Detection of former goaf and analysis of deformation characteristics of overburden in Dameidong coal mine

In order to analyze the deformation of old goaf in Dameidong Coal Mine and its influence on surrounding rock soil layer, it provides guidance for prevention control geological disasters region. this paper, transient electromagnetic method numerical simulation were used study law overlying strata mining area. The results detection showed that subsidence area was within range elliptical water-rich area, average buried depth expected be 90 m. model established by discrete element variation overburden rock. stress change coal mainly reflected at both ends goaf, which a concentration phenomenon. Overburden changed with process. displacement highly coincident, consisted monitoring map, showing “U”-type distribution. proved do have theoretical control.