Tool post method residual mining area stability analysis method based on variable load effect

The invention belongs to the technical field of residual coal mining, and particularly relates to a tool post method residual mining area stability analysis method based on a variable load effect. Themethod comprises the following steps that S1, acquiring mine geological data and mining data and determining mine mining parameters; S2, determining rock stratum composition, structure and physical and mechanical parameters among rock stratums through experiments by using a drilling peeping and drilling coring method, and measuring to obtain the compressive strength, shear strength, elasticity modulus and inertia moment of the immediate roof key rock stratum and the compressive strength, elasticity modulus and inertia moment of the coal pillar; S3, calculating the maximum shear stress and themaximum normal stress borne by the immediate roof key rock stratum and the maximum normal stress borne by the coal pillar according to the mine geological data and the mining parameters and the elasticity modulus and the iner