Numerical Research on Top Coal Movement, Failure Mechanism and SupportsStresses Characters of Fully Mechanized Top-Coal Caving in Steep Thick Seam
The fully mechanized top-coal caving in steep thick seam is a nonlinear mechanics process with many influence factors and complicated deformation and failure features of coal and rock mass. It takes a broken linetype caving face of Jingyuan coal mine as engineering background, which has both features of level mining and inclined mining. Based on UDEC2D distinct element computation program, the movement regularities and the characters of stress field and plastic zones of top coal and overburden rock were studied. And based on FLAC3D finite difference computation program, the stress characters and the movement tendency of supports arranged along broken linetype caving face were analyzed. Variation of the maximum principal stress of top coal, subsidence characters of overburden rock of mining area, failure condition of coal under supporting pressure and the stresses of supports were studied and analyzed, which is of important theoretical meaning to the practice in similar engineering.
steep thick coal seam fully mechanized top-coal caving movement regularity of coal and rock mass failure mechanism
MIAO Shengjun WANG Shuren LI Yuan
School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao 066004, Hebei, China
国际会议
The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)
杭州
英文
1627-1631
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）