DOI: 10.11799/ce201704017
Coal drawing process optimization of fully-mechanizedtop-coal caving in extra-thick coal seam
DENG Wei-yuan
KANG Tian-he
Abstract：To improve the extra-thick coal seam fully-mechanized caving top-coal recovery,decrease the rate of waste rock,based on the background in 23103 fully-mechanized working face in Xiegou Coal Mine coal mine,numerical simulation was applied combining with field measurement,to optimize the reasonable interval and the way of coal drawing.Simulation results show that,compared with one-cut-drawing and three-cut-drawing,the top-coal recovery in two-cut-caving one increases by 1.9% and 6.2%,respectively,more gangue is drawn in one-cut-drawing while coal is lost in three-cut-drawing;in single round coal drawing,top-coal recovery rate is 75.2%,gangue content is 12.6%,while in the ordered and interval double round coal drawing,the top-coal recovery rate are 80.6% and 79.4%,and gangue content are 9.1% and 9.6% respectively.The filed measurement show that the ordered double round coal drawing after two cuts is conducive to reduce the gangue content and increase the top-coal recovery,which verifies the simulation test results.
Keywords：extra-thick coal seamcoal drawing intervalcoal drawing methodlong wall top-coal caving
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( 52-55 )