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Influence of Pillars in Drifting Chamber on Roof Stability During Sublevel Open Stoping with Backfill
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Weihua XIANG1, 2, Yanze LU1, 2, 3, Zhiyi LIU3, 4, 5, Sheguang WANG1, 2, Lijie WANG1, 2, Deqing GAN3, 4, 5, Yanting CHEN1, 2, Zhiqiang YANG1, 2
Mining and Metallurgical Engineering | 2025, 45(3) : 69 - 76
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Mining and Metallurgical Engineering | 2025, 45(3): 69-76
• MINING •
Influence of Pillars in Drifting Chamber on Roof Stability During Sublevel Open Stoping with Backfill
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Weihua XIANG1, 2, Yanze LU1, 2, 3, Zhiyi LIU3, 4, 5, Sheguang WANG1, 2, Lijie WANG1, 2, Deqing GAN3, 4, 5, Yanting CHEN1, 2, Zhiqiang YANG1, 2
Affiliations
  • 1.Shahe Zhongguan Iron Mine Co., Ltd., Hebei Iron and Steel Group, Xingtai 054100, Hebei, China
  • 2.Hebei Technology Innovation Center for Intelligent and Efficient Low-Carbon Mining of Complex Iron Ore, Xingtai 054100, Hebei, China
  • 3.College of Mining Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China
  • 4.Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources, North China University of Science and Technology, Tangshan 063210, Hebei, China
  • 5.Hebei Laboratory of Mining Development and Safety Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China
Published: 2025-06-01 doi: 10.3969/j.issn.0253-6099.2025.03.011
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For the southern area of the Shahe Zhongguan Iron Mine of Hebei Iron and Steel Group in the study, a stability calculation model for the drifting chamber pillars was constructed based on Platts theory of ground pressure and the Kastner Formula. The influence of various factors on the roof stability of the drifting chamber during sublevel open stoping with backfill was discussed, and the roof stability in two options: no pillars retained in the drifting chamber (Option 1) and pillars initially retained and subsequently caved along with the orebody (Option 2) were analyzed by numerical simulations. The results show that when the stope length ranges from 27 m to 45 m, the drifting chamber roof in Option 2 faces a higher risk of instability. With a stope length over 45 m, the roofs in both options are at risk of instability. Option 2 leads to stress concentration within the drifting chamber, with accelerated stress release observed in the roof and side walls. In contrast, Option 1 demonstrates more stable stress release and distribution in the drifting chamber, with a relatively delayed failure time. When the ore rock exhibits poor stability, Option 1 is more conducive to maintaining roof stability.

sublevel open stoping with backfill  /  drifting chamber  /  pillar  /  roof stability  /  sensitivity analysis  /  stope structure  /  roof stress
Weihua XIANG, Yanze LU, Zhiyi LIU, Sheguang WANG, Lijie WANG, Deqing GAN, Yanting CHEN, Zhiqiang YANG. Influence of Pillars in Drifting Chamber on Roof Stability During Sublevel Open Stoping with Backfill[J]. Mining and Metallurgical Engineering, 2025 , 45 (3) : 69 -76 . DOI: 10.3969/j.issn.0253-6099.2025.03.011
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Year 2025 volume 45 Issue 3
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Article Info
doi: 10.3969/j.issn.0253-6099.2025.03.011
  • Receive Date：2024-12-11
  • Online Date：2026-03-19
  • Published：2025-06-01
Article Data
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History
  • Received：2024-12-11
Affiliations
    1.Shahe Zhongguan Iron Mine Co., Ltd., Hebei Iron and Steel Group, Xingtai 054100, Hebei, China
    2.Hebei Technology Innovation Center for Intelligent and Efficient Low-Carbon Mining of Complex Iron Ore, Xingtai 054100, Hebei, China
    3.College of Mining Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China
    4.Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources, North China University of Science and Technology, Tangshan 063210, Hebei, China
    5.Hebei Laboratory of Mining Development and Safety Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, 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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