连续介质理论与块体理论在地下水封油库围岩稳定性分析中的应用:以烟台某地下水封油库为例  

Application of Continuum Theory and Block Theory on the Stability Analysis of Surrounding Rocks of Underground Water-Sealing Oil Storage Caverns:A Case Study of a Water-Sealing Oil Storage Caverns in Yantai

作　　者：黄伟[1] 项伟[1] 崔德山[1,2] 谭龙[1] 程超杰[1] 郞林智 

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074 [2]中国地质大学(武汉)教育部长江三峡库区地质灾害研究中心,武汉430074

出　　处：《地质科技情报》2016年第1期166-171,共6页Geological Science and Technology Information

基　　金：国家自然科学基金项目(41272308;41002102)

摘　　要：围岩的稳定性对地下水封油库的建造具有至关重要的影响。通过室内岩石实验(单轴试验、声发射试验和直剪试验)并结合野外地质调查与测绘的成果,获取了烟台某地下水封油库储油洞室围岩的岩体物理力学参数和优势结构面的空间分布特征;基于连续介质理论与块体理论,分别运用FLAC3D和Unwedge软件对烟台某地下水封油库围岩稳定性进行了数值仿真试验研究。研究结果表明:在只考虑两组控制性结构面而不考虑优势结构面组合关系的情况下,地下水封洞库围岩一般不会出现大范围的洞室失稳情况,整体处于稳定状态;但当考虑优势结构面组合关系时,不同的结构面组合会切割洞室围岩形成关键块体(引发局部破坏),关键块体主要位于拱顶与掌子面,其中拱顶的关键块体体积较小而掌子面处的关键块体体积较大。因此,拱顶和掌子面附近可能会出现局部块体破坏情况,施工过程中应对此给予足够的关注。The stability of surrounding rocks is significant to the construction of underground water-sealing oil storage caverns. Physical-mechanical parameters as well as spatial distribution characteristics of domi- nant discontinuum were determined by laboratory tests （uniaxial test, acoustic emission test and direct shear test）, geological surveying and mapping. Based on continuum theory and block theory, FLAC3D and Unwedge were applied to analyze the stability of surrounding rocks of water-sealing caverns. The results show that few instable zones occurred in the surrounding rocks of the underground water-sealing oil stor- age caverns, which tended to be generally stable when two groups of controlling discontinuum were neglec- ted. Key blocks which may lead to local instability, appear in vault with smaller volume and tunnel face with larger one by the incision of different dominant discontinuum when their syntagmatic relation come in- to view. Thus, key blocks are desirable to be considered as an important factor in estimating the stability of surrounding rocks in order to avoid the potential danger of block failure in vault and tunnel face under construction.

关 键 词：地下水封洞库 连续介质理论 块体理论 围岩稳定性 

分 类 号：TU457[建筑科学—岩土工程]