Abstract:In order to study the process of large-scale overlying strata collapse under the influence of mining in a certain mining area, on the basis of macroscopic rock mechanics parameters，the dynamic development process of large-scale overlying rock collapse and caving under the condition of continuous excavation and unloading in different middle sections is analyzed by using the discrete element method program 2D-block. The simulation results show that with the continuous mining of the deep orebody, the overlying rock mass cave and collapse scope increases gradually, the collapse of overburden strata has a certain hysteresis. The maximum collapse range of overburden strata are respectively 25m, 42m and 42m after 13, 14 and 15 middle section are mined; the maximum collapse range of overlying rock are respectively 76m, 97m and 110m after 16, 17 and 18 middle sections are mined.