基于影响函数法盐穴储气库地面沉降与预警阈值研究

doi:10.13722/j.cnki.jrme.2023.0753

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摘要针对盐穴储气库腔群运行期产生的地面沉降缺乏有效的理论预测模型，通过影响函数法对盐穴储气库因腔体收缩产生的地面沉降进行研究。运用数值模拟方法对影响函数法体积传递系数的单腔变化规律和双腔影响因素进行研究，建立基于腔群效应修正的影响函数法地表沉降预测模型。结合金坛储气库工程实例，运用修正的地表沉降预测模型分析盐穴储气库的沉降，基于腔体体积收缩提出了储气库地面沉降安全预警阈值。研究结论显示，地表沉降影响函数法能较好地模拟盐穴储气库腔体收缩产生的地面沉降，盐穴储气库运行周期内体积传递系数位于0.6～0.8范围，体积传递系数随储气库腔体体积收缩比增大而不断增大。应用工程实例中，盐穴储气库运行周期内地面沉降建议预警阈值为累计值不超过200 mm。

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	陈锋1
	胡士章2
	王亚2
	王子恒3
	孟鑫4
	叶良良1

关键词 ：地下工程, 盐穴储气库, 地面沉降, 影响函数法, 体积传递系数, 预警阈值

Abstract：In view of the lack of effective theoretical prediction models for surface subsidence caused by the operation of groups of salt caverns for gas storage，this paper studies the surface subsidence caused by cavern shrinkage of gas storage through the influence function method. The numerical simulation method is used to study the influence function method，including the variation law of the volume transfer coefficient of single cavern and the influencing factors of double cavern. A surface subsidence prediction model based on cavern group effect correction is established using the influence function method. Combined with the engineering experiment of Jintan gas storage，the modified surface subsidence prediction model is used to analyze the subsidence above salt caverns，and a surface subsidence early-warning threshold based on the safety of cavern volume shrinkage is proposed. The conclusion shows that the influence function method can effectively calculate the surface subsidence caused by the shrinkage of the salt cavern. During the operation period of the salt cavern gas storage，the volume transfer coefficient is between 0.6–0.8，and it continuously increases with the increase of the volume shrinkage ratio of the gas storage. Applied to engineering examples，the recommended early-warning threshold for surface subsidence during the operation period of the salt cavern gas storage is that the cumulative value does not exceed 200 mm.

Key words： underground engineering salt cavern gas storage land subsidence influence function method volume transfer coefficient warning threshold

引用本文:

陈锋1，胡士章2，王亚2，王子恒3，孟鑫4，叶良良1. 基于影响函数法盐穴储气库地面沉降与预警阈值研究[J]. 岩石力学与工程学报, 2023, 42(S2): 4082-4090.
CHEN Feng1，HU Shizhang2，WANG Ya2，WANG Ziheng3，MENG Xin4，YE Liangliang1. Study on subsidence and early-warning threshold of salt cavern gas storage based on influence function method. , 2023, 42(S2): 4082-4090.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2023.0753 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/IS2/4082

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