The Numerical Simulation Of Rock Directional Blasting And Optimization Of Charge Structure

Based on the theory of explosion mechanics, the improvement for charge structurein rock blasting, which combines with the characteristics of the groove fracturecontrolled blasting method and cumulative explosion method are put forward in thispaper. Using the cumulative energy plate can improve the effective utilization of blastenergy and flexibly control the direction of rock fracturing.According to the dynamics of explosion and fracture mechanics, the paperestablishes the conservation equation of energy for rock blasting. The quality,momentum and energy conservation equations are derived for the pressure correctionequation. Alternative direction implicit iteration apply to solve the equation whichprovides the theoretical basis for the numerical simulation of directional splitting inrock blasting. This lays the foundation for solving the problem of rock blasting andestablish the contact between the physical model and mathematical model.In order to improve the quality of rock blasting, this paper consider four factorsincluding shape and angle of cumulative energy、coefficient of decoupling charge andcouple mediums to improve the efficiency of charge structure in rock blasting. In orderto analyse the influence factors of rock fracture, the dynamical finite element analysissoftware ANSYS/LS-DYNA is adopted. The results show that when the columndiameter is1cm, the decouple degree is four model, diamond shape charge structure isused, the effect of rock fracture will be the best. the spacing of60cm effectivepenetration could be run through. The crack bifurcation is effectively controlled.Compared with the double hole blasting, the effect for charge structure of usingdiamond shape in rock blasting is good. Compared with the groove fracture controlledblasting method, the charge structure of using diamond shape reducethe grooving process and meet the special requirements of rock cutting.