DOI: 10.11799/ce201705011
Twice grouting support of multiplex roadway in large height mining face
JIA Yong-qiang
CHEN Hong-xu
Abstract：Aiming at the large deformation and controlling difficulty in multiplex roadway with large mining height,the deformation law of multiplex roadway was analyzed through filed measurement,the surrounding rock coordination theory was proposed,the action mechanism between surrounding rock deformation and grouting support opportunity was explained,and a twice grouting support test was carried out using new grouting material.Results show that,multiplex roadway can be divided into advance impact zone,initial deformation zone,serve deformation zone,stabilizing zone,stable zone;according to coordination support theory,grouting support should be applied at initial deformation stage,using twice grouting support at the front and back of the working face,the deformation was decreased by more than 50％after twice grouting support.
Keywords：large height mining facemultiplex roadwaycoordinated supportnew grouting materialtwice grouting support
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：3( 33-35 )