基于屈服接近度的盐岩储气库多因素优化

利用深部盐岩洞穴进行能源地下储备是国际上广泛认可的能源储备方式,利用盐岩进行地下能源储存也已成为中国能源战略储备的重点部署方向。对于盐岩地下储库群来说,不同的设计、运行方案对地下储库的安全性影响也是不同的。针对该问题研究盐岩储库群的布置形式、矿柱宽度及运行压力对于围岩的稳定性的影响。引入屈服接近度(yield approach index,YAI)的概念,通过大量的数值模拟,以YAI作为定量参数,对比各种不同工况下储库群的围岩稳定性情况,给出盐岩地下储库群的优化布置方案,同时也得到了不同储气压力作用下的腔群稳定性结果。研究成果可为盐岩地下储库的工程设计、建设及运营管理提供有益参考和借鉴。

Research on Multi-factor Optimization of Storage Group in Salt Rock Based on Yield Approach Index

It is a widely accepted approach to use deep salt caverns for underground energy storage in the world. Using salt rocks for energy storage has also become the focus of our national strategy. For the underground storage group, the layout pattern and operation pressure have a significant influence on the safety of surrounding rock. This paper studies three main factors, the layout pattern, the pillar width and the operation pressure which affect the safety of salt caverns. The quantitative parameter YAI (yield approach index) is calculated by numerical simulation to compare stability of surrounding rock under different working conditions. The layout pattern can be optimized based on the calculation results. At the same time, it reveals the law about the stability of surrounding rock under the different operation pressure. The research results can provide useful reference for the engineering design, construction and operation management of salt rock storage.