Case history of controlling a landslide at Panluo open-pit mine in China |
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| Authors: | Zuoan Wei Guangzhi Yin Ling Wan Louyan Shen |
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| Institution: | (1) The Key Laboratory of the Exploitation of Southwest Resources and the Environmental Hazards Control Engineering, Ministry of Education, Chongqing University, Chongqing, 400044, China;(2) College of Resource and Environmental Science, Chongqing University, Chongqing, 400044, China;(3) Nanchang Design and Research Institute of Non-Ferrous Metal, Nanchang, 330002, China |
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| Abstract: | Controlling of landsides safely and economically is a great challenge to mine operators because landslides are major geological
problems especially in open-pit mines. In this paper, a case history at Panluo open-pit mine is presented in detail to share
the experiences and lessons with mine operators. Panluo open-pit mine is located in the southwestern Fujian province of China.
It is the largest open-pit iron mine in the Fujian province and was planned in 1965 and is in full operation from 1978. In
July 1990, an earthquake of magnitude 5.3 in Taiwan Strait and big rainstorms impacted the mine slope, causing tension cracks
and rather large-scale failures, and forming a U-shaped landslide. Total potential volume was estimated to be up to 1.0 × 106 m3. This directly threatened the mine production. In order to protect the mine production and the dwellers’ safety around, a
dynamic comprehensive method was implemented including geotechnical investigations, in-situ testing and monitoring, stability
analysis, and many mitigation and preventive measures. These measures slowed down the development and further occurrence of
the landslide. The results showed that the landslides were still active, it was slowed with the control measures and moved
rapidly with rainfall and mining down. However, no catastrophic accidents occurred and the pit mining was continued till it
was closed at the elevation of 887 m in 2000. As a successful case of landslide control at an open-pit mine for 10 years,
this paper reports the controlling measures in details. These experiences of landslide control may be beneficial to other
similar mines for landslide control. |
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| Keywords: | Open-pit mine Slopes stability Landslides Mining management Reclamation Panluo |
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