Research On The Stability Of Slope Influenced By Blasting Vibration

Blasting technology with the rapid development of our country’s economy, with its advantages of fast, simple and economic has been widely used in open pit mines.At the same time, due to mining enterprises controlling the exploitation of cost, generally used steep slope mining,thus forming a large number of high and steep slope. Slope stability is directly related to production and construction smoothly and production enterprise personnel safety equipment and the economic benefits of mine. However, due to the continuous expansion of blasting, resulting in lower on the slope stability and landslide has become a priority in the blasting harm.At present,most of the research use the finite element and finite difference method.Due to the above methods are based on continuous medium and small deformation assumption, therefore they cannot meet many discontinuous surface situation contained in rock slope.These make the calculation queried by a certain degree.In order to overcome the deficiency of existing research, this article first from the basic characteristics of the blasting seismic wave,on the basis of analyzing the blasting seismic wave and earthquake damage mechanism, based on the research of the blasting seismic effect and in-depth analysis of the vibration failure criterion, lower of the slope stability under blasting vibration is carried on the thorough explanation. In this paper, based on geological structure and the joint distribution of the south slope of the2th hole of ShuangLi in Inner Mongolia,discrete element model is established. Application of general discrete element program（UDEC）,the paper conduct a large number of numerical simulation to model.According to the actual quantity of explosive of the mine, the law of distribution of there value that indicate vibration under blasting vibration in the slope rock mass is carried on the thorough research, acquired a lot of simulation data.On the basis of mass point of slope toe vibration intensity, draws amplification coefficient contour map of three value. slope height on the influence law of vibration intensity "elevation effect" was studied,through the dynamic responses of different height of slope,. Under the different height of slope, on the basis of the existing slope dynamic safety standard, determines the key control areas. For different reaction law of three value in two directions, put forward the necessity of monitoring vibration intensity together in both directions. At the same time, also explore the relationship of the displacement peak in both directions, and simplifies monitoring of the displacement peak. According to three value of slope shoulders infected by gradient changing,draw conclusions that gradient changing almost does not affect the there value amplification coefficient of slope shoulder, but the acceleration amplification coefficient is more sensitive. The paper according to the theory of the existing research results and engineering experience,expands the scope of applicable of the simulation conclusion.