摘要
运用数值模拟方法,对不同开采参数下煤柱的塑性区、竖向位移及应力分布进行了系统研究。研究表明,煤柱的破坏是由剪切造成的,在煤柱的帮角位置存在应力集中现象,煤柱尺寸留设合理时,其中间存在弹性区,能够支撑顶板。目前泰丰煤矿的煤柱尺寸留设过大,适当减少尺寸是合理的。
Numerical simulation is applied to researching plastic zone, vertical displacement and stress distribution of coal pillar under different mining parameters in this paper. Results are shown as follow. Pillar damage is contributed to shear and stress concentration occurs at comers of pillar. Elastic zone in pillar can sustain roof if pillar dimension is rational. Current pillar dimension should be reduced in Taifeng Colliery.
出处
《煤矿开采》
2008年第6期17-19,共3页
Coal Mining Technology
关键词
房柱式开采
煤柱稳定性
数值模拟
煤柱尺寸
浅埋煤层
room-pillar mining
coal pillar stability
numerical simulation
pillar dimension
shallow buried coal seam
