In this paper, rigid body limit equilibrium method (including the force vector balance method, moment balance method at compression bolt of force application and moment balance method consider the Counterforce distribution of torque of rock slope, etc.) are implemented to optimize key parameters such as the wheel pressure values,beam section height, the amount of tension bolt and rock anchor inclination angle. And the detail optimization case is followed:(1)The beam height varies from 2.4m to 2.8m, rock slope angle from 0°to 40°, and seven groups of up and lowe row bolt angle (5°,0°)、(10°,5°)、(15°,10°) (20°, 15°)、(25°,20°)、(30°,25°)、(35°,30°)(2)On the basis of optimization, focusing on beam height, and bolt rock inclination angle of the value of seven types of programs, further analysis and comparison were executed, taking into account four different beams section hight (2.8 m、2.7 m、2.6m、2.5 m),three different slope angle (30°、35°,40°) and three Groups for up and lowe row bolt angle((25°,20°)、(20°,15°)、(15°,10°))In a comprehensive comparative analysis of the results of optimization based on the works of a crane height, rockl slope angle, the angle of the bolts, the amount of tension bolt, depth of the beamreinforced bolts, and so on, the main parameters optimization are given for one project.
