侧压对底板切槽围岩稳定性影响模拟分析

Floor grooving is an active measure to control floor heave by changing the stress state of surrounding rock. The influence of floor grooving on deformation of surrounding rock and law of stress evolution has been researched by numerical simulation under different lateral pressure coefficients. The results show that: floor grooving can lead to increase of roof and floor displacement, it is more suitable for large lateral pressure coefficient; the influence of floor grooving on roof stress distribution isn't obvious; with the increase of depth of groove, the stress peak of sides and floor shift to deep and the value decrease at the same time, the main change of floor is that the stress peak shift to deep; the lateral pressure coefficient larger, the distance of peak shift is smaller.