煤柱底板压力系数计算及巷道位置研究  

Calculation on the Pressure Coefficient of Pillar Floor and Research on Drift Position

作　　者：刘新杰[1] 张通[1] 李小萌[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《矿业研究与开发》2015年第1期25-29,共5页Mining Research and Development

基　　金：国家重点基础研究发展计划(973计划)资助项目(2013CB227903);国家自然科学基金煤炭联合基金重点项目(U1361209)

摘　　要：根据煤柱载荷的受力方式,分析了不同煤柱宽度下底板应力场的传播分布形式。结合UDEC数值模拟分析了煤层一侧开采和20m煤柱下的应力系数分布情况,对比分析了不同压力系数位置开挖巷道前后的应力变化。结果表明,煤柱压力传递角介于-50°~18°;煤柱底板压力系数与底板距离基本成线性关系,随距离增加而不断衰减,同时煤柱底板的影响深度与煤柱的倍数深度呈三次多项式递减;煤柱底板压力系数的拟合关系式简洁、精度高,可方便计算煤柱下任一点的压力系数,为巷道位置和支护方式的选择提供了一定的指导依据。According to force ways of coal pillar,the transmission forms of floor stress field with different widths were analyzed.Combining with UDEC numerical simulation,the stress coefficient distribution under mining one-side coal and20 mcoal pillar was analyzed,and stress variation in different positions before and after mining was compared.The results showed that the transmission angle of pillar pressure was between-50°to 18°.The stress coefficient of pillar floor had a linear relationship with the floor distance,and decreased continuously with the increase of distance.Meanwhile,the influenced depth decreased with the multiple depths as cubic polynomial.The fitting equation of stress coefficient with high precision was concise and could easily calculate the stress coefficient at any point of the pillar,which provided certain reference for the selection of drift position and support method.

关 键 词：煤柱 巷道位置 传递角 压力系数 

分 类 号：TD322[矿业工程—矿井建设]