The reverse probing was carried out by using the expending method of critical sliding field, and the result show that both the safety factor and the optimum slope angle of waste-dump can be obtained.

• 再应用临界滑移场技术的扩展方法进行反向搜寻，不仅可以得到排土场边坡的安全系数，还能求得边坡的最佳设计坡角。