元宝山露天矿改河期间剥采工程接续方式

针对露天矿境界内河流引起生产剥采比波动及剥采工程接续困难的问题，提出了采用双坑配采的方法，调节构筑物移设期间的生产剥采比，提高资源回收率，确保剥采工程平稳接续。详细介绍了双坑配采的适用条件、超前坑拉沟位置确定原则、拉沟长度的计算方法以及接续工程位置的优化方案，结合元宝山露天矿二次改河期间剥采工程接续问题进行了实例分析。结果表明：双坑配采可有效调节生产剥采比，实现矿山工程平稳过渡，显著提高矿山经济效益。

Stripping and Mining Engineering Splice during the River Diversion in Yuanbaoshan Surface Mine

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.