Physical simulation experiments offer a powerful method to explore influence of plastic flow,material failure and hybrid monitoring in a high and steep slope of open-pit mines composed with discontinuous rocks.We adopted an experimental setup using a stiffmodular applied static loading to fulfill visual excavation to the slope at random depth.Before constructing 3D model,searching of scientific model materials had been done.The simulation experiments were instrumented with acoustic emission (AE) censors,and monitored by crack optical acquirement (COA),ground penetrating radar (GPR),and close-field photogrammetry (CFP) being unequivocal mechanisms of rock destabilization in the high and steep slope.The Shuichang iron mine in Hebei province of China was taken as a prototype for large 3D physical simulation experiments.The high and steep slope mainly concluded a steep slope whose angle ranged from 30 to 47 degrees,an ore body with 80 degrees,and maximum width and height of the model were both 800 meters as well as other geological structures under in-situ complicated stress.For the complex situation of study area,model experiments show that slope was excavated with multi stage-parameter real monitoring under constant boundary conditions.It also showed inner correlation between model's destabilization resulted from slope excavation and diverse monitoring information was clearly gotten.Although the model with large scale did not include the whole complexity found in the actual open-pit mines or even in the experimental scaled models,it was also a useful tool to study the mechanism of high and steep slope destabilization both qualitatively and quantitatively.
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