Finite Element Analysis of Rock Damage Hollow Outside Shaft Wall Lining and Grouting

Crushing sand and vertical cavity wall have been threatening the safety of coal mine in production, the analysis about destroyed vertical stability and processing method are concerned. This paper used the FEM software ADINA, with the combination of Mohr - Coulomb criterion and tensile failure criteria,and simulate the damage of the wall cavity and grouting according to the inspection at original space, the basic rules among them had been studied. According to the result of analysis, grouting scheme was formulated. The analysis about numerical simulation shown that: crushing sand and vertical cavity wall would have an adverse effect on the stability of shaft body and it could cause the land subsidence; Grouting pressure has a direct impact on the stability of shaft body. When grouting pressure was large enough, the vertical stress could appear shaftlining pull pressure; It could lead to wall the rupture of the wall.