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The reloading mechanical properties of the surrounding rock in an underground energy storage cavern are crucial for determining the safety of underground energy storage projects. This study conducted triaxial loading and unloading tests on mudstone, as well as reloading tests on unloaded damaged mudstone. By employing testing and analysis techniques such as nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM), the research investigated the impact of unloading effects on the reloading mechanical properties of mudstone and revealed the deterioration mechanisms of reloading damaged mudstone. The results indicate that the fractal dimension ultimately decreases as confining pressure increases, and the confining pressure's control over internal micro-cracks in the mudstone becomes more pronounced. With increasing unloading damage, small-size micro-pores inside the mudstone samples develop into medium-sized pores, resulting in a higher internal porosity. The greater the initial unloading damage, the larger the reduction in reloading strength of the mudstone. The degree of unloading damage progressively affects the failure mode of rock samples, transitioning from shear failure to shear-tensile failure, and eventually to tensile-shear failure with increasing unloading damage. A correlation between unloading damage degree, porosity, and reloading strength has been established, bridging the gap between microstructural damage and macro-strength deterioration in unloaded damaged mudstone. This finding provides a reference for delineating unloading damage zones and predicting reloading strength within unloading areas.

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地下储能硐库围岩再加载力学性能是决定地下储能工程安全的关键。本文开展了泥岩三轴加载、卸载试验及卸荷损伤泥岩再加载试验,利用核磁、SEM等测试分析技术,研究了卸荷效应对泥岩再加载力学特性的影响规律,揭示了卸荷损伤泥岩再加载劣化机理。结果表明,随卸荷损伤程度的增加,泥岩试样内部小尺寸微孔隙向中孔隙发展,内部孔隙率越来越大;初始卸荷损伤程度越大,泥岩再加载强度降低幅度越大;卸荷损伤程度对岩样再加载破坏模式产生了逐渐显著的影响,随卸荷损伤程度增加,试样逐渐由剪切破坏过渡到剪张破坏,最终转变为张剪破坏。建立了卸荷损伤程度、孔隙率、再加载强度之间的本构关系,为卸荷损伤泥岩细观结构损伤到宏观强度劣化搭起了桥梁。研究成果可为卸荷损伤区划分、卸荷区内岩体的再加载强度预测预报提供参考。

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车德龙(1997—),男,黑龙江齐齐哈尔人,博士生,主要从事岩土工程理论基础及离散元数值应用方面的研究。E-mail:
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赵景锋(1981—),男,河南许昌人,高级工程师,主要从事铁路工程、地下工程岩土体勘察、岩土体力学特性方面的研究工作。E-mail:

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赵景锋(1981—),男,河南许昌人,高级工程师,主要从事铁路工程、地下工程岩土体勘察、岩土体力学特性方面的研究工作。E-mail:

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赵景锋(1981—),男,河南许昌人,高级工程师,主要从事铁路工程、地下工程岩土体勘察、岩土体力学特性方面的研究工作。E-mail:

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峰前卸荷损伤泥岩再加载力学特性研究
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赵景锋 1 , 车德龙 2, 3 , 赵二平 2, 3 , 张聪 2, 3 , 魏宇航 2, 3
地下空间与工程学报 | 理论与试验研究 2026,22(2): 506-516
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地下空间与工程学报 | 理论与试验研究 2026, 22(2): 506-516
峰前卸荷损伤泥岩再加载力学特性研究
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赵景锋1 , 车德龙2, 3 , 赵二平2, 3, 张聪2, 3, 魏宇航2, 3
作者信息
  • 1.中铁二院工程集团有限责任公司,成都 610031
  • 2.三峡库区地质灾害教育部重点实验室,湖北 宜昌 443002
  • 3.三峡大学 土木与建筑学院,湖北 宜昌 443002
  • 赵景锋(1981—),男,河南许昌人,高级工程师,主要从事铁路工程、地下工程岩土体勘察、岩土体力学特性方面的研究工作。E-mail:

通讯作者:

车德龙(1997—),男,黑龙江齐齐哈尔人,博士生,主要从事岩土工程理论基础及离散元数值应用方面的研究。E-mail:
Study on the Re-Loaded Mechanical Properties of Pre-Peak Unloading Damage Mudstone
Jingfeng Zhao1 , Delong Che2, 3 , Erping Zhao2, 3, Cong Zhang2, 3, Yuhang Wei2, 3
Affiliations
  • 1.China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, P. R. China
  • 2.Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, Yichang, Hubei 443002, P. R. China
  • 3.College of Civil Engineering and Architecture, China Three Gorges University, Yichang, Hubei 443002, P. R. China
出版时间: 2026-04-20 doi: 10.20174/j.JUSE.2026.02.12
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地下储能硐库围岩再加载力学性能是决定地下储能工程安全的关键。本文开展了泥岩三轴加载、卸载试验及卸荷损伤泥岩再加载试验,利用核磁、SEM等测试分析技术,研究了卸荷效应对泥岩再加载力学特性的影响规律,揭示了卸荷损伤泥岩再加载劣化机理。结果表明,随卸荷损伤程度的增加,泥岩试样内部小尺寸微孔隙向中孔隙发展,内部孔隙率越来越大;初始卸荷损伤程度越大,泥岩再加载强度降低幅度越大;卸荷损伤程度对岩样再加载破坏模式产生了逐渐显著的影响,随卸荷损伤程度增加,试样逐渐由剪切破坏过渡到剪张破坏,最终转变为张剪破坏。建立了卸荷损伤程度、孔隙率、再加载强度之间的本构关系,为卸荷损伤泥岩细观结构损伤到宏观强度劣化搭起了桥梁。研究成果可为卸荷损伤区划分、卸荷区内岩体的再加载强度预测预报提供参考。

岩石力学  /  开挖卸荷  /  再加载  /  耗散能  /  分形维数

The reloading mechanical properties of the surrounding rock in an underground energy storage cavern are crucial for determining the safety of underground energy storage projects. This study conducted triaxial loading and unloading tests on mudstone, as well as reloading tests on unloaded damaged mudstone. By employing testing and analysis techniques such as nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM), the research investigated the impact of unloading effects on the reloading mechanical properties of mudstone and revealed the deterioration mechanisms of reloading damaged mudstone. The results indicate that the fractal dimension ultimately decreases as confining pressure increases, and the confining pressure's control over internal micro-cracks in the mudstone becomes more pronounced. With increasing unloading damage, small-size micro-pores inside the mudstone samples develop into medium-sized pores, resulting in a higher internal porosity. The greater the initial unloading damage, the larger the reduction in reloading strength of the mudstone. The degree of unloading damage progressively affects the failure mode of rock samples, transitioning from shear failure to shear-tensile failure, and eventually to tensile-shear failure with increasing unloading damage. A correlation between unloading damage degree, porosity, and reloading strength has been established, bridging the gap between microstructural damage and macro-strength deterioration in unloaded damaged mudstone. This finding provides a reference for delineating unloading damage zones and predicting reloading strength within unloading areas.

rock mechanics  /  excavation unloading  /  reloading  /  dissipated energy  /  fractal dimension
赵景锋, 车德龙, 赵二平, 张聪, 魏宇航. 峰前卸荷损伤泥岩再加载力学特性研究. 地下空间与工程学报, 2026 , 22 (2) : 506 -516 . DOI: 10.20174/j.JUSE.2026.02.12
Jingfeng Zhao, Delong Che, Erping Zhao, Cong Zhang, Yuhang Wei. Study on the Re-Loaded Mechanical Properties of Pre-Peak Unloading Damage Mudstone[J]. Chinese Journal of Underground Space and Engineering, 2026 , 22 (2) : 506 -516 . DOI: 10.20174/j.JUSE.2026.02.12
  • 国家自然科学基金高铁联合基金项目(U2034203)
2026年第22卷第2期
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doi: 10.20174/j.JUSE.2026.02.12
  • 接收时间:2025-04-05
  • 首发时间:2026-06-17
  • 出版时间:2026-04-20
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  • 收稿日期:2025-04-05
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国家自然科学基金高铁联合基金项目(U2034203)
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    1.中铁二院工程集团有限责任公司,成都 610031
    2.三峡库区地质灾害教育部重点实验室,湖北 宜昌 443002
    3.三峡大学 土木与建筑学院,湖北 宜昌 443002

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车德龙(1997—),男,黑龙江齐齐哈尔人,博士生,主要从事岩土工程理论基础及离散元数值应用方面的研究。E-mail:
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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