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Optimization of Mining Sequence for High-Level Stope with Gently-Dipping and Extra-thick Orebody
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Deqing GAN1, 2, 3, 4, Qi MENG1, 2, 3, 4, Zhiyi LIU1, 2, 3, 4, Yanze LU1, 2, 3, 4, 5
Mining and Metallurgical Engineering | 2024, 44(5) : 28 - 34
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Mining and Metallurgical Engineering | 2024, 44(5): 28-34
• MINING •
Optimization of Mining Sequence for High-Level Stope with Gently-Dipping and Extra-thick Orebody
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Deqing GAN1, 2, 3, 4, Qi MENG1, 2, 3, 4, Zhiyi LIU1, 2, 3, 4, Yanze LU1, 2, 3, 4, 5
Affiliations
  • 1.School of Mining Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China
  • 2.Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources, North China University of Science and Technology, Tangshan 063210, Hebei, China
  • 3.Hebei Technical Innovation Center of Green and Intelligent Mining of Mines, North China University of Science and Technology, Tangshan 063210, Hebei, China
  • 4.Hebei Provincial Key Laboratory of Mining Development and Security Technology, North China University of Science and Technology, Tangshan 063210, Hebei, China
  • 5.HBIS Group Shahe Zhongguan Iron Ore Co., Ltd., Xingtai 054100, Hebei, China
Published: 2024-10-01 doi: 10.3969/j.issn.0253-6099.2024.05.006
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In order to balance productivity against safety in the mining of high-level stope with gently-dipping and extrathick orebody, an iron mine adopting sublevel open stoping with backfill was taken as an example to optimize the mining sequence. Firstly, pillars was determined to at a reasonable spacing from 14.2 m to 47.2 m based on the theory of bearing capacity of pillars. Secondly, according to stope structure parameters, the pillars were designed to be 15 m, 30 m and 45 m in thickness, respectively. An orebody model was also established with FLAC3D and then was used to analyze the roof subsidence and pillar stability based on comparison of each mining scheme. Finally, a judgment matrix of mining sequence was constructed based on analytic hierarchy process and fuzzy comprehensive evaluation method, with both factors of safety and productivity taken into consideration in the numerical simulation. The comprehensive membership degrees of those three schemes were calculated to be 0.86, 0.79 and 0.80, respectively, and pillars in the best scheme were determined to be in the thickness of 15 m. The results of an industrial experiment have proven that this scheme can ensure stope with relative stability while achieving the maximum production capacity.

gently-dipping orebody  /  extra-thick orebody  /  mining sequence  /  sublevel open stoping with backfill  /  pillar stability  /  numerical simulation  /  high-level stope  /  pillar thickness
Deqing GAN, Qi MENG, Zhiyi LIU, Yanze LU. Optimization of Mining Sequence for High-Level Stope with Gently-Dipping and Extra-thick Orebody[J]. Mining and Metallurgical Engineering, 2024 , 44 (5) : 28 -34 . DOI: 10.3969/j.issn.0253-6099.2024.05.006
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Year 2024 volume 44 Issue 5
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Article Info
doi: 10.3969/j.issn.0253-6099.2024.05.006
  • Receive Date：2024-04-11
  • Online Date：2026-03-17
  • Published：2024-10-01
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  • Received：2024-04-11
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Affiliations
    1.School of Mining Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China
    2.Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources, North China University of Science and Technology, Tangshan 063210, Hebei, China
    3.Hebei Technical Innovation Center of Green and Intelligent Mining of Mines, North China University of Science and Technology, Tangshan 063210, Hebei, China
    4.Hebei Provincial Key Laboratory of Mining Development and Security Technology, North China University of Science and Technology, Tangshan 063210, Hebei, China
    5.HBIS Group Shahe Zhongguan Iron Ore Co., Ltd., Xingtai 054100, 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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