摘要
基于钙质胶结砂岩受酸腐蚀机理主要为碳酸钙溶解导致孔隙扩大并且其分布具有随机性的事实,提出用Weibull分布函数反映岩石非均匀性的方法,建立受腐蚀岩石的非线性弹性本构方程。采用无扰动CT数计算了岩石的损伤变量,所得结果可用于估算均匀性系数,为酸雨地区岩石力学性质研究提供可借鉴的思路。
Based on the fact that calcium carbonate (CaCO3) is dissolved and the pore is expanded in the calcareous cementitious sandstone subjected to hydrochloric acid attack; and the strength of corroded rock has the characteristics of random distribution. The method to describe rock heterogeneity is proposed by in terms of Weibull distribution function and the nonlinear elastic constitutive equation of the corroded rock is established. The homogeneity coefficient is evaluated by means of nondestructive X-ray CT scanning technique. The results indicate that the acid environment has strong influence on mechanical properties of rock.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第11期1852-1856,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
陕西省自然科学研究资助项目(K01047)
陕西省教育厅专项科研计划资助项目(AJ01052)
关键词
岩石力学
Weibull分布函数
均匀性系数
本构方程
Hydrochloric acid
Mathematical models
Mechanical properties
Sandstone
Weibull distribution
