基于西原模型的非线性损伤蠕变模型  

Nonlinear Damage Creep Model Based on Xiyuan Model

作　　者：付腾飞[1] 付宝杰[1] FU Teng-fei;FU Bao-jie(Energy and Safety School, Anhui University of Science & Technology, Huainan 232001, China)

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南232100

出　　处：《煤矿开采》2016年第4期1-4,共4页Coal Mining Technology

基　　金：国家自然科学基金(51174002)

摘　　要：针对传统的西原模型不能较好地反映岩石蠕变非稳定阶段,且多数学者对西原模型的修正是通过屈服强度阈值来界定非稳定阶段,而通过时间阈值考虑非稳定蠕变阶段界定的研究相对较少。在西原模型的基础上,引入Kachanov损伤理论及时间损伤阈值,建立了一种同时描述3个阶段的非线性损伤蠕变方程式。通过灰岩蠕变试验得到试验数据,对新的非线性损伤蠕变模型的参数进行反演,并进行曲线拟合,分析岩石的蠕变损伤过程和对应阶段的稳定性,证明了该模型的正确性和合理性,为岩石流变失稳现象提供理论依据。To the problems of instability step of rock creep deformation could not be reflected by traditional Xiyuan model, and as the modified Xiyuan model for most of scholars, instability deformation step was confirmed by yield strength threshold value, but instability creep deformation step was confirmed by time threshold value was less. On the basis of Xiyuan model, Kachanov damage theory and time damage threshold was introduced, nonlinear damage creep formula that explained three steps at the same time was built. The experimental data was obtained by creep experiment of limestone, the parameters of new nonlinear damage creep model were inverted,and curve fitting was analyzed, the creep damage process of rock and its stability of corresponding step, the results proved the model was right and reasonable, it references for rock rheology instability phenomenon theory.

关 键 词：西原模型 损伤 非线性 加速蠕变 

分 类 号：TD325[矿业工程—矿井建设]