Plane Slip Surface
Failure on the plane slip surface is manifested by a rock block sliding down along this surface. The rock wedge can be specified with a tension crack. The solution procedure of stability requires determination of the normal force N acting on the slip surface, the shear force Tact (active) and the resisting shear force Tres (passive).
Forces on the slip surface
The N acting on the slip surface are the main input data for the determination of the resisting shear forces Tres. Calculation of the active shear force Tact and the normal force N is further influenced by the own weight of block (depends on the geometry and ), , , and . The active force Tact and the normal force N are determined as a sum of all forces entering the analysis.and the normal force
The program offers several types of plane slip surfaces:
The resulting verification can be carried out either according to the selectedbased on the input in the " " frame.