Open AccessCharacteristic analysis of the Nayong rock avalanche based on the seismic signal
Author(s) -
Hao Luo,
Yueping Yin,
Aiguo Xing,
Jin Ke,
Sai Xu,
Yu Zhuang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/570/4/042043
Subject(s) - geology , seismometer , seismology , inverse transform sampling , signal (programming language) , inversion (geology) , seismic wave , discrete element method , engineering , computer science , mechanics , physics , surface wave , telecommunications , programming language , tectonics
A rock avalanche that destroyed 23 houses and killed 35 people occurred on August 28, 2017 in Nayong, southwest China. A discrete element model, MatDEM, was combined with the dynamic parameters of seismic signal inversion to determine the kinematic behavior of rock avalanches. The best fitting parameters were identified by comparing the velocity evolution process of numerical simulation with that of seismic signal inversion. The dynamic process obtained by modeling was compared with the frequency distribution spectrum of the nearest seismometer, with results revealing that the dynamic process agrees with the parameters inverted from the seismic signals. The simulation results further indicate that the movement process lasted for nearly 40 s, with a maximum speed of 40 m/s. The selected models and parameters can help provide a more accurate explanation of the dynamic processes of similar rock avalanches and are significant to hazard prediction in karst areas.