Roof stability analysis of sublevel open stope and caving mining method

被引：0
|
作者：
Zhou, Zong-Hong [1 ]
Hou, Ke-Peng [1 ]
Ren, Feng-Yu [2 ]
机构：
[1] Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
[2] School of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning 110004, China
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2012年 / 29卷 / 04期
关键词：
Mine roof control - Finite element method - Stoping - Ore deposits - Room and pillar mining - Stability - Numerical methods;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The hanging wall and footwall of the XIV1 main ore body are unstable in Fengzishan lead-zinc deposit. The improved sublevel open stope and caving method was tested. Using three-dimensional finite element, the stability analysis of protective pillar and insulating pillar was presented. The distribution of stress, safety rate and plastic zone was analyzed, and the reasonable stope structural parameters were optimized in the four schemes. The results indicate that the thickness of protective layer has a significant influence on the roof stability, which improves with the increase of stope span during the room stoping. In addition, the roof stability decreases with the increase of stope span. It can effectively ensure the stope stability to select the suitable protective layer thickness and to control the stope span. The results can provide theoretical basis for the mining design and strata control.
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页码：538 / 542
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