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

Wuhan University

Southwest Jiaotong University

Anhui China Railway Engineering Technology Service Co., Ltd

China Railway Fourth Bureau Group Co., Ltd

China Railway Seventh Group Co., Ltd.

Dan Xu

Jun Gao

Ming Zhang

Xiao Lin

Zhengyi Wang

Bin Zhou

Ling Wang

Xiaokai Wen

Huiling Xue

Feng Wang

Yuxin Gao

Yongtai Wang

Xiaowei Zuo

Liyun Yang

Ke Chen

Kaiwen Liu

Zhongyi Zhang

Yongguo Qi

Junlei Zhou

Juntao Kang

Zhiguo Liu

Dongsheng Xu

Chunfeng Meng

Tenghui Xu

Geng Chen

Linyue Gao

Songzhen Li

Disclosed are a method and a device for identifying full-section excavation parameters of large-section tunnel with broken surrounding rock, capable of solving the problem of inaccurate arrangement of blasting hole points in tunnel excavation engineering, and including the following steps: establishing a three-dimensional finite element model based on a blasting section design of a tunnel; performing a simulation with the three-dimensional finite element model based on blasting design parameters to obtain blasting quality parameters; selecting a group closest to a preset quality parameter from multiple groups of the blasting design parameters as target blasting design parameters, wherein the preset quality parameter is an acceptance grade standard of the tunnel; obtaining first thermal imaging information of a first hot spot of a surface to be blasted; calibrating actual hole spacing parameters based on the first thermal imaging information and the target blasting design parameters.

Method and device for identifying full-section excavation parameters of large-section tunnel with broken surrounding rock

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

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Wuhan, China

Dan Xu