摘要
为解决大采高工作面窄煤柱留设的合理宽度,以亭南煤矿650m采深大采高工作面为研究对象,通过现场实测得到了该矿6m开采高度的煤柱破坏区域,钻孔测压显示:大采高工作面的煤柱具有破碎区、支撑区和保护区的特点,并基于BMP破坏准则,计算了煤柱弹性核区的极限宽度(即支撑区)为4.86m,运用FLAC3D数值模拟的方法,分别对4种不同宽度的煤柱进行分析,最终得出12m宽度的煤柱可以满足井下的安全生产;12m煤柱在应用过程中,206工作面压力减少,巷道移近量不大,风量没有明显地减少。研究结果表明窄煤柱可以满足深井大采高工作面的安全生产。
In order to design rational shallow coal-pillar width of large-mining-height face , by field testing , coal-pillar damage area was obtained in 6m height mining face of Tingnan Colliery whose mining height reached 650m.Bore-hole observation showed that the coal pillar could be divided into cracked zone , sustaining zone and protective zone .Based on BMP failure criterion , limit width of core elastic zone （that was, sustaining zone） was calculated to be 4.86m.Applying FLAC3D numerical simulation method, 4 widthes coal-pillars were analyzed.It was found that 12m width could ensure safety.In field application, underground pressure roadway deformation of 206 mining face was small and airflow was not obviously reduced .The results showed that shallow coalp-illar could meet the safety re -quirement of large-mining-height face .
出处
《煤矿开采》
北大核心
2015年第3期28-30,42,共4页
Coal Mining Technology
基金
2015年内蒙古自治区高等学校科学研究项目(NJ2Y249)
关键词
深井
大采高工作面
窄煤柱
破碎区
数值模拟
deep mine
large-mining-height face
shallow coal -pillar
cracked zone
numerical simulation
