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Experimental Research of Combined Ore-Drawing Scheme for Orebody in Confined Space During Sublevel Caving Without Sill Pillar
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Baohui TAN1, Weiguo LONG2, Zhen GONG2, Zhigui ZHANG1, Xingming CHEN1, Qiang ZHU1
Mining and Metallurgical Engineering | 2023, 43(2) : 10 - 15
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Mining and Metallurgical Engineering | 2023, 43(2): 10-15
• MINING •
Experimental Research of Combined Ore-Drawing Scheme for Orebody in Confined Space During Sublevel Caving Without Sill Pillar
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Baohui TAN1, Weiguo LONG2, Zhen GONG2, Zhigui ZHANG1, Xingming CHEN1, Qiang ZHU1
Affiliations
  • 1.School of Environment and Resources, Southwest University of Science and Technology, Mianyang 221116, Sichuan, China
  • 2.Longshou Mine of Jinchuan Group Co Ltd, Jinchang 737100, Gansu, China
Published: 2023-04-01 doi: 10.3969/j.issn.0253-6099.2023.02.003
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The upper middle section in the West 2#Mining Area of Jinchuan Longshou Mine, with the mining method changed from underhand cut-and-fill mining to sublevel caving without sill pillar, was taken as an example for studying extraction of the orebody in a confined space from sublevels of stope. A combined scheme was prepared with different ore-drawing method for each sublevel. As for the first and second sublevels, the total amount of mined ore in the ore drawing is controlled to ensure the safe caving of roof and forming of overburden. And ore drawing by controlling ore dilution is adopted for the third sublevel for avoiding ineffective dilution, so as to achieve high-quality ore recovery. For the fourth sublevel, a scheme of ore drawing by controlling ore dilution in the normal stope drift plus ore-drawing by controlling cutoff grade in an auxiliary extraction drift is designed to achieve a full and effective ore recovery. Experiments were then performed with three groups of different ore-drawing schemes, and results show that a combined ore-drawing scheme can achieve safe and effective mining of orebody in a confined space, but also has a significant advantage in controlling loss and dilution of ores, which can bring the mine good economic benefit from mining. It is concluded that this research can provide scientific theory and technical guidance for the following engineering practice.

stoping of orebody in a confined space  /  sublevel caving without sill pillars  /  ore drawing  /  ore loss and dilution
Baohui TAN, Weiguo LONG, Zhen GONG, Zhigui ZHANG, Xingming CHEN, Qiang ZHU. Experimental Research of Combined Ore-Drawing Scheme for Orebody in Confined Space During Sublevel Caving Without Sill Pillar[J]. Mining and Metallurgical Engineering, 2023 , 43 (2) : 10 -15 . DOI: 10.3969/j.issn.0253-6099.2023.02.003
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Year 2023 volume 43 Issue 2
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Article Info
doi: 10.3969/j.issn.0253-6099.2023.02.003
  • Receive Date：2022-11-03
  • Online Date：2026-03-05
  • Published：2023-04-01
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  • Received：2022-11-03
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Affiliations
    1.School of Environment and Resources, Southwest University of Science and Technology, Mianyang 221116, Sichuan, China
    2.Longshou Mine of Jinchuan Group Co Ltd, Jinchang 737100, Gansu, 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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