文献类型：期刊文献

英文题名：Investigation on the disaster mechanism and dynamic evolution of a dump slope using experimental and numerical methods: Case study, Kunyang phosphate mine, China

作者：Li, Xiaoshuang[1,2,3];Li, Qihang[4,5];Hou, Guoqing[2];Zhang, Feng[2];Lu, Jun[2]

机构：[1]Changzhou Univ, Sch Urban Construct, Changzhou, Peoples R China;[2]Shaoxing Univ, Sch Civil Engn, Shaoxing, Peoples R China;[3]Qilu Inst Technol, Coll Civil Engn, Jinan, Peoples R China;[4]Chongqing Univ, Sch Resources & Safety Engn, Chongqing, Peoples R China;[5]Chongqing Univ, Sch Resources & Safety Engn, Chongqing 400044, Peoples R China

年份：2023

外文期刊名：GEOLOGICAL JOURNAL

收录：SCI-EXPANDED(收录号：WOS:001109488000001)、、Scopus(收录号：2-s2.0-85178016359)、WOS

基金：I would like to thank the editor and reviewers for their expert advice.

语种：英文

外文关键词：dump; packing density; phosphate ore; rainfall infiltration; sliding disaster

外文摘要：Dump slope is mainly attributed to the deep excavation of a mine. In the present work, the dump in Kunyang phosphate mine located in Sanjia Village was investigated. The geographic and geologic settings were first studied according to the field investigation. Aiming at the actual dump scenario, a rainfall system was designed to simulate the process of dump instability induced by rainfall. The novelty lies in conducting comprehensive tests on fundamental parameters, including water content, particle size, compactness, and engineering mechanical properties, through analogous simulation experiments. In addition, the SLIDE software was adopted to analyse the dumps in each mining area and subsequently determine the sliding disaster mode of the dumps in Kunyang phosphate mine. The comparative analysis of the dumps in these different mining areas showed that the dump in No. 6 mining area has a greater factor of safety (FS) and better stability (instability will not occur). Secondly, the stability of the dumps in No. 2, No. 3 and No. 4 is better than that in No. 5, but they have not reached the ultimate equilibrium state (instability will not occur). Nevertheless, the FS of the dump in No. 1 mining area approached or even fell below 1. Thus, it is predicted that a small-scale landslide disaster may have occurred (instability). Moreover, the dynamic evolution characteristics of dump disasters with different accumulation densities were revealed by model device tests. Finally, the obvious tube surge phenomenon before sliding was observed. By combining physical experiment with numerical simulation (SLIDE), we analysed the stability of dumps in six mining areas step by step. Finally, we got the dynamic evolution characteristics of dump disasters with different density.image