岩石爆破逾渗断裂行为与块度分布研究  

Percolation Fracture Behavior and Fragmentation Distribution in Rock Blasting

作　　者：邵鹏[1] 张勇[1] 贺永年[1] 张东升[2] 

机构地区：[1]中国矿业大学 建筑工程学院,江苏徐州221008 [2]中国矿业大学 能源与安全工程学院,江苏徐州221008

出　　处：《中国矿业大学学报》2004年第6期635-640,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金重大项目(50490273)国家自然科学基金项目(50374065)

摘　　要：岩石是一种内部空间结构具有强烈随机性的高度无序介质,其爆破损伤断裂和破碎过程极为复杂.运用逾渗理论和重整化群方法分析了岩石损伤断裂的临界性质,阐明了岩石断裂破坏的物理机制,建立了临界参数与岩石宏观物理性质之间的联系,揭示了临界参数的物理意义.根据破裂面分维与碎块分维的关系结合损伤演化方程,提出了块度分维计算式,研究了爆破块度分布规律.Rock is a sort of highly disordered material with random distributed spatial structure inside, and the damage fracture and fragmentation process of rocks under explosion loading is very complex. In this paper, percolation theory and renormalization group method were used to analyze the critical property during rock damage fracture process, and the physics mechanism of this fracture process was clarified. According to the analysis, the relationship between critical parameters and macro physic parameters was established, while physical significance of critical parameters was also brought to light. Combining the relationship between surface and fragmentation fractal dimension with damage evolvement equation, a formula which can be used to calculate fragmentation fractal dimension was obtained, and the fragment size distribution of rocks was studied.

关 键 词：爆破 损伤断裂 逾渗 重整化群 块度分布 岩石学 

分 类 号：TD231.1[矿业工程—矿井建设]