Surface Rock Displacement Characteristics and Waste Rock Backfill Scheme of Open Pit under the Underground Mining Disturbance

HAN Yansong; ZHANG Jing; ZHOU Zonghong; LIU Yin

doi:10.13779/j.cnki.issn1001-0076.2024.04.010

2024 Vol. 44, No. 4

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Article navigation > Conservation and Utilization of Mineral Resources > 2024 > 44(4): 85-92

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HAN Yansong, ZHANG Jing, ZHOU Zonghong, LIU Yin. Surface Rock Displacement Characteristics and Waste Rock Backfill Scheme of Open Pit under the Underground Mining Disturbance[J]. Conservation and Utilization of Mineral Resources, 2024, 44(4): 85-92. doi: 10.13779/j.cnki.issn1001-0076.2024.04.010

Citation:

HAN Yansong, ZHANG Jing, ZHOU Zonghong, LIU Yin. Surface Rock Displacement Characteristics and Waste Rock Backfill Scheme of Open Pit under the Underground Mining Disturbance[J]. Conservation and Utilization of Mineral Resources, 2024, 44(4): 85-92. doi: 10.13779/j.cnki.issn1001-0076.2024.04.010

Surface Rock Displacement Characteristics and Waste Rock Backfill Scheme of Open Pit under the Underground Mining Disturbance

1.
Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
2.
Heqing Beiya Mining Co. , Ltd. , Dali 671507, China

More Information

Corresponding author: ZHANG Jing, yuanzhongni33@163.com

Received Date: 23 May 2024

Publish Date: 15 August 2024

Abstract

Abstract

The non−pillar sublevel caving method is often used in the black metal mines with open−pit to underground, which can easily cause instability of open−pit slopes and threaten the safety of surrounding buildings in the mining area. Taking the Lijiahe Iron Mine with steep surface slopes and strong terrain cutting as the research object, a detailed numerical model was constructed based on the surface aerial point cloud data and the production plans. The numerical simulation was used to study the surface rock movement characteristics of open−pit pits under the action of continuous underground mining disturbance. In combination with the factors such as terrain, vegetation, crops, and roads, a feasible surface waste rock filling scheme was compared and selected. The results showed that the No.1 mine pit showed local sporadic damage, while the No.2 mine pit was mainly damaged in the north−eastern area under the deep mining and the terrain and distribution of the ore body. The overall surface subsidence stability of the No.1 mine pit was better than that of the No.2 mine pit. Finally, a surface waste rock filling scheme was selected that moves from the sidewall to the centre and then northwards.
- non−pillar sublevel caving method /
- open pit to underground /
- surface rock displacement /
- numerical simulation /
- waste rock backfill

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References

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