Study on Influencing Factors of Single-hole Slit Shaped Blasting Effect in Horizontal Rock Strata
There are many factors affecting the effect of shaped charge blasting in horizontal rock strata of tunnels,and the influence of each factor on the propagation characteristics of blasting cracks is not clear.In order to solve this problem,a single-hole shaped charge blasting model was established by using finite element method,and its correctness was verified.The orthogonal numerical simulation test analysis of single hole in horizontal rock strata was carried out,and the influence of each factor on the effect of single-hole shaped charge blasting was revealed.The results show that the decoupling coeffi-cient has the greatest influence on the effect of single-hole shaped charge blasting in horizontal rock stra-ta.The propagation length of horizontal blasting cracks in rock mass,the length of filling joints and the damage range of surrounding rock in non-energy-gathering direction under shaped charge blasting are negatively correlated with the decoupling coefficient.Considering the influence of decoupling coefficient on blasting effect,the recommended value is given.
horizontal rock stratashaped charge blastingorthogonal testnumerical simulation
万方数据
维普
