Research on shear resistance and angle control of tube anchor cable in roof roadways of extra-thick coal seams
SHAN Renliang
WU Jingtong
LIU Shuai
LI Gengzhao
BAO Yongsheng
LIU Jinrong
Abstract：Addressing issues such as extrusion and fragmentation of the surrounding rock at the top corner,end warping of the free section of the anchor cable under uneven combined load,and significant deformation of both sides in roadways along the roofs of extra-thick coal seams,this study focused on the 8204 roadway of the Tongxin mine.It employed field investigation,tensile and shear tests,FLAC3D numerical simulations and field industrial experiments.The research also involved the development and application of the shear-resistant anchor cable with C-shaped tube(ACC)for controlling sidewall and corner stability in such road-ways.Initially,tensile and shear tests were conducted to assess the bearing capacity of ACC;Subsequently,an analysis of the stress distribution within the roadway's surrounding rock was carried out without considering the influence of the original rock stress;This analysis aimed to identify the reasons for the poor support effect of the original support scheme.Finally,in conjunction with the concept of reinforcing sidewalls and corners,this study proposed ACC sidewall and corner control technology and an optimized support scheme.Numerical simulations confirmed the effectiveness of the optimized scheme.A 300 m-long industrial experiment was conducted in the field,and the monitoring data showed that the deformation of the surrounding rock had been effectively controlled through the application of ACC sidewall and corner control technology.
Keywords：shear-resistant anchor cable with C-shaped tuberoadway supportsupporting stress fieldroad-way in extra-thick coal seamsurrounding rock controlnumerical simulation
Publication Date：2023-12-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 1-10 )