冻融作用下岩石损伤演化过程研究  

Study on Damage Evolution of Rock Under Freeze-thaw Action

作　　者：赵鑫[1] 袁阳 徐涛[1] ZHAO Xin;YUAN Yang;XU Tao(Center for Rock Instability&Seismicity Research,Northeastern University,Shenyang,Liaoning 110819,China)

机构地区：[1]东北大学岩石破裂与失稳研究所,辽宁沈阳110819

出　　处：《矿业研究与开发》2022年第6期112-118,共7页Mining Research and Development

基　　金：国家自然科学基金资助项目(51974062,41672301)。

摘　　要：冻融对寒区岩体工程的稳定性具有显著的影响,为探究冻融作用下的岩石损伤演化规律,建立了考虑岩石力学参数非均质性的岩石冻融损伤耦合作用本构模型,并开展了冻融作用下岩石损伤破裂过程模拟,模拟结果直观地再现了冻融作用下岩石裂纹的萌生、扩展、贯通过程。结果表明:冻融损伤对于岩石的损伤是一种由表及里的不可逆累积过程,揭示了冻融作用下岩石的应力场、变形及损伤演化规律,该模型可为冻融作用下的滑坡失稳灾害预测预警及灾害防治提供参考。Freezing and thawing has a significant impact on the stability of rock mass engineering in cold regions. In order to explore the law of rock damage evolution under freeze-thaw action, a rock freezing and thawing damage coupling constitutive model considering the heterogeneity of rock mechanical parameters was established. Then, the simulation of rock damage and fracture process under freeze-thaw action was carried out. The simulation results visually reproduce the initiation, propagation and penetration process of rock cracks under freeze-thaw action. The results show that the freeze-thaw damage to the rock is an irreversible accumulation process from the outside to the inside, and reveals the stress field, deformation and damage evolution law of the rock under the freeze-thaw action. The model can provide a certain reference for the prediction, early warning and disaster prevention of the landslide instability disaster under the freeze-thaw action.

关 键 词：岩石损伤 冻融作用 渗流-热-力学耦合 损伤演化 非均质性 

分 类 号：TD313[矿业工程—矿井建设] TU45[建筑科学—岩土工程]