Study On Control Standard About Blasting Vibration Security Of High Rock Slop Under The Influence Of Structure Plane Mechanics Parameters

The vibration induced by blasting excavation can adversely affect the high rock slope.Most of the current use of particle peak vibration velocity of the empirical criteria for the control of blasting vibration.It is important to study the blasting safety control standard under different structural conditions for the excavation of the project and the safety of the construction.At present,there are few theoretical studies on the blasting vibration control standard with structural plane slope,and most of them are combined with engineering experience and field measurement data.In this paper,the method of theoretical analysis and numerical simulation is used to study the blasting vibration control standard of rock slope with structural plane,and here is the conclusion(1)When the same blasting load is given to the high slope of the structural plane rock,the damage degree of the structural plane with different mechanical properties(c,φ)is very different for the same spatial position.The harder the structural plane is,the closer the binding is,The smaller the degree of damage;the more weak the structure,the worse the combination,the greater the degree of damage.Therefore,it is unreasonable to ignore the mechanical properties of the structural slope.It is unreasonable to consider the blasting vibration control standard of rock high slope,and it is necessary to consider the influence of the mechanical properties of the structural plane.(2)When the same blasting load is given to the high slope of the structural facies rock,the damage degree of the structural plane of different spatial positions is very different for the same mechanical properties.The degree of damage to the bottom structure is large,and the damage of the top structural plane is small.Therefore,it is unreasonable to neglect the spatial position of the rock slope by considering the spatial position of the structural plane.It is necessary to consider the influence of the spatial position of the structural plane.(3)The numerical simulation of the local damage of the high slope with structural facies is carried out.The critical damage velocity of the structural plane of different space positions is studied.The critical damage velocity of the structural plane of different mechanical properties is studied.The trend of change.The safety standard of rock blasting damage considering the mechanical properties of the structural plane and the spatial location of the rock is given.(4)It is unreasonable to adopt the same safety control standard for high rock slope with structural plane,and it is necessary to select the corresponding control standard according to the mechanical properties of the structural plane and the spatial position.Through the combination of theoretical calculation and engineering practice,the critical damage control of high rock slope with structural facies is studied deeply,and a detailed method for selecting the safety control standard of blasting vibration is given.(5)Through the numerical simulation analysis of the localized damage model of the basaltic basalts of Baihetan,and compared with the measured data,the coincidence degree is good.By calculating the measured sound wave and vibration data of Baihetan,the fitting law of the upper slope damage increment and the blasting vibration velocity is obtained.