Research On The Stability And Management Of The High Rock Slope In The Southern Part Of Huaqiao Town Open-pit Min

Open-pit mining areas are susceptible to geological disasters such as landslides and collapses due to their high and steep slopes and complex geological environment.Such disasters pose a severe threat to the mine’s production and the safety of personnel and property.Thus,there is a crucial need for a thorough analysis and discussion on slope stability issues during the mining process.This article takes the southern slope of the Huaqiao Town open-pit mine as the background,and analyzes the potential failure mode of the slope based on the collected engineering geological data.Conduct numerical simulation research on the slope and establish a three-dimensional model to analyze the overall stability of the slope;Establish a local slope model to analyze the impact of faults and phyllite schistosity on the slope;Select a profile to analyze the stability of the slope under different working conditions and propose treatment measures for the slope based on the simulation results.The research results indicate that the southern slope is easily controlled by faults and schistosity planes,with potential sliding failure of "sliding bending tracing schistosity planes along faults",local step single plane sliding failure,wedge sliding failure,and collapse failure;The slope is in an unstable state under the dead weight condition,the potential sliding surface further expands under the rainstorm condition,and is in an unstable state.The vibration speed exceeds the safety threshold under the blasting condition,and the slope is in an unstable state.In order to meet the safety production of open-pit mines,prestressed anchor cables and anti slip piles are used for joint reinforcement.The results of the cloud map and safety coefficient of the slope under different working conditions before and after reinforcement are compared to ensure that the reinforced slope meets the safety requirements.The specific research work of this article is as follows:(1)Surface rock sampling is carried out for the slope.The rock is processed according to the test specifications and the uniaxial compression test and Brazilian split test are carried out to obtain the rock mechanics parameters.Based on the Hawke Brown strength criterion,the physical and mechanical parameters of the slope rock mass are determined by using Roc Lab analysis software.(2)Based on statistical analysis of structural planes,it is concluded that the dominant structural planes of the slope are mainly FEW230-260 fault,densely developed phyllite schistose plane,and dominant joint plane.The potential failure mode of the slope is determined based on field survey and stereographic projection methods.(3)Based on the parameters obtained from the experimental process,a slope model was established using Midas GTS software to analyze the stability of slopes affected by structural planes such as faults and schistosity planes.The stability of slopes under natural,rainfall,and blasting conditions was analyzed,and the changes in maximum shear strain,equivalent plastic strain,safety factor,and slope vibration velocity under natural and rainfall conditions were obtained.(4)Analyze the mechanism of reinforcement measures and combine them with the actual situation of the slope,and determine that the reinforcement measures for the slope are the combination of prestressed anchor cables and anti slip piles.The anti slip piles are arranged in the fault and lower section of the slope.Use Midas GTS software to compare the results of different working conditions before and after slope reinforcement,and obtain the effect of this treatment plan on improving slope safety.