摘要
岩石强度是岩体工程设计的基本依据。它不仅与确定的因素有关，而且在很大程度上呈现出随机性和模糊性。这种双重非确定性使得岩石强度的准确描述十分困难。为了研究其随机性，基于薄弱环节理论的岩石统计强度得到了发展。岩石工程实践表明，一般情况下岩石破坏并非突变现象，而是一个渐进破坏过程，因而岩石破坏的准确描述应当采用模糊集。本文将模糊随机过程引入岩石断裂破坏研究，认为在复杂受力环境下岩体受损至破坏的演化服从扩散过程，进而导出了岩石模糊强度的表达式，并设计了计算程序。通过对某矿山矿柱强度分析，证实了模糊强度理论在这一领域中应用的合理性。
Rock strength is a basic parameter for rock engineering design. It is not only related to some determinative factors, but also to great extent it has randomness and fuzziness.These uncertainties make it very difficult to describe accurately the rock strength. To investigate randomness statistic rock strength based on the theory of weak links was developed.The projects in rock have shown that rock failure generally is not a sudden change phenomenon, but a gradual change process. Therefore, fuzzy set can be used to describe rock failure accurately. The paper introduces fuzzy random process into research of rock failure. It is considered that in a complex stress environment,evolution of rock failure follows a diffusion process. The expressions of rock fuzzy strength are thus deduced and a calculation program is designed. Analysis of strength theory is rational in application in this field.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1994年第5期450-455,共6页
Journal of China Coal Society
基金
国家自然科学基金
关键词
模糊概率
裂纹
断裂
岩石力学
强度
rock strength
fuzzy probability
cracks and fissures evolution
fracture
