Abstract: Affected by illegal mining, waste rock mixed, low productivity of ore, the increasing difficulty mining of deep ore body exploitation and slow development, the southern district of Xishimen has some production problems, such as great production pressure, low grade of raw ore, difficult to transition.Therefore, according to the analysis of rock caving feasibility, a new scheme that the upper low grade ore and the lower high grade ore are exploited simultaneously is proposed.The mining technique also improves the production capacity and realizes the objective of the simultaneous exploitation of low and high-grade ore by improving the mining method.In addition, the technical measure of excavating in sublevels simultaneous is proposed to accelerate the development process in deep part.

Key words: Rock caving feasibility, Simultaneous exploitation of low and high-grade ore, High-speed development