Abstract:
On the basis of collecting the domestic and foreign research data,the research status of the influence of joint rock mass on tunnel drilling and blasting excavation is summarized. The space production of the joint in the rock mass,the distance from the blasting hole,the filling material and the ground stress in the rock mass will have a great impact on the propagation of the blasting stress wave. When designing the blasting parameters in the engineering,the blasting scheme should be optimized according to the propagation law of different working conditions. It is believed that because the current conclusions are mostly regular and the overdue geological prediction technology cannot prove the specific location and filling information,the research results are less applied in practical engineering. Through the comparative analysis of the existing blasting parameter design method,the intelligent blasting parameter design method is more advantageous than the traditional method and the numerical simulation method. Finally,the development trend and key problems of tunnel drilling and blasting construction of rock mass joint are predicted,believing that the following four points will be the focus of future research: To quantify and deepen the influential law of blasting according to the existing computer technology joint. The quantification and deepening of the advanced prediction theory and technology of tunnel drilling and blasting method. Accumulation and expansion of data set of intelligent blasting parameters for tunnel drilling and blasting excavation. Focus on the cracks in the rock mass,and explore the model to reasonably quantify the interaction between cracks and joints,so as to improve the accuracy and safety of blasting design.