DOI: 10.11799/ce201704016
One-off retracting technology of supports for triangle coal recoveryin longwall top-coal caving face
HE Shuang-long
ZHANG Bin-bin
Abstract：Aiming at the triangle coal recovery in later period of longwall top-coal caving,based on the background of No.25011 working face in Shanzhai Coal Mine,we made a scheme that continuous recovery of short face formed by one-off retraction of supports after original terminal line was mined,and studied the retracting technology,location of auxiliary return airway and conterminousness with the working face.The result showed that the conterminousness between auxiliary return airway and longwall caving face could be achieved accurately by field measurements and calculation,as well as leading guide holes.Depending on this technology,retracting time decreased to 25 days,and recovery of triangle coal increased to 59.2%.
Keywords：longwall top-coal caving facetriangle coalone-off retraction of supportsretracting technologyrecovery of resources
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( 49-51,55 )