地下储油岩库稳定性的三维流固耦合分析  

3D fluid-mechanical coupling stability analysis of underground petroleum storage caverns

作　　者：王怡[1] 王芝银[1] 许杰[2] 张志沛[3] 

机构地区：[1]中国石油大学城市油气输配技术北京市重点实验室,北京102249 [2]中国石油天然气管道工程有限公司,河北廊坊065000 [3]西安科技大学地质与环境工程系,陕西西安710054

出　　处：《中国石油大学学报（自然科学版）》2009年第3期132-137,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(50374049)

摘　　要：地下储油岩库具有洞室规模大,空间结构复杂,地下水渗流作用等特点,针对流固耦合对储油岩库整体稳定性的影响、复杂交叉结构的空间受力变形特征及掌子面推进的空间影响范围等问题,应用FLAC3D大型工程软件对地下储油岩库稳定性进行三维流固耦合分析。研究结果表明:地下水渗流与应力的耦合效应使洞库围岩强度弱化,塑性区及洞周围岩变形均明显增大,串联洞与主洞室的交接部位是设计与施工的关注点,尤其是主洞室拱部与其他结构的交接部位;交叉结构的存在使掌子面推进的空间影响范围扩大到两个主洞室间距的2倍左右,洞室围岩的受力变形规律对小的开挖步长不十分敏感。Underground petroleum storage caverns are characterized by large bulk, complex structure and ground water permeation fluid action. Due to those facts, 3D fluid-mechanical coupling stability analysis of underground petroleum storage caverns was carried out by using FLAC^3D procedure. The influences of ground water seepage on the stability of surrounding rock mass, the distribution features of internal force and deformation behavior of intersections, and the zone influenced by advancing working face were studied. The results indicate that considering the coupling effect of ground water seepage and stress, the strength of surrounding rock mass is reduced, plastic zone and deformation of surrounding rock increase obviously. During the phase of design and construction, the connecting caverns cross the main caverns should be paid more attention, especially the intersections at the arch of main caverns. Due to the existence of structural intersections, the domain influenced by excavation expands to the double of the space between the two main caverns. And the mechanical behaviors of surrounding rock are not very sensitive to small excavation steps.

关 键 词：地下储油岩库 数值仿真 流固耦合 稳定性分析 

分 类 号：TE822[石油与天然气工程—油气储运工程]