岩石破坏机理的LCA模型数值模拟

基于弹塑性损伤理论，结合细胞自动机以及格构模型的优点，提出了格构细胞自动机模型，通过模拟岩石破坏过程的基本思路、模拟岩石非均质性、破坏过程声发射等具体方法，用于模拟岩石的劈裂破坏机理，定量地给出了预制裂纹岩石劈裂应力-应变曲线和声发射数。跟无预制裂纹试件相比，有预制裂纹的劈裂试样在劈裂过程中，虽然开始稍稍偏离了加载方向，但由于预制裂纹的导向作用，裂纹通过预制裂纹，重新回到了加载方向，直至贯通。从试验过程和结果上看，模拟效果是比较好的。

Numerical simulation of LCA model in rock failure mechanisms

The process of rock splitter is one of the main contents of studies on rock failure mechanisms. Based on elastic-plastic failure theory and the advantages of cellular automata and lattice model, the author presents a model of lattice cellular automata to simulate the mechanisms of rock splitter. And the basic thoughts to simulate rock failure, the methods to express the heterogeneity of rock, AE (acoustic emission) during rock failure and quantificational curves of stress-strain and AE of rock are introduced in detail. Compared to samples without pre-existing crack, the process of pre-existing crack starts from loading direction with little departure, and then returns to the loading direction because of the guiding function of pre-existing crack. From the processes and effect of simulated experimentations, we could gain better results.