松散岩体在采空区内应力状态的数值模拟研究  

Numeric Simulation Study of Friable Rock Mass Stress State in the Goaf

作　　者：冯英华[1] 胡强国[1] 周志燕[1] 高丽[2] 郑亚强[1] 

机构地区：[1]淮南联合大学基础部,安徽淮南232001 [2]淮南联合大学机电系,安徽淮南232001

出　　处：《淮南职业技术学院学报》2006年第1期36-39,共4页Journal of Huainan Vocational Technical College

摘　　要：针对采空区内的松散岩体,运用三维有限差分法建立了数值模型对其进行分析;研究结果表明,在不同埋深条件下松散岩体的应力呈直线变化;对于水平应力,其斜率间的关系近似成指数关系;对于垂直应力,随埋深增大斜率没有变化;在不同冒落高度条件下,松散岩体的水平应力变化成多项式,次数随冒落高度依次升高;垂直应力变化曲线随冒落高度由直线逐渐变成对数曲线;在压实松散岩体过程中,应力在初始循环时步变化大;不同冒落高度条件下,循环时步随高度增大。To friable rock mass in the goaf, numeric model using the 3 - D finite difference method is established to analyze it. Studying the result showed as follow： in the different buried depth, the stress of friable rock mass assume line change. To level stress, the relation of their slope approximatively shows the exponent function relation; To vertical stress, their slope dont vary with buried depth. In the different height, change curve of the friable rock level stress shows multinomial form, multinomial frequency in turn lift with height; vertical stress curve change from line to logarithm curve increasingly with height. During compacting friable rock, its stress changes largely when recycled time interval is initial. In the different height, recycled time interval increase with height.

关 键 词：采空区 松散岩体 数值模拟 

分 类 号：TD313.7[矿业工程—矿井建设]