Roof Rupture Analysis of Stope Drift in Soft Thick Seam with a Large Angle
Described stope drifts roof rupture characteristics in soft thick seam with a large angle.With knowledge of structural mechanics, mechanical analysis of the roof found that the lower side of the roof area bear the largest moment and probably to be the starting point of the roof rupture; the support force change of the lower side coal face has a significant influence on the roof stress state. Software simulation of tunnel deformation and failure characteristics using FALC3D shows that both area and extent of roof damage of the lower side is much greater than that of the higher side; both sides’ support to the roof plays an important role, large deformation of either side is the main induced factor of roof rupture especially the lower sides; to expand the drift has obvious disturbance on the roof, which will lead to the recurrence of plastic roof damage. Analyses the actual roof damage induced factors according to the actual situation on-site: soft coal, serious expansion and undercover, water spray, geological structure, poor quality of construction and mining impact and put forward corresponding countermeasures.
Guo Dong-ming Yang Ren-shu Wang Guo-dong Zhu Xian-lei Han Peng-fei Zhu Yan-li
State Key Laboratory for Geomechanics & Deep Underground Engineering State Key Laboratory for Geomechanics & Deep Underground Engineering School of Mechanics and Civil e School of Mechanics and Civil engineering in China University of Mining and Technology Beijing, Chin
国际会议
International Mining Forum 2010(2010年国际采矿论坛 IMF 2010)
合肥
英文
100-105
2010-09-20（万方平台首次上网日期，不代表论文的发表时间）