Research on the grouting thickness of the bottom plate of the collapse column in the fully mechanized caving working face
YANG Changyi
ZOU Guanghua
SHI Haoyu
XIN Chubing
KONG Dechuang
FAN Qingzheng
Abstract：Aiming at the comprehensive release working face over the trapped column and other geological tec-tonic zone is very easy to appear coal wall slice gangs,shelf before the fall,stent into the bottom plate and other production problems,in order to optimize the thickness of the bottom plate grouting reinforcement,com-bined with the actual geological conditions of a mine,through the UDEC numerical simulation to compare the amount of the stent trapped in the bottom of the different thickness of the grouting,deduced the thickness of the grouting reinforcement with the stent load and the strength of the solidified body and other parameters of the principal relationship,the calculation results show that:Reinforcement thickness should increase with the increase in bracket load and decrease with the increase in strength of the grouting body;the comprehensive analysis determines that when the thickness of grouting is 1m,the bracket is able to adapt to the condition of the bottom plate.Based on the results of numerical simulation and theoretical calculation,the main parameters of grouting were designed,and the construction was completed to realize the safe and economic passage of the comprehensive workface through the trapped column.
Keywords：fully mechanized caving facecollapse columnfloorgroutingreinforcement thickness
Publication Date：2024-06-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 6-9,15 )