Investigation of coal discharge modes on brassboards of powered roof support unit

Challenges for Development in Mining Science and Mining Industry

Klishin, V.I.^1 ; Varfolomeev, E.L.^1 ; Borisov, I.L.^1 ; Klishin, S.V.^2

Institute of Coal, Federal Research Center of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia^1

Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia^2

关键词: Discharge mode;    Flat seams;    Gravity flows;    Top-coal caving;    Underground mining;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/262/1/012029/pdf
DOI  :  10.1088/1755-1315/262/1/012029

来源: IOP

【 摘 要 】

Physical and analytical modeling of caved top coal discharge by adjustable feeders on armored face conveyor during underground mining of thick flat seams has been performed. The process of top coal caving is studied using laboratory installation with the feeders operating in wave and areal modes. Based on 3D discrete element method (DEM), gravity flow of coal and its interaction with the powered roof support unit is modeled numerically.