Discrete element modeling of gravity flow of broken rocks in the technology of longwall top coal caving

International Scientific Conference "Knowledge-based technologies in development and utilization of mineral resources"

Klishin, S.V.^1 ; Klishin, V.I.^2 ; Opruk, G. Yu.^2

Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, 54 Krasny ave 54, Novosibirsk

630091, Russia^1

Institute of Coal, Federal Research Center of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, 10 Leningradsky ave, Kemerovo

650065, Russia^2

关键词: Corrugated surfaces;    Discharge regimes;    Discrete element modeling;    Force interaction;    Longwall top-coal caving;    Sub-level caving;    Thick coal seam;    Underground mining;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/206/1/012007/pdf
DOI  :  10.1088/1755-1315/206/1/012007

来源: IOP

【 摘 要 】

The authors perform 3D discrete element modeling of pre-broken coal and dirt discharge in underground mining with sublevel caving of thick coal seams. The process of force interaction between rocks and powered roof support is analyzed. The difference between the discharge regimes with feeders equipped with smooth and corrugated surfaces is demonstrated. The mass flow of coal during discharge is shown.