端帮靠帮开采稳定性分析与经济效益研究

利用靠帮开采的相关理论，提出了端帮靠帮开采的边坡稳定性分析的2种方法，建立了由靠帮开采带来的经济效益研究模型和节约的二次剥离成本计算模型。以我国北方某露天矿为例，确定了一条区的两侧端帮边坡角可以由37°分别提高到44°和42°，由此每年可以获得的经济效益为11 692.112万元，每年可以节约一二条区之间的二次剥离成本1 662.287万元。结果表明：对我国大型近水平露天煤矿实施端帮靠帮开采，在技术上是可行的，具有很好的经济效益。

Research on the Slope Stability Analysis and Economic Benefits of Steep End-Slope Mining

Two methods of slope stability analysis for steep end-slope mining are proposed by using the related theory of steep end-slope mining，and the research model of the economic benefits by the steep end-slope mining and the calculation model of the secondary stripping costs are set up. Taking a surface coal mine in the north of China for example，the bilateral end-slope angles in the first strip area can be increased from 37° to 44° and 42° respectively. By this method，about 116 921 120 yuan of economic benefits can be obtained and 16 622 870 yuan of the secondary stripping costs between the first and the second strip area can be saved each year. The result showed that it is technically feasible to adopt the steep end-slope mining in large-scale surface coal mine with flat coal seam in China and this mining method can bring large economic benefits.