With the tailings dam reinforcement project newly built in Yakou as the example and limit equilibrium horizontal slice method as the methodology, this paper has researched the feasibility of applying geosynthetics in fine tailings dam reinforcement. The results from limit equilibrium horizontal slice method show that the stability of reinforced tailings dam with geosynthetics increases by 14~17%; while results from numerical simulation method show that the principal stress vector direction and the principal displacement vector direction of the dam body can be changed to be favorable to the stabilization of dam by using geosynthetics to reinforce the tailings dam.

Every year, China suffers greatly from economic losses caused by rockfall hazards. The key to effectively control rockfall hazards is to obtain an accurate rockfall trajectory. However, not only is rockfall trajectory complex and unable to be described accurately in mathematical formula, but basic parameters influencing its movement are also unable to be measured directly. Therefore, the back analysis method combining laboratory rockfall simulation test with computer numerical simulation is adopted to study rockfall trajectory and its basic parameters. The results show that the method can not only get basic parameters of rockfall trajectory such as coefficient of restitution and angle of frication, but also precisely deduce true rockfall trajectory, which can provide help in effectively controlling rockfall hazards.