摘要
为有效提升某煤矿深部软岩巷道的围岩控制质量,开展深部岩巷精准介入围岩结构支护技术的实践应用。通过分析深部岩巷变形特征与影响因素,确定该巷道内变形失稳的主要因素有巷道围岩强度较弱、巷道埋深较大及支护方式不合理等,明确支护技术方案应以提升巷道围岩粘聚力、加强整体巷道岩石内角摩擦度为基础。实践结果表明,巷道顶板下沉量在支护工序完成后的初期呈现逐渐增大的趋势,并在增长至36 mm的情况下逐渐稳定;巷道两帮的位移程度也呈现出先增大后平稳的趋势,其移近量在逐渐上升至67 mm时趋于稳定;2个月内并未发现显著的围岩表面变形情况,案例巷道的顶板下沉量以及两帮移近量都呈现出了逐渐上升后趋于稳定的情况。
In order to effectively boost the quality of surrounding rock control in the deep soft rock roadway of a coal mine,this paper uses case analysis and field investigation method to study the support technology of precise intervention in the surrounding rock structure of deep rock roadway.First,the deformation characteristics and influential factors of deep rock roadway are analyzed to determine the main factors of deformation and instability in the roadway include weak strength of surrounding rock,large buried depth of roadway and problems in support mode.Secondly,the technical scheme of stable support is determined.Finally,the support scheme design for the roadway engineering in this case should be based on improving the cohesion of surrounding rock and strengthening the overall angular friction of roadway rock.The research results show that the subsidence of roadway roof gradually increases in the initial stage after the completion of the supporting process,and gradually stabilizes when it increases to 36 mm.The displacement degree of the two sides of the roadway also showed a trend of increasing at first and then stable,and its proximity gradually increased to 67 mm.No significant surface deformation of surrounding rock was found during the period of two months,and the roof subsidence and the movement of two sides of the roadway in the case showed a gradual increase and then tended to be stable.
作者
胡俊峰
肖宁
HU Junfeng;XIAO Ning(Shaanxi Shanmei Hancheng Mining Co.,Ltd.,Weinan 715400,China;Sangshuping Coal Mine,Shaanxi Shanmei Hancheng Mining Co.,Ltd.,Weinan 715407,China)
出处
《陕西煤炭》
2024年第10期175-178,共4页
Shaanxi Coal
关键词
深部岩巷
围岩结构
支护技术
顶板下沉量
两帮移近量
deep rock roadway
surrounding rock structure
support technology
roof subsidence
two-side proximity
