摘要
采用钻孔窥视测试和理论分析相结合的手段分析了魏家地煤矿二号石门的破坏规律,得到二号石门围岩稳定的主要因素包括高应力、软弱围岩、断层、埋深和采动的影响。给出了二号石门包含的全岩、上岩下煤、全煤及上煤下岩等4个特征段的破坏规律。提出了留设柔垫层让压联合返修支护技术。现场应用表明:返修后巷道的变形控制始终在允许范围内,返修支护技术是合理的。
Failure law of No.2 crosscut was analyzed by theoretical analysis and in-situ test with borehole camera.The stability factors of No.2 crosscut repair section was affected by high stress,soft rock,geological structure,etc.Failure laws of four feature sections were obtained that they were whole＇rock area,upper-rock and nether-coal area,whole-coal area,upper-coal and nether-rock area.The combined repair schemes of pressure relief technology with reserved flexible cushion support were defined.Field studies showed that deformation was controlled in allowed scope and repair support technology was reasonable.
出处
《西安科技大学学报》
CAS
北大核心
2011年第3期281-286,共6页
Journal of Xi’an University of Science and Technology
基金
陕西省教育厅科研计划资助项目资助(2010JK667)
高等学校博士学科点专项科研基金资助(20096121110004)
关键词
煤矿深部巷道
破坏规律
锚网索
锚注
留设柔垫层让压技术
deep coal mine roadway
failure law
bolt-mesh-anchor
bolt-grouting
pressure relief technology with reserved flexible cushion
