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为了研究压帮内排参数变化对于不平衡地应力及端帮稳定性的影响,基于内排台阶的发展规律及靠帮开采的关键理论,采用FLAC软件对哈尔乌素露天煤矿北端帮边坡进行三维模拟,记录靠帮开采过程中产生的不平衡地应力及压帮内排产生的收敛效应,同时分析压帮内排对端帮稳定性的增效效果。结果表明:内排台阶能较好地抵消不平衡地应力,并呈现出良好的线性变化规律;内排参数按一维变化时,边坡稳定系数与内排宽度符合二次函数,与内排高度符合一次函数;内排参数按照三维变化时,边坡稳定系数与之表现为良好的指数函数关系。
In order to study the influence of pressure change on internal parameters on unbalanced geostress and stability of end dam, based on the development rule of internal step and the key theory of leaning to help mining, The three-dimensional simulation was carried out to record the unbalanced stress generated during the leaning and the convergence effect of the compression-assisted internal discharge. Meanwhile, the synergistic effect of the pressure-assisted internal discharge on the stability of the end-to-end compression was analyzed. The results show that the inner row of steps can better offset the unbalanced stress and show a good linear variation. When the inner row parameters change by one dimension, the slope stability coefficient and inner row width fit the quadratic function, Highly consistent with a linear function; slope parameters in accordance with the three-dimensional changes in the row with the performance as a good exponential function.