摘要
为了研究深埋大跨度复合顶板煤巷变形失稳机理及支护技术,以某矿2614改造下巷为工程背景,采用压力拱理论和数值模拟技术对巷道围岩变形规律进行了分析,设计了"锚杆(索)+金属网+M钢带+单体支柱"的支护方案,并开展了工业试验。结果表明,大跨度复合顶板巷道围岩失稳破坏分为分层剪切、挠曲离层、拉断破裂和垮落成拱4个阶段,巷道垮落拱高为2.5～3.8m,围岩变形量小于100 mm,锚杆和锚索拉力分别小于60 kN和350 kN,单体支柱压力小于13MPa,支护效果较好。
To study the instability mechanism and supporting technology of deep-buried long-span coal roadway under composite roof, take the reconstructive transportation roadway of 2614 workface in a mine as a case study, the deformation law of roadway surrounding rock was analyzed by the theory of pressure arch and numerical simulation. The support scheme of "bolt(cable) +metal mesh +M steel belt + monomer pillar"was designed, and industrial experiments were carried out on site. The results show that the failure of the surrounding rock of long-span roadway under composite roof is composed of four stages: shear stratification,delamination, rupture and arching. The arc height of the roadway is 2.5 m to 3.8 m, the deformation of surrounding rock is less than 100 mm, and the anchor and cable tension are less than 60 kN and 350 kN, respectively. Besides, the pressure of the single hydraulic prop is less than 13 MPa, and the support effect is better.
作者
轩召军
常庆粮
施现院
王恒
李向阳
XUAN Zhaojun;CHANG Qingliang;SHI Xianyuan;WANG Heng;LI Xiangyang(Shandong Xuchang Mining Group Co.,Ltd.,Jining 272000,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China;Post-doctoral Mobile Stations,Shandong Energy Zibo Mining Group Co.,Ltd.,Zibo 255000, China;Shandong Energy Zibo Mining Group Co.,Ltd.,Zibo 255000,China;Daizhuang Mine of Shandong Energy Zibo Mining Group Co.,Ltd.,Jining 272100,China)
出处
《煤矿安全》
CAS
北大核心
2019年第1期170-174,共5页
Safety in Coal Mines
基金
山东省泰山学者专项经费资助项目(201309)
关键词
大跨度巷道
复合顶板
锚杆(索)支护
压力拱理论
围岩控制
large-span roadway
composite roof
anchor bolt (cable)support
pressure arch theory
surrounding rock control
作者简介
轩召军(1984-),男,山东济宁人,工程师,工学学士,从事矿井安全与生产技术的研究与管理工作。
