梳妆台危岩体稳定性评价及落石运动特征研究  

Stability Evaluation and Rockfall Movement Characteristics of Unstable Rock Block in Shuzhuangtai

作　　者：王朋 贾洪彪[1] 马淑芝[1] 张子涵 李逸鹏 刘翠 WANG Peng;JIA Hongbiao;MA Shuzhi;ZHANG Zihan;LI Yipeng;LIU Cui(Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China;School of Computer Sciences,China University of Geosciences(Wuhan),Wuhan 430078,China)

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074 [2]中国地质大学(武汉)计算机学院,湖北武汉430078

出　　处：《安全与环境工程》2022年第4期139-146,共8页Safety and Environmental Engineering

摘　　要：武当山梳妆台危岩体对下方游客通道安全性构成严重威胁。结合武当山梳妆台危岩体稳定性影响因素,分析其可能的破坏模式,并采用极限平衡法与3DEC数值模拟对危岩体稳定性进行了评价;同时,使用RocFall软件模拟了危岩体崩塌后可能的落石运动路径,得到崩塌体到达游客通道时的冲击动能、弹跳高度、运动速度等特征参数,并探讨了不同破坏模式对落石运动特征的影响。结果表明:梳妆台危岩体破坏模式主要为随机块体崩落和岩体后缘裂隙发育下的“拉裂-倾倒”式破坏;在天然工况下危岩体处于稳定状态,暴雨工况下危岩体处于欠稳定状态,地震工况下危岩体会发生失稳破坏;危岩体不同破坏模式对落石运动特征的影响主要体现在坡脚平台运动阶段,且落石初始角速度会显著影响落石在坡脚平台处的弹跳高度。The unstable rock block of Shuzhuangtai in Wudang Mountain poses a serious threat to the safety of the tourist passage below.Combined with the factors affecting the stability of unstable rock block,this paper analyzes the possible failure mode of unstable rock block in Shuzhuangtai,and evaluates the stability of unstable rock block by the limit equilibrium method and 3 DEC numerical simulation.Then,with RocFall software the paper conducts numerical simulation of the possible rockfall movement path after the collapse of unstable rock block,obtains the characteristic parameters such as impact kinetic energy,bounce height and translational velocity when the collapse mass reaches the tourist passage,and discusses the influence of different failure modes on the movement characteristics of rockfall.The results show that the failure of unstable rock block in Shuzhuangtai is mainly random block collapse and“cracking-dumping”failure under the development of the fracture at the trailing edge of the unstable rock block;the unstable rock block is stable under natural conditions,unstable under rainstorm conditions,and is damaged under earthquake conditions;the influence of different failure modes of unstable rock block on the movement characteristics of rockfall is mainly reflected in the movement stage of the platform at the foot of the slope,and the initial angular velocity of rockfall will significantly affect the bounce height of rockfall at the platform at the foot of the slope.

关 键 词：梳妆台危岩体 稳定性评价 落石运动路径 RocFall软件 危岩体防治 

分 类 号：X4[环境科学与工程—灾害防治] P642.21[天文地球—工程地质学]