Stability Analysis and Control Measures of Large-Span Open-Off Cut with Argillaceous Cemented Sandstone Layered Roof

This paper is based on the condition where layered argillaceous cemented sandstone as an engineering background met by No. 207 fully mechanized working face open-off cut (Wanli 1 Coal Mine). Through mechanical theory analysis and field practice, safety problem of large-span roof supporting structure was analyzed. The caving arch height roadway in obtained mechanism instability surrounding rock mass roof. anchor cable suspension bearing stability were analyzed terms beam model. Meanwhile, combining with conditions, reasonable effective support countermeasures key parameters are proposed for such enhance actual on-site. These research results could provide reference composite conditions featured to weak cementation interlayer.