Grouting is widely utilized to reinforce fractured surrounding
rock. However, presently, the secondary stress distribution of fractured
surrounding rock after grouting is not distinct, which hinders the
accurate evaluation of the grouting effect. Therefore, a complex variable
function solution is provided for the evolution of the stress field
and the displacement field around the reinforced fractured surrounding
rock subjected to a nonuniform load. By comparing the evolution of
the stress and radial displacement fields around the cavern, the reinforcement
effect on the fractured surrounding rock is quantitatively confirmed.
The results show that grouting has an obvious modification effect
on fractured surrounding rock: its radial stress and circumferential
stress fields are affected to different degrees, and the circumferential
stress is more obvious. Grouting makes the circumferential stress
peak transfer from the wall of the cavern to the roof and floor of
the cavern, which is beneficial to the stability of the cavern. The
radial displacement around the cavern also decreases. The displacement
of the wall decreases by approximately 24.0%, and the radial displacement
of the roof and floor decreases by approximately 61.8%.