中南大学学报（自然科学版）2017，Vol.48Issue(10)：2723-2731,9.DOI:10.11817/j.issn.1672-7207.2017.10.023
干堆排尾对露天坑坑下采场稳定性的影响
Influence on underground mining stability of stope during stacking dry stacked Gangue in open-pit
摘要
Abstract
In view of Tong-lü-shan underground mining shifted from open-pit using dry stacked Gangue technology, the numerical simulation software combined with the strength reduced methods and the displacement mutation characteristics of monitoring points was used to analyze failure features of goaf and stability safety coefficient under different heights of dry gangue. Feasibility analysis about stacking gangue was done. The results show that when there is no tailing loaded, the optimal thickness of boundary pillar is 20 m and the allowed spans are more than 34 m. The form of goaf failure is that both ends of roof are shear failure; When it begins to load tailings and the span is more than 30 m, the stope collapse and the area of rock's plastic deformation is obvious; When the tailing loaded exceeds 160 m, the area of stope's plastic zone and roof displacement rapidly increase, and the stacking gangue to the extent of goaf damage also increases considerably, which may further reduces the reasonable span of the stope.关键词
露天坑堆尾/境界顶柱/地下采场稳定性/动态监测/数值模拟Key words
tailings discharge into open-pit/crown pillar/underground stope stability/dynamical monitoring/numerical simulation分类
矿业与冶金引用本文复制引用
陈佳耀,史秀志,周健,邱贤阳,王洋..干堆排尾对露天坑坑下采场稳定性的影响[J].中南大学学报（自然科学版）,2017,48(10):2723-2731,9.基金项目
国家重点研发项目(2017YFC0602902)(Project (2017YFC0602902) supported by the National Key Research and Development Program of China) （2017YFC0602902）
