantuo coalmine. By using A.H.Wilson strength theory, it brings out several strip mining parameter designs and predicted the surface subsidence and deformation of each design, then using FLAC^3D program with the survey results on spot to inspect the prior prediction, get the strip mining parameters that could be used in this coalmine.By using of strip mining in Donghuantuo coalmine, it not only can release supersession tension, prolong the service life of this coalmine; it also can give some guidance on solving three unders in coal mining by other coalmines.