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

A device for identifying full-section excavation parameters of a tunnel with broken surrounding rock, comprising:

• an establishment unit, used for establishing a three-dimensional finite element model based on a section design and a blasting design of the tunnel;
• a simulation unit, used for performing a simulation with the three-dimensional finite element model based on multiple groups of blasting design parameters to obtain blasting quality parameters;
• a selection unit, used for 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;
• an imaging unit, used for 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
• a calibration unit, used for 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.