DOI: 10.11799/ce202511008
Geomechanical characteristics and support parameter optimization of coal roadways
WANG Zhiqiang
YU Feng
LIU Binyu
HAN Xiaolan
QI Xiangli
Abstract：Taking Ping'anbao Mine as the engineering background,on-site secondary stress measurement,rock mechanics parameter testing,and numerical simulation analysis of the excavated roadway were conducted.According to the measurement,the maximum principal stress σmax=6.68 MPa,which was 2.56 times the self weight stress;Then,using FLAC3D displacement inversion,the distribution of secondary stress field after roadway excavation was clarified,and the horizontal stresses σx and σy were 5.0 and 4.0 MPa,respectively.Finally,a support scheme was proposed using grouting with anchor bolt and cable.According to the on-site practice,the roof displacement decreased by 21%from 300 mm to 239 mm,and the floor heave decreased by 49%from 226 mm to 115 mm,demonstrating the effectiveness for controlling the serious deformation in high stress roadways.
Keywords：secondary stresssurrounding rock strengthsupport optimizationgrouting anchor cable
Publication Date：2025-11-20
Online Publishing Date：2026-01-15(First online date of this platform, not the publication date of the document)
Pages：7( 57-63 )