新疆库尔勒铁门关崩塌危岩体稳定性研究

Rockfall Stability Research of Tiemenguan in Korla,Xinjiang

崩塌是山区常见地质灾害。为保障人民生命财产安全,需查清崩塌危岩体发育分布特征,评价危岩体稳定状态,评估落石影响范围。采用二维极限平衡法和三维整体稳定法对新疆库尔勒铁门关崩塌危岩体不同工况条件下稳定性进行评价,崩塌危岩体大多在自重工况稳定状态为基本稳定和欠稳定,在自重+暴雨和自重+暴雨+地震两种工况条件下为欠稳定和不稳定。在此基础上,对崩塌危岩体进行落石轨迹分析,获得崩塌危岩体落石运动影响范围。落石轨迹模拟结果显示,崩塌落石均滚落或弹跳至社区道路上,停止于孔雀河河道内,为后续防护与治理措施提供理论依据。

Rockfall is a common geological hazard in mountainous areas.In order to ensure the safety of people's lives and property,it is necessary to investigate the development and distribution characteristics,evaluate the stable state and assess the impact range of dangerous rock masses.In this paper,two-dimensional limit equilibrium method and three-dimensional overall stability method were used to evaluate the stability of dangerous rock mass under different working conditions in Tiemenguan,Korla,Xinjiang.Most dangerous rock masses are basically stable and unstable under the dead weight working condition,and are unstable and unstable under the dead weight+rainstorm and dead weight+rainstorm+earthquake working conditions.On this basis,the rockfall trajectory of the dangerous rock mass was analyzed to obtain the impact range of rockfall movement.The simulation results of the rockfall trajectory indicated that all collapsed rocks could roll or bounce onto the community road,and ultimately stop in the Kongque River channel,which providing a theoretical basis for subsequent protection and control measures.