摘要
长沟峪矿-140m水平东一石门是开采-230^-310m水平4槽煤柱的惟一通道,通过数值模拟手段分析了4槽煤柱终采线"移动"后围岩的等效应力场,得到了沿-140m水平石门的等效应力和位移的变化曲线,分析了-140水平石门保护煤柱合理尺寸。
East-1 cross-cut at -140m level in Changgouyu Colliery is the only passage of mining 4th coal pillar between -230m ～- 310m. This paper analyzes equivalent stress field of surrounding rock after end-mining line moves by numerical simulation and obtains curves of cross-cut＇s equivalent stress and displacement along -140m level. It also analyzes reasonable dimension of protective pillar for cross-cut at -140m level.
出处
《煤矿开采》
北大核心
2009年第5期7-9,61,共4页
Coal Mining Technology
基金
国家自然科学基金重大项目(50490275)
关键词
急倾斜煤层
煤柱
终采线
数值模拟
steeply inclined coal seam
coal pillar
end-mining line
numerical simulation
