DOI: 10.11799/ce202502009
Failure mechanism and control technology of surrounding rock in deep large-section roadways
ZHAO Baofu
Abstract：In response to the severe damage of deep and large-section roadways in the Dahaize Coal Mine,we summarized the damage characteristics of the roadways through on-site investigation and causes analysis of damage.On this basis,a targeted support optimization scheme was proposed with high bearing capacity flexible anchor rods as the core.In order to verify the rationality of the optimization scheme,a Trigon model was established using UDEC,and the deformation amount,plastic zone range,and distribution characteristics of rock fractures in the roadway were compared between the original and the optimized scheme under two different conditions.The simulation results show that,the optimized scheme significantly improves roadway stability,with markedly reduced deformation and plastic zone development,and substantially fewer internal fractures in the surrounding rock.In the industrial tests,the surrounding rock of the roadway stabilized at 50 days,with a maximum subsidence of 197 mm in the roof;and the overall shaping effect of the roadway was good.
Keywords：large-section roadwayfailure mechanismTrigon modelfracturesflexible bolt
Publication Date：2025-02-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 61-67 )