Technical gazette, Vol. 22 No. 3, 2015.
Original scientific paper
https://doi.org/10.17559/TV-20150428103311
Research on the representation of granular vertical size grading and numerical simulation method with the typical waste rock site
Wang Guang-jin
; State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China
Kong Xiang-yun
; Kunming University of Science and Technology, Faculty of Land Resource Engineering of KUST, Kunming 650093, China
Yang Chun-he
; State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China
Abstract
The vertical size grading of granular, as a typical characteristic with the high single-bench waste rock site, is an important factor affecting the slope stability of waste rock site. On the basis of field investigation of granular size distribution with the typical waste rock site, we used the Cellular Automaton method to develop the HHC-Granular model which could describe the phenomenon of apparent vertical size grading. Moreover, the slope model was constructed and size grading was considered with the aid of Flac3D software based on the data collected from the typical waste rock site. The slope stability of various piling up patterns had been analyzed using the constructed slope model. The results indicated that at the top platform of waste rock site appeared the obvious tension cracks and slippage position of present slope was in the middle of waste rock site. The present slope was in the stage of temporarily steady. To adopt full overlay dump of multi-bench, the displacement vector of calculation images showed that the top of waste rock site was the subsidence and the horizontal distortion appeared at its bottom. The slope failure mode was that at the top platform of waste rock site appeared the cracks and its bottom showed the arc slippage. When the strength characteristics of granular were considered as the only factor in the slope stability analysis, the vertical size grading of high-bench waste rock site was helpful to slope stability.
Keywords
HHC-Granular model; slope stability analysis; vertical size grading; waste rock site
Hrčak ID:
139752
URI
Publication date:
15.6.2015.
Visits: 1.776 *