采矿与安全工程学报2015，Vol.32Issue(6)：978-983,988,7.DOI:10.13545/j.cnki.jmse.2015.06.018
大跨度巷道顶板垮冒规律与减跨支护技术研究
Roof collapse laws and reducing-span support technology in long-span roadway
摘要
Abstract
In response to the support problem under high stress in long-span roadway, taking the 7801 open-off cut in Wuyang mine as the engineering case, the microfracture development, stress distribution and deformation, failure and collapse laws have been researched in surrounding rock of long-span roadway under different side pressure coefficient and buried depths. The reducing-span support tech-nology consisting of "reasonable section shape of secondary tunneling, bolt-mesh-cable, steel strip and hydraulic single prop" has been put forward. In the meanwhile, the long-span support parameters of open-off cut have been improved. The research shows that the original support scheme can not effec-tively control the deformation of roadway surrounding rock when the buried depth of 7801 open-off cut is more than 600 m; while the new reducing-span support technology can effectively control the defor-mation of surrounding rock, when the maximum for the roof-to-floor convergence, rib-to-rib conver-gence, roof separation and working resistance of single prop all in control are 55.5 mm,25.1 mm,24.8 mm and 12.52 MPa respectively. The researches effectively solve the support problem of 7801 open-off cut in Wuyang mine and provide reference for support design of long-span roadway.关键词
大跨度巷道/顶板垮冒规律/减跨支护/双微拱断面Key words
long-span roadway/roof collapse laws/reducing-span support/double flat arched section分类
矿业与冶金引用本文复制引用
李冲,曹悦,程争民,徐金海,陈梁..大跨度巷道顶板垮冒规律与减跨支护技术研究[J].采矿与安全工程学报,2015,32(6):978-983,988,7.基金项目
国家自然科学青年基金项目(51304200) （51304200）
中国博士后科学基金项目(2013M540477) （2013M540477）
中国博士后特别资助基金项目(2014T70560) （2014T70560）
江苏高校优势学科建设工程资助项目 （）
煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM11X02) （SKLCRSM11X02）
