摘要
以某矿5#大倾角特厚煤层区段煤柱留设为工程背景,基于极限平衡理论和广义米塞斯准则理论计算得到煤层倾角为35°时区段煤柱宽度,得出留设区段煤柱25.6 m左右。运用FLAC3D数值模拟了不同煤柱宽度时巷道围岩应力和塑性区分布特征,模拟结果表明留设区段煤柱宽度在25m较合理。
Taking section coal pillars in No. 5 steep thick coal seam as the engineering back- ground, based on Limit Equilibrium Theory and Extended Mises Yield Criterion Theory, the width of the section coal pillar was calculated to be about 25.6 meters at the inclination angle of 35° FLAC3D software was used to simulate the distribution of the surrounding rock stress and plastic zones of coal pillars with different width. The simulation result showed the reasonable width to be 25 meters.
作者
任重先
REN Zhongxian(Jingfang Coal Co. ,Ltd. , Shanxi Coal International Energy Group ,Changzhi 046000, Chin)
出处
《山西煤炭》
2017年第3期23-26,共4页
Shanxi Coal
关键词
大倾角特厚煤层
区段煤柱
极限平衡理论
数值模拟
, steep thick coal seam
section coal pillar
Limit Equilibrium Theory
numerical simulation
