大规模开采上覆贫矿体岩移规律

The Strata Movement Rule of Overlying Poor Ore with Massive Mining

针对甲玛铜矿大规模开采上覆贫矿体岩移规律及其控制技术开展研究。通过数值分析,研究得到采场开采及充填后上覆岩层位移及应力分布;通过开展相似模型实验研究,得到大规模盘区开采及充填后上覆岩体位移及变形规律。研究结果表明,数值模拟与相似模型试验结果具有较好的一致性;大直径束孔高分段空场嗣后充填法开采上覆贫矿体的岩移及应力变化受到近域的采场盘区开采的影响较为显著;地下采矿活动引起的地表变形影响较小。

The research was carried out based on the strata movement rule of overlying poor ore with massive mining and the control technique. Through the numerical analysis, the displacement and stress distribution of overlying ore after mining and filling have been gained; through carrying out the similarity model test, the displacement and deformation rules overlying ore after mining and filling in large scale panel have been gained. The resuhs show that, the numerical simulation has a good consistency with the model test in results. The rock movement and stress changes of overlying poor ore mined by large-diameter bundle hole high sublevel cut and fill mining method are significantly affected by the mining of the adjacent mining panel. The surface deformation caused by underground mining activities is negligible.