露天煤矿岩质高边坡下充填开采研究

为研究在露天煤矿岩质边坡下开采对边坡稳定性的影响,以阜新矿区某露天煤矿边坡为研究对象,采用相似材料模拟进行边坡下充填开采的研究,并使用有限元软ADINA建立三维模型,采用有限元折减法计算了未开采、全陷开采和充填开采边坡的安全系数。研究表明,充填开采后边坡的安全系数明显大于全陷开采的安全系数,充填开采能有效地控制露天矿岩质边坡的移动和变形,边坡的位移值沿坡脚向坡顶方向逐渐减小,对边坡稳定影响较大的因素为坡顶边缘位置的水平移动和水平变形,在露天煤矿岩质边坡下进行充填开采是切实可行的。

Research on backfill mining under high rock slope of open pit

In order to study the influence of open pit mining on the stability of rock slope,taking the slope of a surface mine in Fuxin as the research object,the backfill mining under the slope was simulated using similar material experiments.A three-dimensional model was established using the finite element software ADINA,and the safety factors of the slopes of untapped,full-subsidence and backfill mining were calculated using the finite element reduction method.The analysis results show that the safety factor of the backfill mining was significantly larger than that of the full-subsidence mining;that the backfill mining can effectively control the displacement and deformation of the rock slope of open pit;that the displacement of the slope decreases gradually from the toe to the top;that the horizontal displacement and deformation of the edge of slope top have most influence on the stability of the slope.The backfill mining under the rock slope of open pit is feasible.