降雨入渗作用下基底倾角对内排土场边坡变形的影响OA北大核心CSTPCD

In order to study the influence of basement inclination on the stability of the dump slope under rainfall conditions,accord-ing to the actual situation of Antaibao Open-pit Coal Mine,FLAC3D software was used to simulate the slope of the dump under the same rain intensity and different base inclination angles.The results show that in the early stage of rainfall,the saturation of the sur-face layer of the dump slope first grows rapidly and tends to the stable value of unsaturation,and when the rainfall infiltrates to the junction of the weak layer and bedrock,the rainwater accumulates at the slope angle under the action of gravity and leads to shear failure at the slope angle.With the increase of the basement inclination,the time lag effect occurred in each monitoring point when it reached saturation or steady state,and the displacement and strain increment were positively correlated with the substrate inclination.