关键词: 爆破工程　井巷工程　掏槽爆破　模型试验　实验系统

Abstract: Cuttting blasting is the most critical technology for tunnel blasting excavation.At present,it is difficult to accu rately consider the action of in-situ stress field in the calculation and design of blasting parameters for deep tunnel excavation. This limitation directly compromises the effect of cutting blasting,leading to issues such as low utilization rate of blast holes, slow excavation progress,and poor quality of formed tunnels.Laboratory blasting model experiment is one of the effective meth ods to solve the above problems,and it is also an effective way to apply students understand the theoretical knowledge of cutting blasting and cultivate students′ blasting design and practical ability.In response to the existing challenges in blasting experi ment education,particularly the difficulties in conducting laboratory blasting experiment and the limited applicability of current experiment methods,this paper developed an innovative laboratory model test system for cutting blasting combined with the ac tual situation of the laboratory.The system consists of a three-dimensional electro-hydraulic servo loading system,a self-de signed large-scale composite loading steel frame,a high-speed camera testing system,a blasting effect experiment and analysis system,and a blasting model experiment module.This system can study and reproduce the rock breaking process and mecha nism of cutting blasting under various working conditions,and analyze cutting blasting rock breaking effects.The experiment system fully considers the characteristics of blasting engineering experiment,and analyzes the feasibility and safety of the exper iment system from the aspects of experiment process,experiment techniques,experiment hazards,and safety protection meas ures.The study results show that the implementation of this system has enhanced students′ intuitive understanding of rock blasting processes.Furthermore,it has effectively improved their operational competencies in handling complex experiment sys tems,fostered teamwork skills,and facilitated innovative research capabilities,thereby cultivating students′ overall innovative potential.The system not only provide scientific foundation for the study and optimization design of blasting mechanism in deep high stress tunnel excavation,but also meet the experiment teaching needs of undergraduate students and provide a platform for teachers and graduate students to conduct scientific research.

Key words: blasting engineering,tunnel engineering,cutting blasting,model test,experiment system