Study on in-situ shear tests of carbonaceous slate on slopes
Rock parameters are important basic conditions for analysing the stability conditions of landslide areas.This paper took the landslide area of Baogang Barun Mining Industry as the engineering background and conducts stability studies on the slopes of loose rock masses mainly composed of black mica carbonaceous slate,the in-situ shear test results were fitted using a combination of on-site in-situ shear test,theoretical calculation,and digital image processing technology.The friction angle and cohesion of the on-site rock mass were determined based on the least squares method.The digital three-dimensional morphology of the joint surface in the in-situ shear test was analyzed,and the complexity of the shear structural surface was quantitatively characterized through fractal dimension.The results showed that the shear stress obtained during the in-situ test at 0～1 MPa normal stress had a goodness of fit of 0.98.Refer-ence[14]studied the shear stress obtained from four sets of experiments under normal stress of 3～14 MPa,with a goodness of fit of 0.75.The shear structural plane was generated in the rock mass between 120 and 240mm in the vertical direction of the sample,along with the occurrence of shear failure on the structural plane,there was also shear dilation failure.The complexity of the shear structure surface morphology was relatively high,with a fractal dimension value of 1.68.The idea of in-situ shear testing and mathematical analysis of im-age morphology provides an important reference for the prediction and quantitative characterisation of physical and mechanical parame-ters of rock masses in the field.
NETL
NSTL
万方数据
