摘要
针对近距离煤层遗留煤柱下伏回采巷道围岩变形大、不易控制等难题,以某矿地层条件为研究背景,建立力学模型,研究了上覆煤层开采后遗留煤柱下伏煤岩层中水平和竖直方向的应力集中系数,研究了煤岩体受遗留煤柱影响后的围岩强度系数分布规律,揭示了遗留煤柱对下伏近距煤层围岩稳定性的影响。
Aiming at such question that it is hard to control the large deformation of roadway surrounding rock which underlie legacy coal pillar in close coal seam, taking the geological conditions of a coal mine as the engineering background, and in combination with corresponding mechanics model, the concentration coefficient of horizontal and vertical direction in underlying strata of overlying coal pillar is studied, and the strength coefficient distribution of surrounding rock is discussed as well, which reveals the stability of surrounding rock effected by the overlying pillar.
出处
《煤炭技术》
北大核心
2017年第7期23-25,共3页
Coal Technology
基金
贵州省科学技术厅科学技术联合基金项目(贵科合LH字[2016]7107)
贵州省教育厅青年科技人才成长项目(黔教合KY字[2015]427
黔教合KY字[2016]227)
关键词
近距煤层
遗留煤柱
应力影响
强度系数
close coal seam
legacy coal pillar
stress influence
strength coefficient
