关键词: 双坑配采, 露天矿, 剥采工程接续, 剥采比

Abstract: Aiming at the problems such as the production stripping ratio fluctuation caused by rivers in surface mine limit and the difficulties in connecting stripping and mining engineering，double pits coordinated mining method is put forward to regulate stripping ratio，increase the recover rate of resources，ensure the smooth connection of stripping and mining engineering.The applicable conditions for double pits coordinated mining，principles to decide the position of initial trenching，calculation method for advanced pit parameters and optimization of engineering splicing location are introduced in detail，and the difficulties in connecting stripping and mining engineering that occurred during the second river diversion in Yuanbaoshan surface mine is analyzed as a case.The results show that：the double pits coordinated mining method can effectively regulate the stripping ratio，get a smooth transition in the mining engineering，and thus significantly improve the economic efficiency of mine.

Key words: Double pits coordinated mining, Surface mine, Stripping and mining engineering splice, Stripping ratio