DISCRETE ELEMENT MODELING OF DISCHARGE FLOW OF GRANULAR MEDIA FROM UNDERGROUND CHAMBER WITH ACCOUNT OF THE NON-SPHERICAL PARTICLE FORM
S. V. Klishin
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Подземная разработка месторождений, площадный выпуск, горная масса, самообрушение, численное моделирование, метод дискретных элементов, Underground mining, discharge flow, rock mass, self-caving, numerical modeling, discrete element method
Abstract
Based on the Discrete Element Method a 3D numerical simulation of the process of discharge flow of coal mass during the underground mining of thick seams using a self-caving technology has been performed. Discrete elements are clusters composed of three spherical particles with a preset radius distribution. When calculating the tangential forces acting between the discrete elements, dry friction and rolling resistance are taken into account. The kinematic pictures of the rock mass flow depending on the number and location of the outlets are given, with determined zones of their mutual influence.
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