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Progress and Outlook of the Study on Blast Hole Optimization and Control Technologies for Tunnel Smooth Blasting
(1. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055; 2. Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi'an 710055; 3. The First Engineering Co., Ltd. of China Railway Beijing Engineering Group, Xi'an 710100)
Abstract The New Austrian Tunnelling Method (NATM) is the mainstream method for the tunnel works in China, and smooth blasting as a key part of NATM has been widely applied. Under certain special geological conditions,many factors that affect smooth blasting will result in poor result of smooth blasting and unsafe vibration velocity of blasting. Given this problem, the current situation and the results of the research into the blast hole optimization and control technologies for smooth blasting have been reviewed and summarized. Then the shortcomings of the current research are analyzed, i.e. the blast hole form and parameters are selected without any uniform standard, so it is necessary to conduct further research from the theoretical perspective. The control technology will optimize the result of smooth blasting, but there is no quantitative standard for selecting the charge structure, there is no quantitative method for selecting the delay time of detonation network, and there has been no study on combined application of multiple optimization technologies for intelligent blasting. At last, this paper offers an outlook on the progress of blast hole optimization and blasting control technologies for tunnel smooth blasting, and notes that standardization of blast hole design, theorization of control technology and intelligentization of blasting technology will be priorities in the future research.
Abstract：
The New Austrian Tunnelling Method (NATM) is the mainstream method for the tunnel works in China, and smooth blasting as a key part of NATM has been widely applied. Under certain special geological conditions,many factors that affect smooth blasting will result in poor result of smooth blasting and unsafe vibration velocity of blasting. Given this problem, the current situation and the results of the research into the blast hole optimization and control technologies for smooth blasting have been reviewed and summarized. Then the shortcomings of the current research are analyzed, i.e. the blast hole form and parameters are selected without any uniform standard, so it is necessary to conduct further research from the theoretical perspective. The control technology will optimize the result of smooth blasting, but there is no quantitative standard for selecting the charge structure, there is no quantitative method for selecting the delay time of detonation network, and there has been no study on combined application of multiple optimization technologies for intelligent blasting. At last, this paper offers an outlook on the progress of blast hole optimization and blasting control technologies for tunnel smooth blasting, and notes that standardization of blast hole design, theorization of control technology and intelligentization of blasting technology will be priorities in the future research.
LI Jinhang1 SONG Zhanping1,
2 YANG Pengtao3 PAN Hongwei1,
2 TIAN Xiaoxu1 etc
.Progress and Outlook of the Study on Blast Hole Optimization and Control Technologies for Tunnel Smooth Blasting[J] MODERN TUNNELLING TECHNOLOGY, 2024,V61(1): 36-47
2024, Vol. 61 