Abstract:
In order to analyze the effect of arrangement forms on advance pre-grouting in working face, we establish numerical model to analyze the stress and displacement of working face and roadway. The results showed that single row holes, delta mode holes are more suitable for controlling the upper and lower rib spalling of working face. Different arrangement forms will have little impact on the rib spalling of working face in the middle. With the increase of grouting hole length, the carrying capacity of roadway surrounding rock is gradually enhanced. Delta mode holes can better reduce settlement of roadway roof than single row holes. Whether single row holes or delta mode holes, the horizontal displacement of the roadway mainly depends on the upper holes position.