岩移“四带”模型与动态位移反分析

为应用岩石力学数值分析方法进行岩层与地表移动计算，采用位移反分析方法，进行了模型识别和理论分析研究。认为：（１）采后覆岩结构具有分带性，结构力学模型应划分为破裂带、离层带、弯曲带和松散冲积层带；（２）岩石的本构方程可以应用内时理论和开尔文－伏尔特流变模型得到；（３）对于线性、粘弹塑性力学问题可应用三点抛物线方程法求得最优估计值；（４）地表水平移动是岩层与松散冲积层倾斜变形引起的，水平移动值取决于倾斜和表土层翘曲变形两种因素。

FOUR-ZONE" MODEL OF ROCKMASS MOVEMENT AND BACK ANALYSIS OF DYNAMIC DISPLACEMENT

To calculate rockmass and surface subsidence by using numeric analysis of rock mechanics, back analysis of displacement is used to study identification and theoretical analysis. The main results are:(1) The mechanical model of overburden after mining should be divided into four zones, namely, failure zone, separation zone, bending zone and loose alluvium zone; (2) The constitutive equation of rock can be obtained by applying endochronic theory and Kelvin-Voigt rheological model;(3) For mechanical problems, such as linearity, visco-elasticity and plasticity, three-point parabola equation can be used to get the optimal estimated value; (4)The horizontal displacement of surface results from inclined deformation of rockmass and topsoil. The horizontal displacement value depends on two factors, inclined deformation and topsoil warped deformation.