摘要
亚美大宁煤矿3503巷道在305综采工作面回采期间受采动应力影响,出现顶板受压变形、锚杆锚索失效、局部冒顶等现象,围岩稳定性受到严重破坏,对生产安全造成影响。本文通过超前注浆加固技术,在巷道拱顶、两帮的位置进行注浆加固,使浆液充填岩石空隙,将其凝固成一体,达到减少巷道变形量、提升围岩整体强度的目的。注浆前煤体强度为8.85MPa,注浆后煤体强度12.79 MPa。注浆前后煤体强度增加值为3.94 MPa,增加比例为44.52%。综采工作面推进到注浆区域时,巷道未发生片帮、冒顶现象,且巷道两帮位移量在154~571 mm,顶板下沉量在215~400 mm,底鼓量在371~700 mm,巷道注浆后变形量始终在可控范围内,巷道固化效果明显。
No.3503 roadway of Yamei Daning Mine was affected by mining stress during the mining period of No.305 fully mechanized mining face,and there were phenomena such as roof compression deformation,failure of bolt and anchor cable,and local roof fall.The stability of surrounding rock was seriously damaged,which affected the safety of production.Through the advanced grouting reinforcement technology,grouting reinforcement was carried out at the position of the arch and two sides of the roadway,so that the slurry filled the rock gap and solidifies it into one,so as to reduce the deformation of the roadway and improve the overall strength of the surrounding rock.The strength of coal before grouting was 8.85 MPa,and the strength of coal after grouting was 12.79 MPa.The increase of coal strength before and after grouting was 3.94 MPa,and the increase ratio was 44.52%.When the fully mechanized mining face was advanced to the grouting area,there was no spalling and roof fall in the roadway,and the displacement of the two sides of the roadway was 154~571 mm,the roof subsidence was 215~400 mm,and the floor heave was 371~700 mm.The deformation of the roadway after grouting was always within the controllable range,and the curing effect of the roadway was obvious.
作者
王跃华
石晋松
韩凯
姜汉
刘世奇
张洪伟
郭懂宇
贾哲哲
Wang Yuehua;Shi Jinsong;Han Kai;Jiang Han;Liu Shiqi;Zhang Hongwei;Guo Dongyu;Jia Zhezhe(Shanxi Yamei Daning Energy Co.,Ltd.,Jincheng 048000;China University of Mining and Technology(Beijing),School of Energy and Mining Industry,Beijing 100083,China)
出处
《煤炭与化工》
CAS
2023年第9期16-19,24,共5页
Coal and Chemical Industry
基金
中央高校基本科研业务费专项资金资助项目(2022YQNY02,2022YQNY04)
河北省重点研发计划(22375422D)。
关键词
采动应力
超前注浆
围岩稳定
巷道变形
mining stress
advance grouting
surrounding rock stability
roadway deformation
