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Optimization of Stope Structural Parameters for Deep Complex Orebodies Beneath Abandoned Open Pits
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Zhaoming QIAN1, 2, Bin ZHENG1, 2, Laixin ZHANG1, 2, Jian OUYANG3, Xianyang QIU3, Rihong CAO3, Xiuzhi SHI3
Mining and Metallurgical Engineering | 2026, 46(3) : 122 - 129
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Mining and Metallurgical Engineering | 2026, 46(3): 122-129
• MINING •
Optimization of Stope Structural Parameters for Deep Complex Orebodies Beneath Abandoned Open Pits
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Zhaoming QIAN1, 2, Bin ZHENG1, 2, Laixin ZHANG1, 2, Jian OUYANG3, Xianyang QIU3, Rihong CAO3, Xiuzhi SHI3
Affiliations
  • 1.China Nonferrous Metal Mining (Group) Co., Ltd., Beijing 100029, China
  • 2.Kambove Mining SAS, Likasi 999059, Katanga, DRC
  • 3.School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China
doi: 10.3969/j.issn.0253-6099.2026.03.016
Outline
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To address the optimization of stope structural parameters for the deep complex geological orebody beneath the abandoned MSESA open pit in the DRC, an analytical method was proposed, integrating the 3D rock mass quality Q-value model and the Mathews stability graph method. Through rock mechanics tests, a 3D rock mass quality Q-value model of the mining area was constructed. Based on the Mathews stability graph method, the quantitative relationship between the stope hydraulic radius and the stability factor was established, and reasonable stope structural parameters under the condition of the critical allowable hydraulic radius were selected. The results show that for the area north of the+500 exploration line, where the sublevel open stoping with subsequent backfilling method is adopted, the structural parameters should be 35 m × 8 m × 45 m when the stope is arranged perpendicular to the strike under unsupported conditions, and 20 m × 9 m × 45 m when arranged along the strike. In the area south of the+500 exploration line, roof support is required and the optimal stope structural parameters should be 17 m × 8 m × 15 m.

open-pit to underground transition  /  deep mining  /  open pit  /  mining method  /  sublevel open stoping with subsequent backfilling  /  stope structure  /  Mathews stability graph method  /  rock mass quality classification  /  stope stability  /  Q-system graph method
钱兆明, 郑斌, 张来鑫, 欧阳剑, 邱贤阳, 曹日红, 史秀志. 废弃露天坑下深部复杂矿体采场结构参数优化研究. 矿冶工程杂志, 2026 , 46 (3) : 122 -129 . DOI: 10.3969/j.issn.0253-6099.2026.03.016
Zhaoming QIAN, Bin ZHENG, Laixin ZHANG, Jian OUYANG, Xianyang QIU, Rihong CAO, Xiuzhi SHI. Optimization of Stope Structural Parameters for Deep Complex Orebodies Beneath Abandoned Open Pits[J]. Mining and Metallurgical Engineering, 2026 , 46 (3) : 122 -129 . DOI: 10.3969/j.issn.0253-6099.2026.03.016
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Year 2026 volume 46 Issue 3
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Article Info
doi: 10.3969/j.issn.0253-6099.2026.03.016
  • Receive Date：2025-12-06
  • Online Date：2026-10-08
Article Data
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  • Received：2025-12-06
Funding
Affiliations
    1.China Nonferrous Metal Mining (Group) Co., Ltd., Beijing 100029, China
    2.Kambove Mining SAS, Likasi 999059, Katanga, DRC
    3.School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, 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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