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矿山开采沉陷是具有初始损伤的岩体在采动应力作用下所发生的再变形和再破坏过程,岩体中的初始损伤影响着岩体的力学行为和变形破坏特征,因此,研究和预测岩体采动沉陷,必须考虑岩体的损伤效应。通过构造具有初始损伤的岩体采动沉陷实验模型,研究了岩体采动沉陷的损伤效应。研究表明,岩体采动沉陷量值主要取决于岩体中初始损伤在空间中的总占位,其中的垂直移动量(下沉)取决于岩体中初始损伤在竖直平面内的总占位,其占位越大,下沉值越大;水平移动量取决于岩体中初始损伤在水平面内的总占位,其占位越大,水平移动值越大。
The mining subsidence is the reformation and re-destruction process of the rock mass with initial damage under mining stress. The initial damage in the rock mass affects the mechanical behavior and deformation failure characteristics of the rock mass. Therefore, the study and prediction of the rock mass Body mining subsidence, we must consider the damage effect of rock mass. By constructing the experimental model of mining subsidence with initial damage, the damage effect of the mining subsidence of the rock mass is studied. The results show that the value of mining subsidence mainly depends on the total space occupancy of the initial damage in the rock mass. The vertical displacement (sink) of the rock mass depends on the total of the initial damage in the rock mass in the vertical plane The larger the position, the larger the subsidence. The horizontal displacement depends on the total space occupied by the initial damage in the rock mass. The greater the space occupancy, the greater the horizontal movement.