The Study On Slope Stability Of Open-pit Mine In Jinduicheng Under Blasting Load

With the rapid development of the national economy,the demand for mineral resources is also increasing.Open-pit excavation is one of the important forms of mining of mineral resources.As the depth of excavation increases,the stability of the slope is increasingly severe.At the same time,the blasting operations at the time of excavation of mining have further aggravated the working conditions of the slope,and the stability problems caused by blasting have become increasingly prominent.This paper takes the Jinduicheng open-pit mine as the research area to study the law of the propagation attenuation of blasting vibration wave in the slope,study the dynamic response characteristics of open-pit mine slope under blasting load,and ensure the open-pit mine slope in the blasting excavation process.Safety and stability.In this paper,the effects of loose blasting on the rock slope stability in the open pit of Jinduicheng are studied.The field investigation,experimental test,theoretical calculation,and numerical simulation are used to study the engineering geological division in the mining area,the blasting seismic wave effect,and the blasting.The dynamic response law of the side edge under load was summarized,analyzed and studied.The main conclusions are as follows:(1)According to the topography of the exploration area,the characteristics of the engineering geological rock group,the characteristics of the rock structure,and the characteristics of the discontinuous structural plane of the rock,the mine is divided into three different regions:The scope is the northern section of the East and West Gang,and the northern gang,the main area of the II area is the middle section of the east and the west,the main area of the area? is the south section of the east and west;(2)The blasting vibration test test is conducted according to different rock areas,and the test The data is subjected to waveform,velocity,and Sa Dawowski regression analysis.The data obtained from the analysis shows that the blasting effect.Using the Rigid Geotechnical calculation software,the stability coefficient of the side zone in zone ?(northern)was lower than that of zone II(eastern and western);(3)The stability of the sidebar under blasting excavation was affected to a certain extent,and SARMA was used.Method calculations and comparisons are available.The side stability coefficient is reduced by 7%to 11%.(4)The discrete element software UDEC is used to perform numerical simulations on the rocky areas with hidden safety hazards.It can be seen from the calculation results that under blasting loads The rock mass in zone I is in an under-stable condition,and the rock mass in zone II is in a stable state.Compared with the stability factor of the slope corresponding to the natural state,the reduced stability coefficient mainly manifests in the stress concentration zone at the foot of the slope.The results of this study are in good agreement with the actual situation on the site,and have very important theoretical and applied values for the safe and efficient production of the stope in the open pit mine of Jinduicheng.The study has certain research on the dynamic stability of the same type of rock slope.Reference significance.