Author:
Cao Bo,Wang Jian,Guo Xiaobing,Li Wenlu,Liu Guangwei
Abstract
AbstractTo address the problem of excessive local secondary stripping between adjacent mining areas in open pit mines caused by internal row raising, a multivariate function was fitted to the model of the main mining seam of Zhundong open pit coal mine in Xinjiang, and the different locations of the end gang of the second mining area were divided into multiple sections at certain step sizes and calculated by integration, resulting in stripping ratios for each section, which were fitted to a stripping ratio curve. The optimal location of the mining area boundary was found to be 55 m westward offset from the mining area boundary in the inner row of the raised section, and numerical simulations based on the strength reduction method were applied to analyse the slope stability of the end gang at this location. The results of the study show that the analysed slope meets the stability requirements and the optimised new boundary avoids the stripping of approximately 65,837,376 m3 of economically unreasonable section.
Publisher
Springer Science and Business Media LLC
Reference20 articles.
1. Cheskidov, V. I. & Reznik, A. V. Specifics of internal overburden dumping in open pit mining. J. Min. Sci. 58, 227–233. https://doi.org/10.1134/s1062739122020065 (2022).
2. Guo, T. S. et al. Optimization of land saving and loss reducing and slope stability variation patterns in Open-Pit mine. Geofluids 2021, 10. https://doi.org/10.1155/2021/6620235 (2021).
3. Selyukov, A. V. Technological significance of internal dumping in open pit coal mining in the Kemerovo region. J. Min. Sci. 51, 879–887. https://doi.org/10.1134/s1062739115050039 (2015).
4. Ma, L., Li, K., Xiao, S. & Ding, X. Optimisation study on coordinated mining model of coal reserves buried between adjacent surface mines. Int. J. Oil Gas Coal Technol. 16, 283–297 (2017).
5. Bai, R., Li, H. & Liu, G. W. State optimization during transition of open-pit mine in adjacent inclined composite coal seam. J. Liaoning Tech. Univ. (Natural Science) 673–679 (2018).