The influences of mining subsidence on the ecological environment and public infrastructure: a case study at the Haolaigou Iron Ore Mine in Baotou,China |
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| Authors: | Xiong Wu Xiao-Wei Jiang Yu-Fu Chen Hong Tian Neng-Xiong Xu |
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| Institution: | (1) School of Water Resources and Environment, China University of Geosciences, 100083 Beijing, China;(2) School of Engineering Technology, China University of Geosciences, 100083 Beijing, China |
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| Abstract: | The scope and extent of mine subsidence caused by exploitation of metal ores are usually low. However, in some cases, owing
to such factors as special geological conditions in ore body, backward mining technology and unsound management systems, exploitation
of metal ores would also lead to a large area of mine subsidence, causing great damages to the mining environment and infrastructure.
A serious mine subsidence happened in January 2007 at the Haolaigou Iron Ore Mine has caused a huge collapse pit on the earth’s
surfaces. This provides a suitable place to study the influence of mine subsidence. Based on former research results, a 3D
geological model is constructed using the ROCK MODEL software developed by authors’ group. Based on in situ geological conditions,
the range of orebody mining and the physical and mechanical parameters of rock and soil mass were determined by inverse analysis.
Creep analysis of the collapse pit was also performed. Furthermore, the elastoplastic and creep of the secondary collapse
were computed, and the final range of the collapse pit was predicted. Finally, the influences of mining subsidence on the
ecological environment and public infrastructure are discussed and control measures were proposed. The results indicate that
the collapse pit would not affect the road even if creep is considered; however, the secondary collapse would influence the
road. So the collapse pit should be dealt with as soon as possible. |
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