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[1]梁五星,胡榕榕,杨帆,等.层状盐穴畸形溶腔爆破效应数值模拟[J].油气储运,2025,44(06):1-12.
LIANG Wuxing,HU Rongrong,YANG Fan,et al.Numerical simulation study on blasting effect of malformed solution cavities in stratified salt caverns[J].Oil & Gas Storage and Transportation,2025,44(06):1-12.
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LIANG Wuxing,HU Rongrong,YANG Fan,et al.Numerical simulation study on blasting effect of malformed solution cavities in stratified salt caverns[J].Oil & Gas Storage and Transportation,2025,44(06):1-12.
层状盐穴畸形溶腔爆破效应数值模拟
《油气储运》[ISSN:1000-8241/CN:13-1093/TE]
卷:
44
期数:
2025年06期
页码:
1-12
栏目:
出版日期:
2025-06-25
- Title:
- Numerical simulation study on blasting effect of malformed solution cavities in stratified salt caverns
- Keywords:
- Laminar salt caverns; numerical simulation; malformed solution cavity; blasting shaping; stability evaluation index
- 分类号:
- TE822
- 文献标志码:
- A
- 摘要:
-
【目的】在水溶开采过程中，地下盐穴常由于难溶夹层的存在而产生腔体偏溶、畸形等问题，且自然状态下该夹层的垮塌具有不可控性。对含夹层盐穴中畸形岩体进行控制爆破能够改善腔体形态、消除建腔隐患、有效加快建腔速度和效率。【方法】为研究层状盐穴难溶夹层及周边岩体对爆破作用的响应，利用ANSYS/LS-DYNA软件构建了含难溶夹层的层状盐穴爆破数值模型，揭示了溶腔内畸形岩体在单一爆源下的破坏模式与溶腔围岩在不同当量炸药作用下的损伤程度，通过对不同当量炸药与爆破效果之间的关系进行分析，提出由围岩水平向位移、竖向应力、有效塑性应变、顶板沉降量、剪切应力分布组成的盐穴储气库安全评价体系。【结果】围岩水平位移可有效表征溶腔侧向围岩的变形状态；有效塑性应变与剪切应力分布能够有效表征腔体围岩损伤状态并预测溶腔失效状况；竖向应力与顶板沉降量在预测腔体顶板的垮塌方面具有较好的敏感性。【结论】基于盐岩RHT（Riedel Hiermaier Thoma）本构模型进行层状盐穴畸形溶腔爆破数值模拟，并对5个指标进行具体分析，探究盐穴不同位置在不同爆破工况下的受损情况，结合已有的盐穴稳定性评价模型，提出适用于动态荷载作用下的溶腔稳定性评价指标，进一步完善盐穴安全评价体系。所得研究结果可为盐穴储气库稳定性评价提供参考。
- Abstract:
- [Objective] During the process of underwater solution mining of underground salt caverns, the presence of insoluble interlayers often leads to issues such as partial dissolution and cavity deformation. The collapse of such interlayers in a natural state is uncontrollable. Controlled blasting of deformed interlayers in salt caverns can improve the cavity shape, eliminate potential hazards during cavity creation, and effectively accelerate the cavity creation process. [Methods] To investigate the response of insoluble interlayers and surrounding rock masses in layered salt caverns to blasting, this paper employs ANSYS/LS-DYNA software to construct a numerical simulation model for blasting in layered salt caverns with insoluble interlayers. The model reveals the failure mode of deformed rock masses within the dissolution cavity under a single blast source and the degree of damage to the surrounding rock of the dissolution cavity under the action of different equivalent explosives. By analyzing the relationship between different equivalent explosives and blasting effects, a safety evaluation system for salt cavern gas storage facilities is proposed, which comprises horizontal displacement of surrounding rock, vertical stress, effective plastic strain, roof settlement, and shear stress distribution. [Results] The results indicate that: ① The horizontal displacement of surrounding rock can effectively characterize the deformation state of the lateral surrounding rock of the dissolution cavity; ② Effective plastic strain and shear stress distribution demonstrate good reliability in predicting the failure parts of the surrounding rock of the cavity; ③ Vertical stress and roof settlement exhibit good sensitivity in predicting the collapse of the cavity roof. [Conclusion] This paper conducts numerical simulations of blasting in layered salt caverns based on the RHT constitutive model of salt rock and analyzes five indicators in detail to explore the damage to various salt cavern structural positions under different blasting conditions. Combined with existing salt cavern stability evaluation models, stability evaluation indicators suitable for dissolution cavity stability under dynamic loads are proposed, further improving the salt cavern safety evaluation system. The research findings can provide a reference for the stability evaluation of gas storage facilities.
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更新日期/Last Update:
2025-03-04