Study On Stability Analysis And Treatment Measures Of Gangue Hill Slope No.3 Of Xinqiuxi Dump

Due to a large amount of mining of coal resources in the Xinqiu district of Fuxin city,coal gangue accumulates in a large area for a long time,which will not only destroy the surrounding geological environment but also easily lead to landslides and other disasters,threatening the safety of residents’ lives and property.Therefore,it is of great significance to study the stability of the gangue hill slope and put forward treatment measures.After field investigation of No.3 gangue hill and summarizing the engineering situation of the study area,it is concluded that the gangue accumulation thickness is large,the structure is loose,precipitation has a significant impact,and human activities are strong factors affecting the stability of the slope.The gangue pile test was carried out,and the stable slope angle of the slope increased firstly and then decreased with the increase of water content.The regression equation between water content and stable slope angle was established by regression analysis.Through indoor rainfall simulation,it is concluded that the slope is prone to shallow erosion failure and compound failure along the bottom contact surface.The rainfall duration is about 35-70 min,and the volumetric water content increases rapidly.When the volumetric water content reaches about30%,the growth tends to be stable.Geo-studio software was used to analyze the slope stability changes under rainfall conditions.The results showed that under the rainfall intensity of 33mm/h and the rainfall duration of 1d,pore water pressure in the slope increased continuously,and the safety factor of most sections decreased rapidly within 0-0.5d of rainfall and slowed significantly within 0.5-1.0d.Finally,the safety factor of each section is close to 1.0.When the rainfall lasts for 2-10 h,the slip surface of the slope slowly moves down,the pore water pressure at the foot of the slope rises significantly,and the safety factor gradually decreases.The limit equilibrium method is used to calculate that the safety factor of each section of the slope is between 1.021 and 1.047,approximately in the limit equilibrium state.Based on the above analysis,the scheme of slope cutting and retaining wall engineering,improving the interception and drainage system,ecological restoration,and monitoring project were formulated.The evaluation of a good treatment effect shows that the scheme is appropriate and feasible.In this paper,the regression equation for the waste rock in the new high natural stack when the stable slope angle is determined,and then determine the slope stability of coal gangue piles provided the scientific basis,analysis of the condition of rainfall the slope destruction form and volumetric moisture content changes,can provide the theoretical basis for the numerical simulation,study the No.3 coal gangue hill stability under different conditions,laid a theoretical foundation for project management,the results obtained have reference significance for other similar projects.This paper has 38 figures,14 tables,and 81 references.