基于不同排弃顺序的露天矿内排土场边坡稳定性研究OA

To address the issue that the disposal schemes of internal dump in open-pit mines lack engineering pertinence,this article takes the internal dump of Heidaigou Open-pit Coal Mine as the research object,and systematically explores the influence mechanism of disposal sequence on slope stability.We design three differentiated disposal schemes,namely"hard-medium hard-soft","medium hard-soft-hard"and"soft-medium hard-hard",use the limit equilibrium method to calculate the slope stability factor of different schemes,and combine the numerical simulation method to analyze the distribution characteristics of slope stress field and displacement field,so as to realize the double verification of scheme rationality.The results show that the"soft-medium hard-hard"scheme has the optimal slope stability coefficient;the hard material layer can play a good role in base support,and with the downward movement of the hard material disposal position,the slope landslide range is reduced and the stability is improved.The study confirms that giving priority to disposing hard materials with better physical and mechanical parameters at the bottom of the dump can significantly improve the slope stability coefficient and reduce the risk of instability.