山坡堆积型排土场厚软基底边坡变形破坏规律数值分析

Numerical Analysis of Slope Deformation and Destroy Law for Huge Soft Hill Base on Hillside Stack Dump

山坡堆积型排土场的堆排量与安全性在山坡基底坡度一定的情况下,主要决定于基底的强度。排土场边坡与基底厚软弱岩层的复合作用影响排土场边坡变形与破坏,控制排土场的安全稳定。应用数值模拟方法来分析排土场厚软基底与边坡的位移场分布规律与排土场变形破坏模式;找出危险滑面与滑移变形的危险部位。对30°、24°坡角的边坡及24°坡角多台阶排土边坡进行变形破坏模式分析,总结变形破坏规律及其影响因素。其变形与破坏的模拟分析结果与现场破坏形式基本一致,由此可为排土场设计提供科学依据。

The stackable quantity and security of hillside stack dump depend on the strength of huge soft hill base if the slope is fixed.The combined action of dump slope and huge soft hill base influences slope deformation and destruction,and controls the dump security and stabilization.The deformation field distribution rules and deformation and destruction modes are analyzed using numerical simulation methods,and the dangerous position of sliding deformation was found.Sum up the deformation and destruction law and effect factors through analyzing deformation and destruction of 30°、24°slope and 24°multi-step dump slope.The conclusion of numerical analysis of deformation and destroy is essentially in accordance with the fact of on-site destruction.Therefore,scientific basis can be provided for dump design.