Numerical simulation study on fully-mechanized top coal caving technology of composite coal seam with interbedded gangue
Man Jiankang
Abstract：Under the fully-mechanized top coal caving mining method,in order to reduce the loss of coal resources and improve the top coal release rate,it is necessary to determine a reasonable coal caving technology.Taking the No.8 coal seam,which is the main mining area of a certain coal mine,as the engineering background,the PFC numerical simulation method was applied to analyze the top coal ca-ving under different coal caving technology conditions for its complex structure with interbedded gangue layers.Combined with actual production,the coal caving parameters were determined as a mining height of 2.5 meters and a coal caving step spacing of 1.2 meters,and the fully-mechanized top coal caving mining technology with multiple rounds of interval sequential coal caving was adopted.Appli-cation practice has shown that the fully-mechanized top coal caving technology under this condition is conducive to achieving safe and efficient production of working face.
Keywords：interbedded gangue layerfully-mechanized top coal caving technologyPFC numerical simulationcomposite coal seam
Publication Date：2026-02-28
Online Publishing Date：2026-04-02(First online date of this platform, not the publication date of the document)
Pages：5( 62-66 )