Influence of the distribution of external dump on composite slopes stability in Open-pit Coal Mine
DONG Mengmeng
Abstract：In order to explore the influence degree of the distribution of the external dump of the open-pit coal mine in Xinjiang on the composite slope of the stope-dump,this article analyzes the stress distribution law and landslide theoretical model of the composite slope dump-stope,and establishes the composite slope model with different safety distances for stability analysis through FLAC3D software.The results show that the landslide mechanism of the composite slope is that cracks are generated in the radial unloading area of the stope slope under the high stress state of the upper load and continue to develop to penetration.With the increase of the distance,the"pressure transfer"effect of the dump is gradually weakened,and when the distance is 300 m,the external dump has almost no effect on the slope of the quarry.The slope stability is 1.44,which meets the long-term safety requirements.Therefore,we consider that the safe distance between the quarry and the external dump is 300 m.
Keywords：slope stabilitycomposite slopenumerical simulationFLAC3Dsliding mode
Publication Date：2024-02-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 17-21 )