Study on the stability of surrounding rock in the underground space of coastal reef limestone

To analyze the stability of the surrounding rock of the underground space of reef limestone. This paper uses COMSOL Multiphysics multi-physics finite element analysis software to study the stable evolution law of the surrounding rock of the underground space of coastal reef limestone. Based on the homogeneous body hypothesis, the influence of the thickness of the side cover and the scale of the cave on the deformation of the surrounding rock of the underground space of reef limestone is analyzed. The study shows that the development of the cave causes the displacement of the surrounding rock, the settlement of the upper part, and the horizontal displacement of the lower part. The deformation peak is positively correlated with the thickness of the side cover and the diameter of the cave. Adjusting these parameters can help control the deformation. Monitoring the displacement around the cave is very important for evaluating the deformation state of the surrounding rock.