文献类型：期刊文献

英文题名：Similitude model experiments for studying slipbuckling failures in high and steep side slopes set along the bedding plane of layered rocks

作者：Wen, Yiming Cheng, Yong Liang, Wei Chen, Chong Zeng, Xiaoyan Sun, Wei Lin, You

第一作者：Wen, Yiming

通信作者：Liang, Wei

机构：[1] Mining Engineering Faculty, Kunming Metallurgy College, Kunming, 650 033, China; [2] Institute of Mining Engineering, Guizhou Institute of Technology, Guizhou, 550 003, China; [3] Yunnan ChiHong Zn and Ge Co, Qujing, 655 011, China; [4] Continuous Education College, Kunming Medical University, Kunming, 650 031, China; [5] Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, 650 093, China

第一机构：Mining Engineering Faculty, Kunming Metallurgy College, Kunming, 650 033, China

年份：2017

卷号：65

期号：10

起止页码：515-520

外文期刊名：Journal of Mines, Metals and Fuels

收录：EI(收录号：20174804455882);Scopus(收录号：2-s2.0-85034847282)

基金：This work was funded by the project supported by Youth Foundation of Yunnan Province (no. 2013FD059).

语种：英文

外文关键词：Buckling - Compressive strength - Excavation - Plaster - Rocks

摘要：As the scale of open pit mining and mining intensity have increased continuously over time, the stability of high and steep side slopes have become a key issue that must be addressed in open pit mines. A number of cases have shown that high and steep side slopes with bedded structures are highly susceptible to failure, and these failures may lead to significant damage and destruction. In this work, indoor modelling experiments were performed to study slip-buckling failures in high and steep side slopes set along the bedding plane of layered rocks. Here, experimental similarity criteria were derived according to similarity principles to produce an accurate match with the subject of this study and to select similarity constants. River sand, plaster, and barite were selected as equivalent materials in this experiment, and matching tests were performed. Fuzzy comprehensive evaluation was used to determine the optimal matching scheme on the basis of prototype similarity and physicomechanical parameters including density, compressive strength, elastic modulus, and Poisson's ratio. The model was filled and constructed through layered filling and tamping, and observation points were installed throughout the model. Based on the subject selected for this study and dynamic excavation processes in mining simulations, we observed deformations of the model that occurred during excavation and the application of a load by a hydraulic servo loading system set on the top of the model. Through analyses of the results, it was found that rocks on the upper part of the slope slipped along the bedding, while slip-buckling failure occurred at the foot of the slope. Finally, the most dangerous slippage surface was identified as a composite surface with flat and arced surfaces.