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Journal of Mining Sciences

2019 year, number 2

Modeling Top Coal Disintegration in Thick Seams in Longwall Top Coal Caving

V. I. Klishin1, V. N. Fryanov2, L. D. Pavlova2, G. Yu. Opruk1
1Institute of Coal, Kemerovo, Russia
2Siberain State Industrial University, Novokuznetsk, Russia
Keywords: угольный пласт, кровля пласта, подкровельная толща, напряжения, дезинтеграция, метод конечных элементов, численный эксперимент, Coal seam, seam roof, trop coal, stresses, disintegration, finite element method, numerical experiment

Abstract

The geomechanical mode, of the powered roof support-top coal-roof rock system is developed. For investigation of disintegration processes in top coal of thick seam, numerical modeling with finite element discretization of a study domain is carried out using the authors’ original code. The computational experiment reveals stress distribution in rock mass, as well as evaluates position, shape and size on uncontrolled caving zones in tope coal.