摘要
针对条带开采覆岩内部的移动变形机理的问题,采用离散元数值分析研究条带开采覆岩内部的移动变形特征。研究结果表明:条带开采覆岩内部下沉呈现"三带"发展规律,由下往上依次为压缩带、平稳带、弱化带;证实地表下沉主要由条带采空区压力拱两侧伴有附加应力的顶底板煤岩柱自我压缩依次累积而成;表土层起到消化吸收地表移动变形作用;表土层越厚、表土层内部消化吸收的相对变形量越大。
Based on inner movement deformation mechanism in strip mining, discrete element numerical analysis was adopted to study the problem above. The result showed that strip mining overlying strata subsidence with sequence as compressed belt, smooth belt, weaken belt, the ground subsidence was caused by accumulation self compression of roof and floor of coal and rock pillars in strip goaf pressure subsidiary stress, the surface layer balanced the ground movement deformation, the thicker the surface layer, the larger relative deformation of surface layer balanced.
出处
《煤炭与化工》
CAS
2016年第5期103-105,108,共4页
Coal and Chemical Industry
关键词
条带开采
地表沉陷
压力拱
关键层
strip mining
ground subsidence
pressure arch
key stratum