| The casting blast plus dragline stripping mining technology is a new kind of mining technology in the oversize surface mine in our country. In this paper, the problem that there are slope destruction occurred in dragline operation and the optimization of operating parameters in Heidaigou Surface Coal Mine is researched. Based on field research and theoretical analysis, Rigid Body Limit Equilibrium Method, and computer numerical simulation technology are synthetically used to research the stability of the high solid bench and the loosen bench that was formed after blasting used in dragline operations. Then the reasonable bench parameters were identified and it was verified in Heidaigou Surface Coal Mine, at the same time, it also provides effective accordation for the applied research, engineering design and plant supervision of dragline stripping mining technology in China.
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