Chinese Academy of Sciences

China Railway Eleventh Bureau Group Co., Ltd

China Railway Eleventh Bureau Group Fourth Engineering Co., Ltd.

Wujiu Railway Passenger Dedicated Line Hubei Co., Ltd

China Railway Southwest Scientific Research Institute Co., Ltd

Anhui China Railway Engineering Technology Service Co., Ltd

China Railway Fourth Bureau Group Co., Ltd

Kaiwen Liu

Liyun Yang

Jun Gao

Xiao Lin

Ming Zhang

Feng Wang

Ling Wang

Xiaokai Wen

Huiling Xue

Yuxin Gao

Yongtai Wang

Bin Zhou

Xiaowei Zuo

Dan Xu

Zhengyi Wang

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.

Reasonable millisecond time control method for excavation blasting of tunnel

Growing community of inventors

Beijing, China

Kaiwen Liu