煤矿安全2019，Vol.50Issue(7)：249-253,5.DOI:10.13347/j.cnki.mkaq.2019.07.059
近距离煤层开采巷道布置合理性分析
Analysis on Rationality of Roadway Layout in Close Coal Seam Mining
摘要
Abstract
Aiming at the unstable roof of 8220 machine roadway in 7220 face of Jiegou Coal Mine, the width of plastic zone on one side of coal pillar and the stress distribution law of upper coal seam floor are studied by using limit equilibrium theory and elasticity mechanics theory. The results show that the width of plastic zone on one side of 7#coal pillar is 21.1 m. After mining of the upper coal seam, the stress balance state of the original rock is broken, and the stress concentration area and pressure relief area appear near the coal wall. The maximum damage depth hmax of floor is 15.91 m, the maximum damage depth of floor is 7.41 m from the horizontal distance of coal wall and 84.3 m from the horizontal direction of floor damage area of goaf. According to the relative position of the left coal wall of the goaf in 7# coal seam and the central line of the roof of the mining roadway in 8# coal seam, four sets of layout schemes are proposed. Through comprehensive analysis, when the distance between the coal wall and the central line of the roof of the mining roadway is 22 m, the stress of the mining roadway is small and even, the distribution of the plastic zone is small, and the deformation of the surrounding rock is also small.关键词
工作面机巷/极限平衡理论/弹性力学/塑性区宽度/布置方案Key words
machine roadway of working face/limit equilibrium theory/elastic mechanics/plastic zone width/layout scheme分类
矿业与冶金引用本文复制引用
梁华杰,顾天州,赵忠义..近距离煤层开采巷道布置合理性分析[J].煤矿安全,2019,50(7):249-253,5.基金项目
贵州省科技厅技术基金资助项目(黔科合LH字[2014] 7470号) （黔科合LH字[2014] 7470号）
贵州省教育厅基金资助项目(黔教合 KY字[2017]266号) （黔教合 KY字[2017]266号）
