摘要
以采空区留矿柱采矿为背景,建立采空区矿柱–顶板体系流变力学模型,得出矿柱支撑下采空区顶板受流变作用位移控制方程,依此对采空区顶板破坏的不同阶段进行分析讨论。研究表明,考虑矿岩流变性的情况,采空区顶板岩层将随时间逐渐破坏直至坍塌。通过案例分析,所建立的考虑矿柱流变特性的采空区矿柱–顶板体系力学模型,可以对采空区稳定时间进行估计。
Based on the mining with pillar supporting in the mined-out area, a rheological mechanical model of pillars and roof plate system for mined-out area is established, which brings out the displacement control function of the roof stratum supported by pillars under rheological effect; and the fracture stages in roof stratum are analyzed regarding to the time-dependent behavior. The result indicates that the roof stratum supported by pillars in the mined-out area will gradually fail and till collapse by taking into account of the rheological feature of pillars. Based on a case study, the proposed mechanical model could be used to estimate the stable time of the roof stratum in pillar-roof system of mined-out area by considering the rheological behavior of pillars.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2010年第3期577-582,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家高技术研究发展计划(863)项目(2008AA062104)
国家重点基础研究发展计划(973)项目(2010CB731500)
关键词
采矿工程
采空区
蠕变
伯格斯体
塌陷
mining engineering
mined-out area
creep
Burgers body
collapse
