Critical sizes of cone-shaped opening in open mining

Challenges for Development in Mining Science and Mining Industry

Chanyshev, A.I.^1^2 ; Belousova, O.E.^1 ; Efimenko, L.L.^2 ; Lukyashko, O.A.^1

Chinakal Institute of Mining, Siberian Branch Russian, Academy of Sciences, Novosibirsk, Russia^1

Novosibirsk State University of Economics and Management, Novosibirsk, Russia^2

关键词: Cone-shaped;    Critical sections;    Critical size;    Failure surface;    Horizontal section;    Maximum pressure;    Open mining;    Vertical pressure;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/262/1/012010/pdf
DOI  :  10.1088/1755-1315/262/1/012010

来源: IOP

【 摘 要 】

In case of unstable cone-shaped pitwalls and dumps, the overlying rock weight is of importance. Different weight of overlying rocks generates different vertical pressures per horizontal sections of pits and dumps. In case that the type of a failure surface is known for the present slop of pitwall or dump, it is possible to detect a critical section of the maximum pressure. The location of the critical section is governed by the height and the bottom radius of a pit or a dump. This study relates the destruction zone location with the height and bottom radius of open pits (dumps). The results of the theoretical and experimental studies are reported.