Reliability Analysis of Rock Block Stability and Support for Underground Water-Sealed Storage Caverns

doi:10.12068/j.issn.1005-3026.2023.04.012

Abstract

Abstract: The stochastic distribution of geometrical and mechanical parameters of rock joints causes a high degree of uncertainty in the stability of rock mass engineering. Taking a project of underground water-sealed storage caverns as an example， and considering the uncertainty of dip directions， dip angles， cohesion and friction angles， the reliability of surrounding rock block stability and support system are studied using the reliability theory and numerical simulation， and the support parameters are tested and optimized. The results show that the reliability indexes of the surrounding rock blocks of Grade Ⅰ to IV are 4.23， 1.68， 0.65 and -0.07， respectively. After the support system is applied to Grade II， III and IV surrounding rocks， the reliability indexes of the surrounding rock blocks are 3.3， 3.0 and 2.0， respectively. The row spacing between supports is optimized， and the recommended values are 2.8， 2.0 and 1.6m for the surrounding rock blocks of Grade II， III and IV， respectively.

Key words: underground water-sealed storage cavern; parameter uncertainty; Monte Carlo method; failure probability; support reliability; parameter inspection and optimization

CLC Number:

TE82

QIAO Li-ping， LU Wei-li， MIN Zhong-shun， WANG Zhe-chao. Reliability Analysis of Rock Block Stability and Support for Underground Water-Sealed Storage Caverns[J]. Journal of Northeastern University(Natural Science), 2023, 44(4): 544-550.

References

[1] Liu H，Qiao L，Wang S，et al.Quantifying the containment efficiency of underground water-sealed oil storage caverns:method and case study ［J］.Tunnelling and Underground Space Technology，2021，110:103797.
[2]Zhao X D，Deng L，Zhang S J.Stability analysis of underground water-sealed oil storage caverns in China:a case study ［J］.Energy Exploration & Exploitation，2020，38(6):2252-2276.
[3]Xue Y G，Ning Z X，Qiu D H，et al.A study of water curtain parameters of underground oil storage caverns using time series monitoring and numerical simulation ［J］.Journal of Zhejiang University: Science A，2021，22(3):165-181.
[4]王者超，陆宝麒，李术才，等.地下水封石油洞库施工期安全风险评估研究［J］.岩土工程学报，2015，37(6):1057-1067.(Wang Zhe-chao，Lu Bao-qi，Li Shu-cai，et al.Risk assessment for an underground crude oil storage facility with water-curtaining system during construction phase ［J］.Chinese Journal of Geotechnical Engineering，2015，37(6):1057-1067.)
[5]Qiao L P，Wang Z C，Li S C，et al.Assessing containment properties of underground oil storage caverns:methods and a case study ［J］.Geosciences Journal，2017，21(4):579-593.
[6]Zhang B，Wang H，Wang L，et al.Large-scale field test on abandoned deep anhydrite mine-out for reuse as crude oil storage—a case study［J］.Engineering Geology，2020，267:105477.
[7]Langford J C，Diederichs M S.Reliability based approach to tunnel lining design using a modified point estimate method［J］.International Journal of Rock Mechanics and Mining Sciences，2013，60:263-276.
[8]Xu Z H，Gao B，Li S C，et al.A groundwater seal evaluation method based on water inflow for underground oil storage caverns ［J］.Tunnelling and Underground Space Technology，2018，82:265-277.
[9]Hoek E.Reliability of Hoek-Brown estimates of rock mass properties and their impact on design ［J］.International Journal of Rock Mechanics and Mining Sciences，1998，35(1):63-68.
[10]Li Z，Xue Y，Li S，et al.An analytical model for surrounding rock classification during underground water-sealed caverns construction:a case study from eastern China ［J］.Environmental Earth Sciences，2019，78(20):1-11.
[11]王者超，李术才，乔丽苹，等.地下石油洞库水封性评价方法体系及应用［J］.岩土工程学报，2016，38(11):2033-2042.(Wang Zhe-chao，Li Shu-cai，Qiao Li-ping，et al.Assessment methods for containment properties of underground crude oil storage caverns and their applications［J］.Chinese Journal of Geotechnical Engineering，2016，38(11):2033-2042.)
[12]Li Z K，Lu B，Zou J，et al.Design and operation problems related to water curtain system for underground water-sealed oil storage caverns ［J］.Journal of Rock Mechanics and Geotechnical Engineering，2016，8(5):689-696.
[13]Li H Z，Low B K.Reliability analysis of circular tunnel under hydrostatic stress field ［J］.Computers and Geotechnics，2010，37(1/2):50-58.
[14]Goh A T C，Zhang W.Reliability assessment of stability of underground rock caverns ［J］.International Journal of Rock Mechanics and Mining Sciences，2012，55:157-163.
[15]李健，郭忠平，郭嘉兴.基于中心点法的井下巷道锚杆支护可靠性分析［J］.煤矿安全，2019 (4):237-240.(Li Jian，Guo Zhong-ping，Guo Jia-xing.Reliability analysis of underground roadway bolt support based on central point method ［J］.Safety in Coal Mines，2019 (4):237-240.)
[16]王卫军，侯朝炯.回采巷道煤帮锚杆支护可靠性分析［J］.岩石力学与工程学报，2001，20(6):813-816.(Wang Wei-jun，Hou Chao-jiong.Reliablity analysis on coal wall bolting of extraction callery［J］.Chinese Journal of Rock Mechanics and Engineering，2001，20(6):813-816.)
[17]侯晓琳，郑怀昌，张晓君.矩形巷道锚杆支护系统可靠度分析研究［J］.煤炭科学技术，2016，44(sup 1):31-34.(Hou Xiao-lin，Zheng Huai-chang，Zhang Xiao-jun.Reliability analysis of bolting support system in rectangular tunnels［J］.Coal Science and Technology，2016，44(sup 1):31-34.)
[18]杨军伟，苏静，刘泽.基于可靠性分析的沿空留巷顶板支护效果研究［J］.矿业安全与环保，2013，40(2):62-65.(Yang Jun-wei，Su Jing，Liu Ze.Research of roof support effect for gob-side retained roadway based on reliability analysis ［J］.Mining Safety & Environmental Protection，2013，40(2):62-65.)
[19]Low B K，Einstein H H.Reliability analysis of roof wedges and rockbolt forces in tunnels ［J］.Tunnelling and Underground Space Technology，2013，38:1-10.
[20]Lü Q，Xiao Z P，Ji J，et al.Reliability based design optimization for a rock tunnel support system with multiple failure modes using response surface method ［J］.Tunnelling and Underground Space Technology，2017，70:1-10.
[21]Oreste P P.A probabilistic design approach for tunnel supports ［J］.Computers and Geotechnics，2005，32(7):520-534.