Slope three-dimensional stability calculation method under strip mine transverse mining inner discharge slope pressing effect

The invention discloses a method for calculating the three-dimensional stability of a side slope under the action of a transverse mining inner drainage pressure slope of a strip mine, and the method comprises the steps: S1, building a potential sliding surface spatial form equation according to the form of the side slope of a stope in a research region, the weak layer of a sliding body and the form of a potential sliding surface by adopting a three-dimensional numerical simulation technology; s2, based on a spatial form equation, dividing the slope into a plurality of micro-strip columns in i rows and j columns, carrying out stress analysis on each micro-strip column, and respectively calculating the anti-sliding force and the gliding force of the micro-strip columns in each region; s3, superposing the force of each row of micro-strip columns along the direction of the main slide wire to obtain the total anti-sliding force and the total sliding force on the main slide wire; and S4, a three-dimensional slope s