节理裂隙岩体随机特性分析及其工程应用

项目名称： 节理裂隙岩体随机特性分析及其工程应用

项目编号： No.41272325

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 贾超

作者单位： 山东大学

项目金额： 65万元

中文摘要： 节理岩体的力学响应特性成为影响岩石地下工程安全稳定性的至关重要问题。岩体中节理裂隙分布的随机性、岩体力学强度参数及所遭受的外界荷载的不确定性等使得地下工程不可避免地存在风险，对不确定性因素造成的风险越加受到人们的重视。本课题运用随机力学理论，考虑节理岩体节理裂隙分布、岩体力学参数及外来荷载的随机性，研究节理岩体的随机力学响应问题，并用地质代表单元体的力学特性以随机分析法研究典型的大型地下洞室工程的安全稳定性，揭示典型地下洞室工程在随机因素作用下的失效破坏模式，并对洞室风险的时空响应问题进行探索，进行相应的洞室工程风险分级机制的研究，提出应对风险的措施。并拟开展一定的节理岩体单元体的块体模型试验，并与数值分析做对比。通过以上关键科学问题的研究，为节理岩体地下洞室工程的设计施工方案和参数的选取、支护加固措施的选择以及风险应对措施的制定提供科学有效的依据，推动岩石力学随机分析领域的研究和发展。

中文关键词： 节理岩体；随机力学；实验研究；数值分析；工程应用

英文摘要： With the rapidly development of rock engineering,the mechanical response of joint rock mass becomes a critical issue, which affecting the safety and stability of the underground rock engineering. The distribution of joints and fissures in rock mass has random characteristics, the same with rock strength parameters and external loads on joint rock mass. Therefore, underground rock engineering has unavoidable risk under these uncertainty factors. Risk caused by the uncertainties has attracted increasing attention by researchers and engineers.So it is a very important question for researchers and engineers to study the uncertains in rock engineering from theroy and engineering application. In order to research the stochastic mechanical response of joint rock mass, engineering stochastic mechanics theory can be adopted; the randomness of rock joint fissures distribution ， rock strength parameters and external loads on joint rock mass are taken into consideration. Based on stochastic analysis method, the safety and stability of the typical large underground rock cavern project is studied by using mechanical properties of Representative Elemental volume(REV). Failure modes of the typical underground rock project with the influence of random factors will be revealed. This subject research also explores spatial and

英文关键词： joint rock；random mechanics；Experimental Study；numerical simulation；engineering application