Abstract
The mechanical problem in underground mining is that the stope and laneway are always in a state of dynamic evolution, induced by stress adjustment that is caused by excavation and shocks. The dynamic evolution induces a crack field in the wall rock expansion and in the end it caves in. So the mechanics problem in mining is different from other rock engineering problems, such as in powerhouse construction of a hydroelectric power station, traffic tunneling, national defense engineering of rock, etc., which will be firmly supported as soon as they are excavated. However, in mining, the evolution of the crack field and the caving in of the rock are fully used in ore extraction and ground pressure control, such as the mining methods of block caving and long wall mining. In the block caving method, the mining block is undercut near its bottom in order to expose a large free surface near which the ore is in a state of tension, so that cracks in the ore body expand, run through and induce ore caving, as shown in Fig. 14.1 and Fig. 14.2 (Brown, 2003).
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References
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© 2012 Zhejiang University Press, Hangzhou and Springer-Verlag Berlin Heidelberg
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Yu, MH., Li, JC. (2012). Underground Mining. In: Computational Plasticity. Advanced Topics in Science and Technology in China. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-24590-9_14
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DOI: https://doi.org/10.1007/978-3-642-24590-9_14
Publisher Name: Springer, Berlin, Heidelberg
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