Numerical investigation on stability of disused deep mining pit under annular heavy point loading from large space structure
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TU457

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    Abstract:

    Under the increasingly tense situation of land resources, in some mineral resource-based cities, utilization of disused mining pit has been promoted to improve the urban landscape or promote commercial significance. This paper focuses on the rock slope stability problem with reference to a deep mining pit renovation project in Changsha. The development pattern of rock deformation in both natural state and disturbed by construction activities is summarized through finite element analysis. For the rock slope suffering circular point heavy loading, the collaborative interaction between the rock and its overlying structures constitutes the research focus of this study. The results show that the disused deep mining pit is basically in a stable state without engineering activity, the construction disturbance and structural operation loads leave no significance impact to the rock slope stability. However, when the rock wall suffers paroxysmal failure, the local collapse or large deformation seriously endanger the safety of the mining pit and its overlying structures. As for the accidental failure of the foundation pile, it shows less effect on the stability of the rock wall and the building due to the well-behaved annular point foundation distribution.

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仉文岗,吴嘉昊,韩馥柽,何昌杰,李建新,黎泳钦.大空间建筑环形点式重载作用下深废矿坑岩壁变形稳定性数值分析[J].土木与环境工程学报(中英文),2021,43(5):19~26

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  • Received:December 13,2020
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  • Online: July 20,2021
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