Study on optimization of blasting parameters of anchoring rock beam in the underground workshop of baise hydroelectric station

Technology of excavating anchoring rock beam is the most difficult and demanded in excavating underground factory,its quality will affect its safety of performing later.Engineer makes decision depended on his experience,project contrast and test in similar condition before deciding its parameter.Much time and expenditure are wasted by the way.Moreover,the result is not as expect as what we have.The optimum model for blasting parameters of anchoring rock beam is established and its blasting parameters are optimized by making use of a strong mapped function of the neural network technology with the typical samples of other practical smooth blasting parameters.The explosive types,the extent of joint development of rock mass,the diameter of bore-hole,the depth of bore-hole,the linear charge density,the burden line of least resistance and the spacing of bore-hole are considered as the primary factors.The experimental blasting parameters for anchoring rock beam are determined by the in-site blasting experiments of the protective layer and platform of rock mass in similar conditions.The results show that the in-site experimental blasting parameters are preferably identical to those of the optimum design.The acoustic wave examination indicates that the blasting effect is satisfied and its smaller loose ring of surrounding rock mass is obtained.