Study On Stability Of High Slope Of Solid Waste Accumulate

China is rich in mineral resources,and solid waste will be produced in mineral mining and later mineral extraction.Due to the limitation of science and technology,the output of solid waste is large,so the accumulation of solid waste is inevitable.As an unavoidable geoscience environment and engineering form,the accumulation slope always exists with human engineering activities.In order to be safe and save resources,the materials that can not be extracted by science and technology in the tailings are piled up for the progress of science and technology.At the same time,the sliding range and stability of the accumulation slope become the location of immigrants,the safety of reservoirs and the economic benefits of water conservancy projects One of the focuses of worry.In this paper,through the collection and arrangement of the geographical environment and hydrological data of the Donggou slag disposal site,the physical and mechanical properties of the measured loose particles in the slag disposal site are tested,and the slope stability is calculated.The conclusion is as follows:(1)according to the analysis of comprehensive factors such as terrain characteristics,basement lithology,waste rock composition and abundant precipitation in the area,the waste dump has potential geological hazards such as waste rock landslide and debris flow,especially in the middle and later period of the operation of the waste dump,the probability of damage will gradually increase.According to the analysis of bearing capacity and ultimate height of the foundation,the bearing capacity of B-B section(2)and D-D sections(2)and(3)of the waste dump are relatively low.(2)after the rainfall,the transient saturation area begins to form on the soil surface.As the rainfall continues,the saturation area expands and starts to move downward.The infiltration speed is faster from 1day to 6 days after the rainfall,and the groundwater level rises.The transient saturation area disappears around 12 days after the rainfall,and the groundwater level rises to the highest point.Then the groundwater level starts to fall,and the water level at the top of the slope falls faster than that at the foot of the slope,The pore water pressure decreases from the foot of slope to the top of slope,and the groundwater level tends to be stable 30 days after rain.At the same time,if the rainfall continues to increase,there will be water seepage at the bottom of the step.(3)the most likely failure mode of Donggou slag disposal site slope is internal landslide,followed by foundation landslide.In 30 days of rainfall,the possible slidingdepth of the slope gradually deepens with the infiltration of the transient saturation area,and the safety factor of the slope gradually decreases with the infiltration of rainfall.About7 days after rainfall,the slope is the most dangerous state.The slope of Donggou slag disposal site is in a safe state,and then the safety of the slope gradually increases with the infiltration,and it is basically stable to about 25 days.(4)through the study and analysis of the slope stability of Donggou slag disposal site,it can be concluded that six sections are in a safe state under the natural and rainfall conditions.If there is heavy rainfall and other factors,section A-A may have some slip phenomenon.The study of slope stability has theoretical guiding significance for the evaluation of the same or similar slope governance stability.This study on the impact of rainfall infiltration on the slope stability of Donggou slag disposal site is of great significance for the later operation of Donggou slag disposal site to ensure its safety and stability.