【摘要】 提出了天然岩体的分形性质;研究并总结了地下开挖影响下岩体初始裂隙分布分维、裂纹扩展或断裂表面生成分维、采动岩体再生裂隙分维等一系列能用分形几何来描述的现象随时间的动态演化规律;揭示了岩体受力变形过程中的应力状态、力学性能、物理和化学性质的演化与其相关分维值的关系;展望了岩体分形性质及其受力演化规律的研究意义,为从更深层次认识岩体变形破坏的非线性、复杂性架起了桥梁,包括岩体动力学演化过程的混沌特征、岩体分形演化力学行为中的突变现象和岩体裂纹演化的协同效应;最后展望了岩体分形性质及其受力演化规律的应用领域及其发展前景。更多还原

【Abstract】 The fractal characteristics of natural rock masses are put forward, the laws of dynamic evolution of fractal phenomena are studied and summarized, including fractal dimension of the distribution of initial cracks, expansion of cracks or appearance of cracks, and reborn cracks of rock mass under influence of underground mining. The relations between the value of fractal dimension and the stress state, mechanics property, evolution of physical and chemical characteristics are discussed, the significance of studying fractal character of rock mass and its evolution laws are forecasted, and a new research route for more knowledge of nonlinear complexity of failure of rock mass is put forward, including the chaos characteristics in process of its dynamic evolution, the mutational phenomenon of mechanical action of fractal evolution and synergetic effect of crack evolution. The application domain and prospect of the of fractal characteristics and its evolution law are proposed.更多还原