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采场边界线与所处原始应力场方向间的几何关系,影响着采场周围次生应力的分布规律。本文就广西某矿急倾斜矿体采用分段空场法的开采现状,利用无界无法进行了平面应变条件下的弹塑性数值模拟研究,认为中段矿柱的稳定性是整个采场系统稳定性的关键,合理控制矿柱中塑性区的大小,使矿柱不产生拉破坏,可充分利用矿柱的自承能力,减少矿柱矿量。
The geometrical relationship between the stope boundary line and the direction of the original stress field affects the distribution of secondary stress around the stope. In this paper, the mining status of a sharply-tilted orebody in a mine in Guangxi Province is analyzed by the segment-space method. The elasto-plastic numerical simulation under plane strain can not be carried out. It is considered that the stability of the middle pillar is the stability of the entire stope system The key is to reasonably control the size of the plastic zone in the pillars, so that the pillars will not be pulled and damaged, and the self-bearing capacity of the pillars can be fully utilized to reduce the amount of ore pillars.