摘要
针对综放工作面区段小煤柱留设后,沿空巷道变形严重问题,提出采用注浆加固小煤柱方案,通过数值模拟对注浆与未注浆情况下,煤柱内部核区及围岩塑性区变化进行对比,表明注浆加固可增加煤柱内部核区宽度。10m小煤柱注浆加固工业性试验结果表明,注浆加固后小煤柱强度得到提高,巷道两帮移近量得到有效控制,实现了沿空巷道围岩稳定。
After the small coal pillar in the sublevel caving working face is set up, with the serious deformation of the roadway along the Goaf,the paper puts forward a scheme of grouting to reinforce the small coal pillar, and compares the plastic zone of the coal pillar and the surrounding rock by numerical simulation to show that the grouting reinforcement can increase the inner core zone width of the coal pillar. The experimental results of 10 m small coal pillar grouting reinforcement show that the strength of small coal pillar has been improved after grouting reinforcement, and the two displacement of roadway have been effectively controlled and the surrounding rock stability of the roadway along the GOAF has been realized.
作者
乔越
QIAO Yue(Shanxi Hongsha No.1 Construction Company Limited , Shanxi Yangquan 045008)
出处
《煤矿现代化》
2019年第4期12-14,18,共4页
Coal Mine Modernization
关键词
综放面
小煤柱
注浆加固
围岩稳定
fully mechanized caving face
small coal pillar
grouting reinforcement
surrounding rock stability
