安太堡矿露井联采边坡稳定性研究及其边界参数优化

安太堡露天矿为我国最早合资开发的大型露天煤矿,近年来,该矿实施露井联采模式,给安太堡矿东南帮和南帮的边坡稳定性的保证和露井边界的确定带来了困难,严重影响安太堡矿的正常生产。通过综合研究,指出露井联采模式下的边坡主要存在两种破坏模式,其井工开采开切眼的位置是确定边坡稳定的关键因素。首次提出了以两种开采方法之间的垂直安全高度为判断依据,并以此依据确定了露井边界参数,为保证安太堡矿南帮的安全开采提供了依据。

STUDY ON THE SLOPE STABILITY AND OPTIMIZATION ON BOUNDARY PARAMETER UNDER OPEN-UNDERGROUND MINING OF ANTAIBAO OPEN PIT MINE

Antaibao open pit mine was the first large-scale joint venture open pit mine, during 20 years, several domestic and foreign research units have carried out same studies on the slope stability. In recent years, because the mode of open-underground mining have implemented in Antaibao open pit mine, it was difficult to ensure the eastern and southeast slope stability and establish the boundary under open-underground mining, which also severely affected the normal production. Trough integrated researches, pointed out that there were two failure modes of the slope under open-underground mining, and that the position of open-off cut under underground mining is the nuclear factor to ensure the slope stability. Firstly proposed to use the vertical height of safe mining between open pit mining and underground mining as criteria, and established the boundary parameter by the criteria, provided basis for ensuring the slope stability under the condition of open-underground mining.