Determination of support working resistance of top coal caving in extra thick coal seam
Abstract：Based on the theoretical analysis,the roof structure and support loading of top coal caving in extra thick coal seam was studied.According to the roof structure of top coal caving in extra thick coal seam is ＂cantilever beam-articulated rock beam＂,the new concept and criterion of immediate roof and main roof were given,the analytic expression of support working resistance with top coal caving in extra thick coal seam was concluded and verified by examples,and dynamic loading characteristics and adaptability of selected support were analyzed.The results show that the selected support has high reliability,running reasonability,high utilization rate and better adaptability.
Keywords：extra thick coal seamlong wall with top coal cavingstructure of 'cantilever beam-articulated rock beam'immediate roofmain roof
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 737-742 )