Combined supporting of bolt-mesh-shotcrete and U-shape steel support in cross-cut with floor heave
WANG Chao
WU Yongping
HUANG Xiaoping
CHEN Shijiang
ZHENG Wenxiang
Abstract：According to the severe floor heave problem of track cross-cut with mining level + 1 100 m in Liu Yuanzhi coal mine,cross-cut passing through hard roof and soft floor was found.The surrounding rock stress and yield zones and displacements of cross-cut,which were supported with bolt-mesh-shotcrete with 36U-shape steel combined support,and bolt-mesh-shotcrete with combined support of 36U-shape steel round frame,were calculated respectively by FLAC3D.The simulation results show that the floor heave amount is reduced by 57％.Field application results indicated that the cross-cut floor heave can be controlled effectively by boltmesh-shotcrete and combined support with 36U-shape steel round frame.The conclusions provide a kind of reliable technical and method for hard roof and soft floor roadway.
Keywords：cross-cutfloor heavecombined supportyield zone
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 31-36,45 )