考虑细观形貌特征的岩石裂隙受压时变闭合规律

宋振宇; 颜炳明; 李博; 邹良超; 石振明

doi:10.3799/dqkx.2025.241

Volume 51 Issue 2

Feb. 2026

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Article Navigation > Earth Science > 2026 > 51(2): 496-512

Song Zhenyu, Yan Bingming, Li Bo, Zou Liangchao, Shi Zhenming, 2026. Study on Time-Dependent Closure Behavior of Rock Fractures Subject to Normal Stress. Earth Science, 51(2): 496-512. doi: 10.3799/dqkx.2025.241

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Song Zhenyu, Yan Bingming, Li Bo, Zou Liangchao, Shi Zhenming, 2026. Study on Time-Dependent Closure Behavior of Rock Fractures Subject to Normal Stress. Earth Science, 51(2): 496-512. doi: 10.3799/dqkx.2025.241

Citation:

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Study on Time-Dependent Closure Behavior of Rock Fractures Subject to Normal Stress

doi: 10.3799/dqkx.2025.241

Song Zhenyu^{1
,
,},
Yan Bingming¹,
Li Bo^{1, 2
,
,
,},
Zou Liangchao³,
Shi Zhenming^{1, 2}

1.
Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
2.
Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
3.
Department of Sustainable Development, Environmental Science and Engineering, Royal Institute of Technology, Stockholm, Sweden

Received Date: 2025-07-15
Publish Date: 2026-02-25

Abstract

Abstract

This study conducted time-dependent compression tests on asperities with different height-to-radius ratios using ultra-hard gypsum. According to Hertz contact theory, the attenuation laws of the elastic modulus of different asperities over time were fitted. Time-dependent closure tests were performed on fresh fracture surfaces of red sandstone and limestone under varying normal stresses. By integrating wavelet analysis, region growth algorithms, and the reference surface method, a novel approach was developed for identifying the mesoscale asperity morphology of rock fractures, and compared the differences in the number, height, and height-to-radius ratio of asperities before and after the experiment. Utilizing Boussinesq's solution, an influence matrix was constructed to account for interactions between asperities. Based on the law of the elastic modulus decaying over time, enabling time-dependent closure calculations for different rock fractures under variable stress conditions. This approach precisely analyzes the temporal evolution of strain, contact area, and contact stress for individual asperity, with simulation results matching experimental data in terms of damage area and creep deformation. The study reveals the pivotal role of asperities with distinct mesoscale morphological features in the time-dependent closure process of rock fractures under compression.
- rock fracture,
- asperity,
- morphological characteristics,
- time-dependent closure,
- Hertzian contact,
- rock mechanics

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References(44)

References

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