利用内排土提高露天矿端帮边坡角的研究

在有、无内排土条件下，对6个均质边坡模型和伊敏一露天矿边坡模型的端帮边坡角进行了数值模拟计算与分析。结果表明，在安全系数不变的前提下内排土可以提高露天矿端帮边坡的最大稳定边坡角，从而减少了剥离量或增加采出矿石量，降低剥采比，提高矿山经济效益。

Study of using internal dumping increase angle of end wall in open pits

At the conditions of internal dumping and non-internal dumping, six homogeneous slope models and the slope model of the 1st Yimin open pit are founded, and solved these model’s angle of the end wall by FLAC3D program. The analyzed results demonstrated that the internal dumping can increase the maximum stable angle of the end wall in open pits at the same safety factor. So, using the internal dumping can decrease the waste volume or increase the ore’s production, reduce the stripping ratio, improve the mine’s economic benefit.