中国矿山工程

This article takes the 1811 coal mining face in the southwest region as the engineering background. Through theoretical analysis, numerical simulation, and on-site industrial testing, a mechanical model of the surrounding rock structure of the inclined coal seam along the goaf was established. The deformation and failure laws of the surrounding rock of the inclined coal seam along the goaf were studied under different factors, and flexible support technology was proposed accordingly, which was applied on site. 〖JP2〗Research has shown that increasing the strength parameters of the coal rock interface or enhancing the support strength is the most effective way to narrow the limit equilibrium zone. As the cutting angle, coal seam inclination angle, height width difference of the roadway, and coal seam burial depth increase, the deformation and damage of the surrounding rock of the roadway become more significant, the shrinkage rate of the roadway further increases, and the degree of basic roof fracture significantly increases. As the basic roof thickness increases, the degree of deformation and damage of the surrounding rock in the tunnel decreases. The three stages of vertical stress on the coal wall side of the roadway and the evolution of overlying rock in the roadway have been divided, and the roadway can be judged by monitoring the stress changes of the coal wall to achieve pre control of surrounding rock disasters in the roadway. The research results can provide reference for controlling the surrounding rock of the roadway along the goaf of gently inclined coal seams in the southwest region.