Reasonable millisecond time control method for excavation blasting of tunnel

US11920472B2 · kind B2 · utility

Assignees

• China Railway Eleventh Bureau Group Co., Ltd · CN
• China Railway Eleventh Bureau Group Fourth Engineering Co., Ltd. · CN
• Wujiu Railway Passenger Dedicated Line Hubei Co., Ltd · CN
• CHINA RAILWAY FOURTH BUREAU GROUP CO., LTD · CN
• ANHUI CHINA RAILWAY ENGINEERING TECHNOLOGY SERVICE CO., LTD · CN
• Wuhan Institute of Geotechnical Mechanics, Chinese Academy of Sciences · CN
• China Railway Southwest Scientific Research Institute Co., Ltd · CN

Inventors

• Jun Gao · 红钢城街道, CN
• Liyun Yang · Beijing, CN
• Xiao Lin · 红钢城街道, CN
• Ming Zhang · Qingdao, CN
• Kaiwen Liu · Nanhu, CN
• Xiaowei Zuo · 红钢城街道, CN
• Bin Zhou · Zhaoqing, CN
• Feng Wang · 红钢城街道, CN
• Yuxin Gao · 红钢城街道, CN
• Dan Xu · Vernon Hills, US
• Ling Wang · 红钢城街道, CN
• Zhengyi Wang · Shanghai, CN
• Xiaokai Wen · 红钢城街道, CN
• Yongtai Wang · 红钢城街道, CN
• Huiling Xue · Beijing, CN

Key dates

• Filing date: Sep 20, 2023
• Grant date: Mar 5, 2024
• Expiry date: Sep 20, 2043

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F42D3/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A reasonable millisecond time control method for excavation blasting of a tunnel is provided, and includes: acquiring physical mechanical parameters to establish a millisecond blasting model, and designing four dimensions blasting parameters of explosive quantity, hole number, inter-hole millisecond and inter-row millisecond; simulating, based on the millisecond blasting model, a blasting process of an explosive package using blasting parameters to obtain a blasting vibration curve; obtaining single-hole blasting vibration waveforms, solving a vibration synthesis curve through a vibration synthesis theory; comparing the vibration synthesis curve with the blasting vibration curve to obtain a coupling relationship of blasting parameters; determining a target group of explosive quantity and hole numbers, determining a target millisecond through the coupling relationship of blasting parameters, and relating a millisecond blasting control strategy to control, and it is used for tunneling project to reduce cut blasting vibration intensity and achieve precise and intelligent control of millisecond blasting.