Scholarlink

<p>With the global transition toward low-carbon energy, it has become a prominent research focus to transform abandoned salt caverns into large-scale energy storage facilities. However, it remains a critical challenge to resolve surface subsidence and stability issues during the energy storage process. This paper proposes a stability evaluation method based on surface subsidence and establishes a quantitative relationship between surface subsidence and cavern shrinkage. Taking a reconstructed salt cavern in Huai’an as a case study, this paper analyzes both cavern stability and the stability of surface structures. A sensitivity analysis is also conducted on cavern parameters, layer parameters, and operating parameters. The results demonstrate that: (1) By analyzing surface tilt and curvature, it can be determined whether the stability of surface structures complies with standard requirements. Cavern stability can be inversely evaluated based on surface subsidence data. (2) Cavern burial depth constitutes the predominant factor influencing the stability of surface structures, followed by the lower pressure coefficient and layer parameters, while operation time and cavern diameter also exert certain influences. (3) When all parameters remain within reasonable ranges, the stability of surface structures meets standard specifications. The impact of surface subsidence induced by gas storage in salt mines is relatively minor. Larger cavern volumes lead to increased surface tilt and curvature, with peak values exhibiting enhanced sensitivity to parameter variations. The findings provide a theoretical basis for studying surface subsidence and the stability of surface structures during the gas storage process and offer crucial engineering guidance for reconstructed salt caverns.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Surface subsidence and stability analysis on reconstructed salt cavern for underground gas storage

  • 期刊论文

  • 发表日期：

    2026年7月20日

查看全文
  • Guimin Zhang,
  • Zhaoliang An,
  • Yuxuan Liu,
  • Hao Zhang,
  • Kai Liu,
  • Xiao Wang,
  • Yibo Wu,
  • Qi Wang

摘要

With the global transition toward low-carbon energy, it has become a prominent research focus to transform abandoned salt caverns into large-scale energy storage facilities. However, it remains a critical challenge to resolve surface subsidence and stability issues during the energy storage process. This paper proposes a stability evaluation method based on surface subsidence and establishes a quantitative relationship between surface subsidence and cavern shrinkage. Taking a reconstructed salt cavern in Huai’an as a case study, this paper analyzes both cavern stability and the stability of surface structures. A sensitivity analysis is also conducted on cavern parameters, layer parameters, and operating parameters. The results demonstrate that: (1) By analyzing surface tilt and curvature, it can be determined whether the stability of surface structures complies with standard requirements. Cavern stability can be inversely evaluated based on surface subsidence data. (2) Cavern burial depth constitutes the predominant factor influencing the stability of surface structures, followed by the lower pressure coefficient and layer parameters, while operation time and cavern diameter also exert certain influences. (3) When all parameters remain within reasonable ranges, the stability of surface structures meets standard specifications. The impact of surface subsidence induced by gas storage in salt mines is relatively minor. Larger cavern volumes lead to increased surface tilt and curvature, with peak values exhibiting enhanced sensitivity to parameter variations. The findings provide a theoretical basis for studying surface subsidence and the stability of surface structures during the gas storage process and offer crucial engineering guidance for reconstructed salt caverns.