Analysis Of Slope Stability Under The Action Of Rainfall And Blasting

With the continuous development of China's economy,the demand for mineral resources is also increasing.China is a large mineral resource country,with a long history of mineral exploitation,which accounts for more than 80% of the open pit mining.As time goes on,more and more mines transform from open pit mines to deep open pit mines,so the safety of slope is more and more seriously considered by people.The geological disasters,such as collapse and landslide induced by slope instability,are widespread and serious natural disasters in the world,which greatly jeopardizing the safety of human life and property.There are many factors affecting the stability of the slope,which are mainly divided into two kinds of factors and external factors,such as the nature of rock,structure and so on.These are naturally formed,we can not change;the external factors include rainfall,blasting(earthquake),artificial excavation,etc.,in external factors,rainfall and blasting(earthquakes)are the main factors.The influencing factors,studying the influence of these two factors on the slope will be important for ensuring the safety of the slope.Therefore,this paper takes the actual mine slope as the research object,analyzes and studies the influence of two factors on the slope through two means of theoretical calculation and numerical simulation.The calculation results show that the safety coefficient of the slope is continuously reduced with the increase of rainfall.In this paper,12 kinds of different rainfall are selected to the slope respectively.The results are analyzed and the results are analyzed.With the increase of the rainfall,the safety factor of the slope is reduced from the initial 1.34 to 0.996,and the slope is also damaged at this time.In the analysis of the effect of blasting on the slope,the blasting in the range of 100~400m is selected and the effect on the slope will be weakened as the distance between the blasting point and the slope is more and more far away.Because the impact of the blasting on the existing slope is considered in this paper,the distance is basically outside 200 m,when the distance is 22.0m,only considering the effect of blasting on the slope,the safety factor of slope stability is 1.23,although the slope is affected by blasting vibration,but it is much smaller than the effect of rainfall on the slope,but if the two factors simultaneously act on the slope,theeffect will be superimposed,and the influence on the slope will also increase.In the process of numerical simulation,the result of the stability and safety factor of the simulated calculation is slightly lower than the theoretical calculation,but the phase is similar.The results of the two methods have formed a better mutual validation,which is sufficient to prove the reliability of the calculation.Therefore,in the process of mine production,the groundwater level of the slope after rainfall should be monitored and appropriate measures should be taken so as to avoid the impact on the safe production and life of the mining area.