孤岛工作面大跨度切眼施工及围岩控制技术研究  

Research on construction and surrounding rock control technology for long-span roadway in island working face

作　　者：陈品华 CHEN Pinhua(Shanxi Tiandi Wangpo Coal Co.,Ltd.,Jincheng 048000,China)

机构地区：[1]山西天地王坡煤业有限公司,山西晋城048000

出　　处：《煤矿现代化》2025年第3期17-21,共5页Coal Mine Modernization

摘　　要：为解决厚煤层大跨度切眼施工速度慢、支护难度大、易发生冒顶事故的问题,以王坡煤业3206工作面切眼为研究对象,采用理论分析和现场实测的研究方法,对厚煤层大跨度切眼围岩变形及控制技术进行研究。基于普氏冒落拱理论和极限平衡理论计算得出工作面切眼冒落拱高度为2.77 m,两帮塑性破坏区宽度为2.11 m,指出大跨度切眼中部拉应力集中和顶板锚杆长度小于冒落拱高度是导致顶板下沉量大甚至发生冒顶事故的主要原因。采用二次成巷施工技术和顶板“长短锚索+钢筋梯子梁+钢筋网”支护,并采用“单体液压支柱+π型梁+木垛”进行补强支护的围岩控制技术,确保了工作面切眼快速施工并有效控制了其围岩变形。In order to solve the problems of slow construction speed,high support difficulty,and easy occurrence of roof caving accidents in large-span cutting of thick coal seams,the 3206 working face cutting of a certain mine is taken as the research object.Theoretical analysis and on-site measurement research methods are used to study the deformation and control technology of the surrounding rock of large-span cutting of thick coal seams.Based on the Pugh's collapse arch theory and limit equilibrium theory,the height of the collapse arch at the cut hole of the working face is calculated to be 2.77 m,and the width of the plastic failure zone on both sides is 2.11 m.It is pointed out that the concentration of tensile stress in the large-span cut hole and the length of the roof anchor rod being less than the height of the collapse arch are the main reasons for the large amount of roof subsidence and even roof collapse accidents.The use of secondary tunneling construction technology and roof"long and short anchor cables+steel ladder beams+steel mesh"support,as well as the use of"single hydraulic pillar+π-shaped beam+wooden crib"reinforcement support for surrounding rock control technology,ensured the rapid construction of the working face cut and effectively controlled its surrounding rock deformation,laying the foundation for the installation of mining equipment and rapid production in the working face.

关 键 词：厚煤层 大跨度切眼 二次成巷 围岩控制 

分 类 号：TD353[矿业工程—矿井建设]