Open AccessRisk assessment of high slope landslide in open-pit mine based on comprehensive geophysical prospecting
Author(s) -
Zihao Zhao,
Haijian Lyu,
Seunggu Kang
Publication year - 2022
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/983/1/012082
Subject(s) - landslide , prospecting , geology , mining engineering , open pit mining , geotechnical engineering , slope stability , matrix (chemical analysis) , materials science , composite material
The landslide of high slope of open-pit ore rock poses a great threat to the safe production of open-pit mine and seriously affects the economic benefits of the mine. The risk of landslides for the mines where landslides have occurred should be assessed in order to avoid similar accidents. The mechanism of landslide in area C of Bayan Obo’s East mine was studied, and the comprehensive prospecting of seismic method, geological radar method and high-density electric method was carried out on all areas of the main east mine without landslide reinforcement. On the basis of comprehensive prospecting results, five indicators affecting slope stability, such as water content and fault combination mode, were selected. By making pairwise comparison between these five factors, the judgment matrix was constructed, and the weight matrix of each factor was obtained by transforming the judgment matrix. Based on experience and parameter sensitivity analysis, these indexes were divided into three levels: high risk, medium risk and low risk, and the degree of correlation between each factor and evaluation was calculated. Taking a section as an example, the gray fuzzy matrix and weight matrix were constructed, and the gray comprehensive fuzzy judgment was carried out to determine the landslide risk level of the section.