Abstract:In response to the problem of large deformation of the surrounding rock in the 33104 transportation channel, based on the original anchor spray support, it is proposed to use anchor injection support to improve the stability of the surrounding rock. By simulating the changes in stress and displacement of the tunnel before and after grouting, it can be seen that the bearing capacity of the surrounding rock is improved after anchor grouting support, and anchor solids are formed in the shallow surrounding rock. The stress peak shifts to the deep, and the shallow surrounding rock is in a stress reduction zone. At the same time, grouting can bond loose and fractured surrounding rock into a whole, improve the bearing capacity of the surrounding rock, significantly improve the deformation of the surrounding rock, and achieve significant support effects.
