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本文详细分析了四川省九寨沟的九环公路的危岩体崩塌的成因模式,并将崩塌失稳后的运动过程分为自由落体运动、弹跳和滚动等3个阶段。利用PFC软件模拟崩塌体的运动行为,预测其飞行高度和滑落距离,以及对破面的冲击回弹作用和防护设施的冲击能量,展现崩塌体自脱离岩石母体,到掉落静止或破碎的全过程,并对尚存在危石的风险进行预测。
This paper analyzes in detail the genesis pattern of the dangerous rock mass collapse of Jiuhuan Highway in Jiuzhaigou, Sichuan Province, and divides the movement process after collapse and instability into three stages: free fall, bouncing and rolling. PFC software was used to simulate the movement behavior of the collapse body, predict its flight height and sliding distance, as well as the impact rebound effect on the broken surface and the impact energy of the protective facilities, showing that the collapse body is self-detaching from the rock matrix, falling still or broken Process, and predict the risk of the existence of dangerous rock.