逾渗与岩石破裂的计算机模拟研究

A COMPUTER SIMULATION STUDY ON PERCOLATION AND ROCK FRACTURE

摘要:

用计算机模拟方法研究了岩石破裂的逾渗模型,给出了在微裂隙随机分布情况下破裂集团的分布图象、破裂集团的大小分布规律、总破裂集团数、集团平均大小、b值、逾渗分维D及临界情形。所得结果与其他模型和实验基本一致,表明通渗模型是描述岩石破裂扩展演化过程的一种较合适的模型。还发现了岩石破裂过程存在的两个转折点,深入研究这两个转折点附近岩石的宏观性质,可为探索地震孕育演化过程的前兆性质提供依据。

Abstract:

In this paper,the percolation of rock fracture is studied by using computer simulation method,and when micro-fractures distribute randomly,fracture cluster distribution pattern,fracture cluster size distribution law,total fracture cluster number, cluster mean size,b value,percolation fractal dimension D,critical case and so on are given. The results according with other models and laboratory experiments show that the percolation mode is a suitable model for describing rock fracture process. Two turning points in rock fracture process are found,thus authors point out that studying macroscopic character of rock nearby those two turning points can better research precursory character in seismogenic process.