Abstract: Aiming at ore extraction under complex geological conditions, considering the character of a illustrated mine, mining sequences of different levels vertically and horizontally (5 solutions in total) were analyzed by adopting numerical simulation.The best extraction solution by comparing indicators of ground stress distribution, moving rules of surrounding rocks and water pressure aggregation at void spaces were gained.The result shows that for the II3 ore body of the mine, a top-down mining sequence shall be adopted for mining levels, and the ore extraction in a level shall start from the centre and expand toward two ends.

Key words: Complex geological conditions, Ore body, Mining sequence, Numerical simulation