Analysis of Creep Characteristics of Shallow Mined-out Areas Roof under Low Stress Conditions
Under low stress conditions, when the load exerting on the mined-out areas roof is less than the rock long-term strength, the rock roof will generate some creep deformation, hi order to prevent the roof of the mined-out areas suddenly collapse, and to ensure the operator and construction equipment above the mined-out areas safety, it is an important security technical problem to reveal the creep characteristics of the shallow mined-out areas roof. Taking the mined-out areas of Antaibao Surface Mine as background, considering the Theological properties of rock roof, and assuming the roof was a rectangular thick plate, the creep characteristics of mined-out areas roof were analysed by applying the thick plate theory and Kelvin creep model. The regression equation of the roof deflection increment overtime was given, and the creep characteristics of the shallow mined-out areas roof were revealed also. The above results can provide a theoretical basis to ensure the surface mine safety construction, which has some reference to similar engineering.
Surface mine Mined-out areas Thick plate theory Creep effect Deflection
Shu Ren Wang Hui Hui Jia
School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, China Department of Architecture Engineering, Chengde petroleum college, Chengde, China
国际会议
上海
英文
832-836
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）