DOI: 10.11799/ce202503016
Lateral load mechanism and load reduction control technology of roadside support in gob-side entry retaining
GAO Jinbo
JING Yongjia
ZHAO Junli
BAI Wei
HU Junfeng
LYU Yuzhu
LI Junqi
FENG Bo
Abstract：Taking the No.431301 working face haulage roadway in Liangshuijing Mine,Yulin,Shaanxi as the engineering background,we investigated the lateral load mechanism on gob-side roadway support based on roof movement characteristics during coal mining.Mechanical models of surrounding rock evolution above the roadside support were established for four distinct stages:bending subsidence of immediate roof,caving of immediate roof,rotational subsidence of main roof,and stabilization of main roof.Analytical expressions for lateral loads exerted by roof movement on the support structure were derived,revealing the coupling relationship between roof parameters and lateral load magnitude.The results show that the lateral loading degree of the roadside support is inversely proportional to the thickness of the immediate roof,proportional to the bending rotation angle of the rock beam,and positively correlated with the length of the cantilever beam of the main roof.Based on the numerical simulation results,the roof length above the roadside support body is shortened by roof cutting,and the width of the roadside support body is increased to enhance its strength.Finally,the load reduction control scheme of the roadside support body of the gob-side entry retaining was proposed.The roof cutting height was 10.73 m,the roof cutting angle was 20°,and the reasonable width of the roadside support body was 1.6 m.
Keywords：gob-side entry retainingroof rotationnumerical simulationlateral loading
Publication Date：2025-03-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 115-125 )