摘要
针对顶煤破坏区下巷道围岩破碎,导致扩帮困难等问题,以韩咀煤业32101工作面开切眼为研究对象,分析了顶煤破坏区扩帮巷道失稳机理;提出了顶板预注浆围岩控制技术,在形成止浆帷幕基础上,然后通过注浆构建再生顶板。通过数值模拟进行加固效果校验,结果表明注浆后巷道塑性区范围显著减小;现场应用结果表明:采用顶板预注浆加固措施后,32101工作面切眼围岩变形量较小,围岩加固效果良好。
Aiming at solving the difficulties in sideway expansion attributed to the broken wall rock in roadways under the top coal damage area,we took the open-off cut at No.32101 working face in Hanzui Coal Industry as the research object.By analyzing the destabilizing mechanism of side wall expansion in the top-coal damage area,roof pre-grouting control technology for the surrounding rock was proposed.A regenerated roof was then constructed through grouting based on the formation of a grout-resisting curtain.The reinforcement effect was verified through numerical simulation,and the results showed that the plastic zone range of the roadway was significantly reduced after grouting.Field application results indicates that after the roof pre-grouting reinforcement,the surrounding rock deformation in the open-off cut at No.32101 working face was small,and the reinforcement effect was good.
作者
乔志
孙华清
韩立军
QIAO Zhi;SUN Huaqing;HAN Lijun(China Coal Huajin Group Hanzui Coal Industry Co.,Ltd.,Linfen 042100,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China)
出处
《煤炭工程》
北大核心
2024年第6期61-65,共5页
Coal Engineering
关键词
顶煤破坏区
超前预注浆
巷道扩刷
围岩控制
顶板控制
top-coal damage zones
advance pre-grouting
brush expansion
surrounding rock control
roof control
