摘要
为优化区段煤柱宽度,提高资源采出率,采用现场实测、理论计算和数值模拟方法对保德矿合理区段煤柱宽度进行了研究。通过分析区段煤柱在采动条件下,其垂直应力的分布,确定了煤柱稳定性的条件。通过FLAC3D数值模拟软件模拟不同宽度的预留煤柱,确定工作面前方超前支承压力和侧向支承压力的峰值位置及具体数值。采用松动圈理论获得了巷道两帮松动圈的范围。最后利用极限平衡理论确定了保德矿88109与88110工作面区段煤柱合理宽度应为25m。
In order to optimize width of the sectional coal pillar and improve the resources recovery,filed test,theoretical calculation and numerical simulation are applied to study the width of sectional coal pillar in Baode coal mine.The condition of coal pillar stability is determined through analysis of vertical stress distribution on coal pillar under the condition of one side mining.The position and specific values of peak advance abutment pressure and peak lateral abutment pressure are determined for in the front of working,using FLAC3 Dto simulate the reserved coal pillar with different width.The two sides of roadway loose range is obtained based on loose circle theory.According to the ultimate balanced theoretical calculation and the numerical simulation results,the rational width of sectional coal pillar in Baode mine should be 25 m.
出处
《煤炭工程》
北大核心
2016年第S1期12-15,共4页
Coal Engineering
关键词
区段煤柱
煤柱宽度
煤柱应力
数值模拟
sectional coal pillar
width of coal pillar
coal pillar stress
numerical simulation
