Jul 22, 2025

US12366679 - Method and device for identifying full-section excavation parameters of large-section tunnel with broken surrounding rock

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.

Assignee: China Railway Eleventh Bureau Group Co., Ltd Wuhan University of Technology China Railway Eleventh Bureau Group Fourth Engineering Co., Ltd. Wujiu Railway Passenger Dedicated Line Hubei Co., Ltd Southwest Jiaotong University China Railway Seventh Group Co., Ltd. Wuhan Institute of Geotechnical Mechanics, Chinese Academy of Sciences China Railway Southwest Scientific Research Institute Co., Ltd
Inventors: Jun Gao, Zhongyi Zhang, Xiao Lin, Xiaowei Zuo, Kaiwen Liu, Ming Zhang, Bin Zhou, Feng Wang, Yuxin Gao, Huiling Xue, Ling Wang, Zhengyi Wang, Xiaokai Wen, Yongtai Wang, Dan Xu, Ke Chen, Tenghui Xu, Zhiguo Liu, Yongguo Qi, Geng Chen, Songzhen Li, Junlei Zhou, Juntao Kang, Chunfeng Meng, Dongsheng Xu, Linyue Gao
Filing date: 2024-10-11

The patent describes a method and device for accurately determining excavation parameters in large-section tunnels with broken surrounding rock by using a three-dimensional finite element model and thermal imaging information. This approach allows for the calibration of blasting hole arrangements to meet specified quality standards, improving the efficiency and safety of tunnel excavation operations.

Claim 1

A method for identifying full-section excavation parameters of a tunnel with broken surrounding rock, comprising: establishing a three-dimensional finite element model based on a blasting section design of the tunnel; performing a simulation with the three-dimensional finite element model based on multiple groups of blasting design parameters to obtain blasting quality parameters; selecting a group closest to a preset quality parameter from the 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, wherein the first hot spot is a same heat source generating unit arranged at a selected blasting hole point actually measured on the surface to be blasted based on the target blasting design parameters before a blasting hole arrangement; and calibrating actual hole spacing parameters based on the first thermal imaging information and the target blasting design parameters; wherein a hole spacing of a marked blasting hole is obtained by comparing spacings of the first hot spot on the first thermal imaging information and a blasting hole in the target blasting design parameters, so as to obtain the marked blasting hole with a deviation, wherein field personnel are capable of readjusting the marked blasting hole with the deviation to meet requirements in the target blasting design parameters. establishing a three-dimensional finite element model based on a blasting section design of the tunnel; performing a simulation with the three-dimensional finite element model based on multiple groups of blasting design parameters to obtain blasting quality parameters; selecting a group closest to a preset quality parameter from the 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, wherein the first hot spot is a same heat source generating unit arranged at a selected blasting hole point actually measured on the surface to be blasted based on the target blasting design parameters before a blasting hole arrangement; and calibrating actual hole spacing parameters based on the first thermal imaging information and the target blasting design parameters; wherein a hole spacing of a marked blasting hole is obtained by comparing spacings of the first hot spot on the first thermal imaging information and a blasting hole in the target blasting design parameters, so as to obtain the marked blasting hole with a deviation, wherein field personnel are capable of readjusting the marked blasting hole with the deviation to meet requirements in the target blasting design parameters.

Google Patents

https://patents.google.com/patent/US12366679

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12366679