残留煤柱破坏特征及其对下部煤层开采影响  

Failure Characteristic of Residual Coal Pillar and Its Influence on Downward Mining

作　　者：朱涛[1,2] 宋敏[3] 康立勋[1] 卓庆奉 崔永丰[5] 

机构地区：[1]太原理工大学矿业工程学院,山西太原030024 [2]内蒙古准格尔旗蒙南煤炭有限责任公司,内蒙古准格尔010400 [3]山东水利职业学院建筑工程系,山东日照276826 [4]鄂尔多斯职业学院矿业系,内蒙古鄂尔多斯017000 [5]煤炭科学研究总院开采设计研究分院,北京100013

出　　处：《煤矿开采》2009年第5期13-15,49,共4页Coal Mining Technology

基　　金：国家自然科学基金资助项目(50704024)

摘　　要：应用Wilson煤柱设计理论公式和三向应力状态下的极限平衡条件,以王封煤矿为实例,分析了刀柱采煤法开采后留设煤柱的弹塑性变形区,计算了煤柱承受的极限载荷,得出该矿8号煤层刀柱采煤法留设的煤柱实际承受的荷载小于其所能承受的极限荷载,煤柱处于稳定状态,上覆岩层在煤柱上产生应力集中现象,对下部煤层开采造成较大的困难。Taking Wangfeng Colliery as an example, this paper applied Wilson coal pillar design method and limit equilibrium condition to analyzing elastic-plastic deformation area of residual coal pillar after mining with wedge pillar method and calculating limit loading on coal pillar. Result shows that actual loading on pillars in 8th Coal Seam is smaller than limit value and pillars are stable. Stress concentration due to overlying strata weight on pillar will make downward coal seam mining difficult.

关 键 词：残留煤柱 破坏特征 下部煤层 

分 类 号：TD823.81[矿业工程—煤矿开采]