摘要
当前,我国石油储库建设处于非常重要的发展期,地下储油洞库的围岩稳定性分析评价是影响储库设计的重要内容。因洞库区域岩体内各种地质缺陷的存在、岩体结构特征的复杂性和探测手段的局限性,以及当前裂隙岩体稳定分析技术的发展水平局限性,致使洞库围岩稳定分析的难度很大,成果的可靠性仍然不足。地下储油库通常浅埋于硬岩中,洞室围岩失稳往往表现为结构面切割形成的块体失稳,采用块体理论可以对结构面不同组合形成的可动块体及关键块体进行识别,并对这些块体进行稳定性评价和支护分析。本文以某地下储油洞库为例,首先分析洞库区域结构面发育特征,并采用全空间赤平投影分析不同结构面组合形成的可动块体。在此基础上识别关键块体,并根据其形态特征进一步确定支护块体,最后根据多种支护块体所需的支护力计算结果,给出了如何确定洞室围岩支护设计参数的分析方法。
At present,the construction of oil storage in China is in a very important development period.The stability analysis and evaluation of surrounding rocks of underground oil storage caverns is an important content affecting the design of oil storage.Due to the existence of various geological defects in rock mass in cavern area,the complexity of rock mass structure characteristics and the limitations of detection methods,as well as the development level limitations of current analysis techniques for the stability of fractured rock mass,stability analysis of rock mass surrounding caverns are very difficult,and the reliability of results is still insufficient.Underground oil storage caverns are usually buried shallowly in hard rock,and the instability of surrounding rock is usually manifested as block instability derived from discontinuity cutting.The movable blocks and key blocks formed by different combinations of discontinuities can be identified by block theory,and the stability evaluation and support analysis of these blocks can be carried out.In this paper,taking an underground oil storage cavern as an example,the development characteristics of discontinuities in the cavern area are analyzed firstly,and movable blocks formed by different discontinuity combinations are analyzed by whole-space stereographic projection.On this basis,key blocks are identified,and support blocks are further determined based on their morphological characteristics.Finally,according to the support force calculation results required by various support blocks,an analysis method for determining support design parameters of surrounding rock of tunnel is given.
作者
荆少东
徐帅陵
王强
王旭阳
马永勋
Jing Shaodong;Xu Shuailing;Wang Qiang;Wang Xuyang;Ma Yongxun(Sinopec Petroleum Engineering Corporation,Dongying,Shandong 257026,P.R.China;Hunan Provincial Communications Planning,Survey and Design Institute Co.Ltd,Changsha 410200,P.R.China;Badong National Observation and Research Station of Geohazards,China University of Geosciences,Wuhan 430074,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2023年第S01期124-130,138,共8页
Chinese Journal of Underground Space and Engineering
关键词
地下储油洞库
块体理论
关键块体
洞室支护
underground oil storage cavern
block theory
key blocks
cavern support
作者简介
荆少东(1972—),男,山东莱阳人,正高级工程师,主要从事岩土工程勘察、地质工程与能源环保方向的研究工作。E-mail:1318315178@qq.com;通讯作者:王旭阳(1996—),男,河南南阳人,硕士,主要从事岩土工程、地下工程等领域的研究工作。E-mail:1184977529@qq.com
