摘要
针对色连二矿的地质条件,利用极限平衡理论、数值模拟及现场实践等方法,分析了122(中)05综采工作面煤体极限平衡区宽度及不同煤柱尺寸时柱体垂直应力、最大主应力的大小、分布情况,从而确定留设煤柱宽度12.0 m。实测结果表明,该煤柱尺寸改善了围岩受力状态,有效控制了巷道顶底板及两帮变形,为同类条件下煤柱留设提供了技术参考。
According to geological conditions of Selian second coal mine, methods of limit equilibrium theory, numerical simulation and field practice were used to analyze limit equilibrium section width of coal and vertical stress, the maximum principal stress and distribution of the columns at different coal pillar sizes, which determined reserved width of coal pillar was 12.0m. The measured results showed that stress state of surrounding rock was improved by size of coal pillar, top and bottom of roadway and deformation of two groups were controlled effectively, which provided technical reference for coal pillar preserve in similar conditions.
出处
《煤炭与化工》
CAS
2017年第8期1-5,共5页
Coal and Chemical Industry
关键词
煤柱宽度
数值模拟
应力
极限平衡理论
coal pillar width
numerical simulation
stress
limit equilibrium theory
