DOI: 10.11799/ce201705001
Negative pillar design technology and its application in stagger arrangement mining method
ZHAO Jing-Li
LIU Bao-Zhu
Abstract：Fully mechanized mining has been using the plane roadway system,which arranges the adjacent working face roadways in the same layer,and usually sets rectangular coal pillar between working face.In coal industry project approval,mining with coal pillars smaller than 5 meters is generally regarded as non-pillar mining.Aiming at the mining problems such as great coal loss at the face ends,driving difficulty with roadway arranged below the top coal roadway layout,self-combustion tendency of broken top coal,and gas drainage difficulty,and to achieve complete non-pillar mining,the negative coal pillar design technology was proposed based on the design principle of stagger arrangement mining method.According to the different angle of coal seam,two types of negative stagger coal pillar were designed and successfully applied.The results show that,the negative stagger coal pillar design is conducive to the realize non-pillar mining,upgrade the mining technology.
Keywords：stagger arrangementnon-pillar miningdesign technologythree-dimensional miningnegative coal pillar
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( 1-3,7 )