基于颗粒流理论的露天矿排土场稳定性分析

Analysis of dump stability of open-pit mine based on particle flow theory

以某露天矿排土场为研究背景,利用颗粒流理论及PFC2D程序,深入分析排土场变形、破坏规律及其稳定性。研究结果表明:①在地基承载力较好的情况下,排土场滑坡呈沿堆置体内部及地基表层的多方式组合形式,滑动面在堆置体内呈近似圆弧形状;②排土场滑体中,安全平台上部颗粒变形活动较为活跃,稳定性较差;③安全平台的设置,是控制排土场变形破坏的有效手段。研究表明,颗粒流技术为分析排土场稳定性问题提供了一种新的思路。

The study background of the paper is the dump of an open-pit mine.The deformation damage and stability of the dump are deeply analyzed with the Particle Flow Theory,by using the PFC2D numerical simulation program.Some study results are draw as follow：（1） In good condition of foundation bearing capacity,the type of dump landslide is multi-mode combined that the sliding mass slip inside the dump and along the surface layer of the foundation,and the slip surface is approximately circular arc;（2） In the sliding musses of the dump,the movement of particles above the security platform is active,and the stability of this part is poor.（3） The security platform is an effective method to control the deformation and damage of the dump.The study results show that Particle Flow Theory provide a new speculation for stability research of the dump.