融化作用下含冰裂隙冻岩强度特性及寒区边坡失稳研究现状

如何科学评价裂隙冻岩质边坡稳定性、如何采用有效措施保证冻岩边坡工程的安全建设和运营，已是目前岩石力学研究领域的一个重要课题.首先对青海木里地区含冰裂隙冻岩地层煤矿露采过程中的大规模边坡工程问题开展现场勘察和试验研究，分析了高寒地区冰体赋存特征、含冰地层消融特征及含冰地层融水出流特征；结合前人研究，较为全面地总结了含冰裂隙冻岩强度特性及冻岩边坡普遍性的变形失稳特点，提出寒区冻岩边坡失稳机理为冰-岩系统在热侵蚀和荷载共生作用下的热力耦合结果；对消融作用下含冰裂隙冻岩的物理力学、热力耦合特性及裂隙冻岩质边坡稳定性评价等方面的国内外研究现状进行了综述和讨论；认为开展融化作用下含冰裂隙冻岩体强度特性及边坡失稳研究将是与冻融损伤并重的一个新的研究方向.

Strength behavior of frozen fractured ice-filled rock mass and research status of slope instability during thawing

The slope instability with thawing effect,is a complicated catastrophe process of moisture-heat-stress coupled in frozen fractured ice-filled rock mass.And it has been an important subject in the area of rock mechanics and engineering practice in cold region,what is how to scientifically evaluate its stability and take effective measures to ensure the construction and operation safety of frozen fractured rock slope.So systematic field investigation and experimental study on open-pit mining slope in Muli,Qinghai province have been done. The characteristics of ice occurrence,the ablation characteristics of ice-filled rock formation and the ice thaw-water dissipation characteristics were analyzed,the strength behavior of frozen fractured ice-filled rock mass and open-pit mining slope instability were concluded and summarized.At last,the physical mechanics properties, thermal mechanical coupling of ice-filled rock and stability assessment of the slope with thawing effect at home and abroad were reviewed comprehensively.The study of strength behavior of frozen fractured ice-filled rock mass and open-pit mining slope instability with thawing effect would be a novel research direction,which is equally important to reveal the mechanism of damage development of fractured rock mass under freezing-thawing.