煤矿安全2019，Vol.50Issue(1)：170-174,5.DOI:10.13347/j.cnki.mkaq.2019.01.042
深埋大跨度复合顶板煤巷失稳机理及控制技术
Mechanism of Instability and Control Technology of Deep－buried Large－span Coal Roadway Under Composite Roof
摘要
Abstract
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.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Key words
large-span roadway/composite roof/anchor bolt(cable)support/pressure arch theory/surrounding rock control分类
矿业与冶金引用本文复制引用
轩召军,常庆粮,施现院,王恒,李向阳..深埋大跨度复合顶板煤巷失稳机理及控制技术[J].煤矿安全,2019,50(1):170-174,5.基金项目
中国地质调查局地质调查资助项目(12120114020201-05) （12120114020201-05）
贵州省科技重大专项资助项目([2014]6002号) （[2014]6002号）
