盐穴储气库泥岩夹层特性及建腔期夹层破断模型的构建

doi:10.3724/1000-6915.jrme.2025.0460

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Abstract To accurately predict the collapse step distance of mudstone interlayers during cavern leaching and ensure the stability of salt cavern gas storage facilities, this study conducts an in-depth analysis of the structural characteristics and mechanical properties of mudstone interlayers, establishing a predictive model for interlayer fracture. Macroscopic analysis and point load tests on mudstone interlayer samples from Submember 3b of Member 3 of the Buxin Formation in the Sanshui District salt mine revealed the following: (1) the structural characteristics of the mudstone interlayer vary significantly from top to bottom, with the lower section developing multi-angle fractures (partially filled with salt rock), while the upper part remains dense; (2) consequently, the interlayer is categorized into an upper high-strength mudstone and a lower low-strength mudstone, with point load tests confirming that the uniaxial compressive strength of the high-strength mudstone is approximately 5.5 times that of the low-strength mudstone; (3) under brine soaking, the high-strength mudstone exhibits significant softening effects within the initial 14 days, after which its strength tends to stabilize; the long-term strength is primarily influenced by intrinsic interlayer characteristics, such as the proportion of high-strength mudstone and interlayer thickness. Based on these properties, the progressive fracture mechanism of the mudstone interlayer is revealed, which can be divided into three stages: low-strength mudstone fracture, high-strength mudstone fracture, and operational-stage fracture. Ultimately, a fracture distance prediction formula is established that comprehensively considers soaking time and interlayer characteristics (high-strength mudstone proportion and thickness). The study clarifies that: (1) buckling failure occurs in the interlayer when the high-strength mudstone proportion exceeds a critical value (approximately 0.2); (2) when the high-strength mudstone proportion is relatively low, non-buckling failure is more likely to occur. These research findings provide a theoretical basis for predicting and controlling interlayer collapse during the leaching of salt cavern gas storage facilities.

Key words： rock mechanics gas storage characteristics of mudstone interlayers interlayer failure model strength degradation establish gas storage caverns

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	Articles by authors
	MENG Henglei
	YANG Weifeng*
	LIU Xing
	ZHENG Xinyuan
	WANG Yule

Cite this article:

MENG Henglei,YANG Weifeng*,LIU Xing, et al. Characteristics of mudstone interlayers and mechanical failure model development during salt cavern gas storage construction[J]. , 2026, 45(1): 250-265.

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https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2025.0460 OR https://rockmech.whrsm.ac.cn/EN/Y2026/V45/I1/250

[1] 康燕飞. 盐岩损伤愈合与再固结特性研究[博士学位论文][D]. 重庆：重庆大学，2023.(KANG Yanfei. Research on the healing and re-solidification characteristics of salt rock damage[Ph. D. Thesis][D]. Chongqing：Chongqing University，2023.(in Chinese))
[2] 中华人民共和国自然资源部.《中国矿产资源报告》[DB/OL]. 2024.https://chinacma.org.cn/static/upload/file/20250604/1749013902101555.pdf.(Ministry of Natural Resources，PRC，"China mineral resources report"[DB/OL]. 2024. https://chinacma.org.cn/static/upload/file/20250604/1749013902101555.pdf.(in Chinese))
[3] YANG C，WANG T，LI Y，et al. Feasibility analysis of using abandoned salt caverns for large-scale underground energy storage in China[J]. Applied Energy，2015，137：46–48.
[4] 杨春和，贺涛，王同涛. 层状盐岩地层油气储库建造技术研发进展[J]. 油气储运，2022，41(6)：614–624.(YANG Chunhe，HE Tao，WANG Tongtao. Research and development progress of technology for building oil and gas reservoirs in layered salt rock strata[J]. Oil and Gas Storage and Transportation，2022，41(6)：614–624.(in Chinese))
[5] 李建君. 中国地下储气库发展现状及展望[J]. 油气储运，2022，41(7)：780–786.(LI Jianjun. Current situation and prospects of China's underground gas storage facilities development[J]. Oil and Gas Storage and Transportation，2022，41(7)：780–786.(in Chinese))
[6] 施锡林，李银平，杨春和，等. 盐穴储气库水溶造腔夹层垮塌力学机制研究[J]. 岩土力学，2009，30(12)：3 615–3 620.(SHI Xilin，LI Yinping，YANG Chunhe，et al. Research on the mechanical mechanism of collapse of water-soluble cavity interlayers in salt cavern gas storage facilities[J]. Rock and Soil Mechanics，2009，30(12)：3 615–3 620.(in Chinese))
[7] 施锡林，李银平，杨春和，等. 卤水浸泡对泥质夹层抗拉强度影响的试验研究[J]. 岩石力学与工程学报，2009，28(11)：2 301–2 308. (SHI Xilin，LI Yinping，YANG Chunhe，et al. Experimental study on the effect of salt water soaking on the tensile strength of mud-like interlayers[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(11)：2 301–2 308.(in Chinese))
[8] 施锡林，李银平，杨春和，等. 多夹层盐矿油气储库水溶建腔夹层垮塌控制技术[J]. 岩土工程学报，2011，33(12)：1 957–1 963.(SHI Xilin，LI Yinping，YANG Chunhe，et al. Control technology for water-soluble cavity-laying interlayers collapse in multi-layered salt mines for oil and gas storage[J]. Chinese Journal of Geotechnical Engineering，2011，33(12)：1 957–1 963.(in Chinese))
[9] 孟涛，梁卫国，陈跃都，等. 层状盐岩溶腔建造过程中石膏夹层周期性垮塌理论分析[J]. 岩石力学与工程学报，2015，34(增1)：3 267–3 273.(MENG Tao，LIANG Weiguo，CHEN Yuedu，et al. Theoretical analysis on the periodic collapse of gypsum interlayers during the formation of layered salt rock reservoirs[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.1)：3 267–3 273.(in Chinese))
[10] 王永春. 平顶山盐穴储气库夹层稳定性及垮塌灾害性研究[硕士学位论文][D]. 郑州：郑州大学，2019.(WANG Yongchun. Research on the stability of interlayers and collapse disaster of salt cave gas storage wells in Pingdingshan[M. S. Thesis][D]. Zhengzhou：Zhengzhou University，2019.(in Chinese))
[11] 王志荣，王永春，高志俭，等. 平顶山地下盐穴储气库泥岩夹层稳定性评价[J]. 高校地质学报，2019，25(1)：116–124.(WANG Zhirong，WANG Yongchun，GAO Zhijian，et al. Evaluation of the stability of mudstone interlayers in Pingdingshan underground salt cavern gas storage reservoirs[J]. Journal of Geology in Colleges，2019，25(1)：116–124.(in Chinese))
[12] MENG T，HU Y，FANG R，et al. Weakening mechanisms of gypsum interlayers from Yunying salt cavern subjected to a coupled thermo-hydro-chemical environment[J]. Journal of Natural Gas Science and Engineering， 2016，30：77–89.
[13] WANG T，YANG C，SHI X，et al. Failure analysis of thick interlayer from leaching of bedded salt caverns[J]. International Journal of Rock Mechanics and Mining Sciences，2015，73：175–183.
[14] WANG Y，LIU J. Critical length and collapse of interlayer in rock salt natural gas storage[J]. Advances in Civil Engineering，2018，2018(1)：865–880.
[15] BEKENDAM R，PAAR W. Induction of subsidence by brine removal[C]// Proceedings of the SMRI Fall Meeting. [S. l.]：[s. n.]，2002：1–12.
[16] ZHANG G，LIU Y，WANG T，et al. Research on anchoring effect and failure mechanism of hard interlayers in the cavern pillar of underground gas storage in bedded salt formations[J]. Journal of Energy Storage，2022，55：105–114.
[17] SUO J，FAN J，JIANG D，et al. Experimental study on fatigue failure properties of mudstone interlayers under discontinuous loading in salt cavern gas storage[J]. Engineering Failure Analysis，2024，159：108–143.
[18] WU F，MENG T，CAO K，et al. Influence of layering and fracture angles on the performance of salt-gypsum composites：implications for the safety of underground energy storage[J]. Energies，2025，18(9)：22–87.
[19] WEI X，HUANG W，SU X，et al. Failure mode characteristic of rocks containing a weak interlayer with different thickness and dip angles based on discrete-element method[J]. International Journal of Geomechanics，2025，25(3)：04025014.
[20] NIAN Y，WU S，HAN S. Numerical simulation of mechanical and fracture behavior of composite rock containing weak interlayers[J]. Computational Particle Mechanics，2024，11(4)：1 681–1 694.
[21] HU J，WEN H，XIE Q，et al. Effects of seepage and weak interlayer on the failure modes of surrounding rock：model tests and numerical analysis[J]. Royal Society Open Science，2019，6(9)：190790.
[22] LI J，TANG Y，SHI X，et al. Modeling the construction of energy storage salt caverns in bedded salt[J]. Applied Energy，2019，255：113866.
[23] ZHAO N，ZHANG Y，MIAO H，et al. Study on the creep and fracture evolution mechanism of rock mass with weak interlayers[J]. Advances in Materials Science and Engineering，2022，2022(1)：5004306.
[24] GUO J C，LUO B，ZHU H Y，et al. Multilayer stress field interference in sandstone and mudstone thin interbed reservoir[J]. Journal of Geophysics and Engineering，2016，13(5)：775–785.
[25] ZHANG Z，WANG T. Failure modes of weak interlayers with different dip angles in red mudstone strata，Northwest China[J]. Bulletin of Engineering Geology and the Environment，2023，82(5)：156.
[26] 方龙，秦占杰，石国成，等. 泰国暖颂钾盐矿床粗粒岩盐沉积特征及其成因研究[J]. 盐湖研究，2024，32(1)：107–119.(FANG Long，QIN Zhanjie，SHI Guocheng，et al. Study on the characteristics and genesis of coarse-grained rock salt deposition in the Namsong potassium salt deposit in Thailand[J]. Salt Lake Research，2024，32(1)：107–119.(in Chinese))
[27] 中华人民共和国国家标准编写组. GB/T 50266—2013工程岩体试验方法标准[S]. 北京：中国计划出版社，2013.(The National Standards Compilation Groups of People's Republic of China. GB/T 50266—2013 Standard for test methods of rock mass in engineering[S]. Beijing：China Planning Press，2013.(in Chinese))
[28] 中华人民共和国国家标准编写组. GB/T 50218—2014工程岩体分级标准[S]. 北京：中国计划出版社，2014.( The National Standards Compilation Groups of People's Republic of China. GB/T 50218—2014Standard for classification of rock mass in engineering[S]. Beijing：China Planning Press，2014.(in Chinese))
[29] LI D，WONG L N Y. Point load test on meta-sedimentary rocks and correlation to UCS and BTS[J]. Rock Mechanics and Rock Engineering，2013，46：889–896.
[30] LI W，ZHU C，HAN J，et al. Thermodynamic response of gas injection and withdrawal process in salt cavern for underground gas storage[J]. Applied Thermal Engineering，2019，163：114–180.