The Law of Ground Pressure in Surrounding Rock around Salt Cavity of Connected Wells

摘要

In this paper, a calculating model is established to investigate the behavior of roof and salt wall of salt cavity, which is considered as an infinite long beam based on an elastoplastic Double-parameter Foundation, and it is regarded as a plane strain problem. A differential equation of equilibrium is solved. by means of variational principle. it is obtained that the plastic width of salt wall and the law of underground pressure in surrounding rocks, before and after the roof's fracture, and determined that the criterion of the rock beam's losing stability and falling. The calculating results match better with the modeling experimental results.