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Failure Law of Rock Masses in Transition from Open-Pit to Underground Mining in Yanqianshan Iron Mine
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Zhongyu WANG, Yongchao JIANG, Ruotong JIA, Aopeng JIANG, Zhonghui CHEN
Mining and Metallurgical Engineering | 2025, 45(1) : 14 - 20
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Mining and Metallurgical Engineering | 2025, 45(1): 14-20
• MINING •
Failure Law of Rock Masses in Transition from Open-Pit to Underground Mining in Yanqianshan Iron Mine
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Zhongyu WANG, Yongchao JIANG, Ruotong JIA, Aopeng JIANG, Zhonghui CHEN
Affiliations
  • School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China
Published: 2025-02-01 doi: 10.3969/j.issn.0253-6099.2025.01.003
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In the east side of Yanqianshan Iron Mine of Anshan Iron and Steel Company, the transition from open-pit to underground mining causes failure and collapse of rock slope. In order to solve this problem, tests were performed by adopting numerical simulation and the base friction model to analyze the failure process and failure mode. The different collapse angles at different mining stages were explored, and development process of collapse area was summarized in terms of fissures. It is found that as mining operation proceeds, the collapse angle is reducing due to disturbance of mining activity; the collapse area undergoes four stages, including progressive fissure enrichment, deformation during aging, growth of slip surface, and collapse formation; and the slope failure in the east side of Yanqianshan Iron Mine is predominantly attributed to the sliding crack model of deformation.

Yanqianshan iron mine  /  transition from open-pit to underground mining  /  failure of rock mass  /  collapse  /  fissure propagation  /  slope instability  /  base friction model test
Zhongyu WANG, Yongchao JIANG, Ruotong JIA, Aopeng JIANG, Zhonghui CHEN. Failure Law of Rock Masses in Transition from Open-Pit to Underground Mining in Yanqianshan Iron Mine[J]. Mining and Metallurgical Engineering, 2025 , 45 (1) : 14 -20 . DOI: 10.3969/j.issn.0253-6099.2025.01.003
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doi: 10.3969/j.issn.0253-6099.2025.01.003
  • Receive Date：2024-08-26
  • Online Date：2026-03-17
  • Published：2025-02-01
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  • Received：2024-08-26
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    School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, 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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