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Deterioration Laws of Mechanical Properties of Freeze-Thaw Andesite Under Different Confining Pressures
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Yunteng DENG1, 2, 3, Xuanze LIU4, Jun FU1, 2, 3, Han ZHOU1, 4, An CHEN1, Zheng FU2
Mining and Metallurgical Engineering | 2026, 46(3) : 137 - 144
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Mining and Metallurgical Engineering | 2026, 46(3): 137-144
• MINING •
Deterioration Laws of Mechanical Properties of Freeze-Thaw Andesite Under Different Confining Pressures
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Yunteng DENG1, 2, 3, Xuanze LIU4, Jun FU1, 2, 3, Han ZHOU1, 4, An CHEN1, Zheng FU2
Affiliations
  • 1.Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
  • 2.Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co., Ltd., Kunming 650051, Yunnan, China
  • 3.Yunnan Provincial Key Laboratory of Geotechnical Engineering and Geohazards, Kunming 650051, Yunnan, China
  • 4.Kunming Engineering & Research Institute of Nonferrous Metallurgy Co., Ltd., Kunming 650231, Yunnan, China
doi: 10.3969/j.issn.0253-6099.2026.03.018
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To address the challenge of freeze-thaw instability of rock slopes in alpine mining areas, the andesite from a slope in a mining area in Ngari of Xizang was taken as the research object. Through freeze-thaw cycle tests, uniaxial compression tests, and triaxial compression tests, the deterioration laws of the mechanical properties of freeze-thaw andesite under different confining pressures were obtained. The results show that with an increase in the number of freeze-thaw cycles, both the compressive strength and shear parameters of the andesite exhibit a decreasing trend, and the deterioration degree gradually increases. Under unconfined conditions, the failure mode of the andesite evolves from splitting failure to mixed splitting-shear failure with an increase in the number of freeze-thaw cycles, accompanied by an increase in cracks. When confining pressure is applied, it enhances the compressive capacity of the rock to a certain extent. As the confining pressure increases, the failure mode gradually transitions from brittle failure to shear-slip failure. After a higher number of freeze-thaw cycles, radial crack propagation develops, accompanied by obvious spalling phenomena.

rock mechanics  /  andesite  /  freeze-thaw cycle  /  confining pressure  /  rock deterioration  /  uniaxial compression  /  triaxial compression  /  shear strength  /  compressive strength
邓云腾, 刘轩泽, 付俊, 周罕, 陈安, 傅峥. 不同围压下冻融安山岩力学性能劣化规律. 矿冶工程杂志, 2026 , 46 (3) : 137 -144 . DOI: 10.3969/j.issn.0253-6099.2026.03.018
Yunteng DENG, Xuanze LIU, Jun FU, Han ZHOU, An CHEN, Zheng FU. Deterioration Laws of Mechanical Properties of Freeze-Thaw Andesite Under Different Confining Pressures[J]. Mining and Metallurgical Engineering, 2026 , 46 (3) : 137 -144 . DOI: 10.3969/j.issn.0253-6099.2026.03.018
Appendix
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Year 2026 volume 46 Issue 3
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doi: 10.3969/j.issn.0253-6099.2026.03.018
  • Receive Date：2025-12-28
  • Online Date：2026-10-08
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  • Received：2025-12-28
Funding
Affiliations
    1.Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
    2.Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co., Ltd., Kunming 650051, Yunnan, China
    3.Yunnan Provincial Key Laboratory of Geotechnical Engineering and Geohazards, Kunming 650051, Yunnan, China
    4.Kunming Engineering & Research Institute of Nonferrous Metallurgy Co., Ltd., Kunming 650231, Yunnan, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
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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