Theoretical Research on Cavebody Shapes of Top Coal Caving in Fully-Mechanized Caving Face
SONG Xiao-bo
WANG Peng-yu
Abstract：In order to describe top coal caving shapes,the broken top coal was regarded as random flowing loose medium.By using PFC2d software,the two-dimensional model in transverse section was established,and the shapes of caving top coal could be worked out through discrete element iteration method.Based on the boundary spherule coordinate,the two-dimensional function of caving top coal was deter-mined by carrying on data fitting to the two-dimensional equation of random medium theory.The top coal caving was a three-dimensional process.The paper assumed that the process of top coal caving were mutual independent in transverse section and longitudinal section,ac-cording to the boundary spherule coordinate,the three-dimensional equation of drawn top coal could be determined by data fitting to the three-dimensional equation of random medium theory.It presented that the random medium theory was feasible to top coal caving study for the function image and the simulated drawn top coal shapes being basically identical.It could determine rationally coal caving parameters during production process.
Keywords：fully-mechanized caving facerandom medium theorycavebody of top coaldiscrete element iteration method
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 12-14 )