DOI: 10.11799/ce201710003
Study on velocity field distribution characteristics of loose coal-rock flow in longwall top-coal caving mining
ZHANG Jin-wang
WEI Wei-jie
Abstract：In order to understand the velocity field distribution characteristics of loose coal-rock flow in longwall top coal caving mining(LTCC), we studied the influence of support presence on the distribution characteristics of velocity using 3D numerical simulation and theoretical analysis based on the loose medium flow field theory. The results indicate that the evolution of the velocity field of loose coal-rock flow can be divided into three stages: secondary loose zone formation stage, stable drawing stage and secondary loose zone destruction stage. The increase of the acceleration of particles near the support beam leads to the prior development of the secondary loose zone towards the front of the support.
Keywords：LTCCloose coal-rock flowvelocity fieldimpact of support
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 12-15 )