Jun 23, 2026

US12663248 - Method for evaluating deep-buried tunnel blasting parameters

The invention provides a method for evaluating deep-buried tunnel blasting parameters, and belongs to the technical field of mine engineering. The method comprises: setting multiple diverse blasting schemes; selecting a plurality of test sections with the same geological characteristics, the number of the test sections corresponding to the number of the blasting schemes; blasting the test sections using the blasting schemes, and obtaining diversified monitoring data of each test section; and comparing the diversified monitoring data to select the optimal blasting schemes for the test sections. According to the method for evaluating the deep-buried tunnel blasting parameters, by implementing different blasting schemes in test sections with the same geological characteristics, diversified monitoring data of the test sections are obtained and compared to select the optimal blasting schemes for the test sections, so as to ensure the safety and quality of blasting excavation of deep-buried tunnels.

Assignee: Sichuan University
Inventors: Nuwen Xu, Biao Li, Quanfu Ding, Haoyu Mao, Peiwei Xiao, Xiang Zhou, Xinchao Ding, Yuepeng Sun, Yong Xia, Jun Liu, Zhiqiang Sun
Filing date: 2023-09-05

The patent describes a method for evaluating blasting parameters in deep-buried tunnels by implementing multiple blasting schemes across test sections with identical geological characteristics. It involves collecting and comparing various monitoring data to determine the optimal blasting scheme, ensuring safety and quality in tunnel excavation.

Claim 1

1 . A method for evaluating deep-buried tunnel blasting parameters, comprising: setting at least two different blasting schemes; selecting at least two test sections with same geological characteristics, the at least two different blasting schemes corresponding to the at least two test sections, respectively, and a number of the at least two test sections corresponding to a number of the at least two different blasting schemes; blasting the at least two test sections using the at least two different blasting schemes, respectively, and obtaining various monitoring data of each of the at least two test sections, wherein the various monitoring data include a vector resultant velocity and a risk distance, an unblasted hole rate, a rock wave velocity and a broken rock zone thickness, overbreak and underbreak situations of typical fracture surfaces of the each of the at least two test sections; and comparing the obtained various monitoring data among the at least two test sections to select an optimal blasting schemes for the at least two test sections; wherein the obtaining various monitoring data of each of the at least two test sections comprises: conducting blast vibration monitoring, broken rock zone monitoring, and three-dimensional laser scanning on the at least two test sections; calculating the vector resultant velocity and the risk distance based on vibration monitoring data obtained from the blast vibration monitoring; calculating the unblasted hole rate; calculating the rock wave velocity and the broken rock zone thickness based on acoustic wave test results of broken rock zone monitoring; and obtaining the overbreak and underbreak situations of typical fracture surfaces based on 3D point cloud data obtained from the three-dimensional laser scanning. setting at least two different blasting schemes; selecting at least two test sections with same geological characteristics, the at least two different blasting schemes corresponding to the at least two test sections, respectively, and a number of the at least two test sections corresponding to a number of the at least two different blasting schemes; blasting the at least two test sections using the at least two different blasting schemes, respectively, and obtaining various monitoring data of each of the at least two test sections, wherein the various monitoring data include a vector resultant velocity and a risk distance, an unblasted hole rate, a rock wave velocity and a broken rock zone thickness, overbreak and underbreak situations of typical fracture surfaces of the each of the at least two test sections; and comparing the obtained various monitoring data among the at least two test sections to select an optimal blasting schemes for the at least two test sections; wherein the obtaining various monitoring data of each of the at least two test sections comprises: conducting blast vibration monitoring, broken rock zone monitoring, and three-dimensional laser scanning on the at least two test sections; calculating the vector resultant velocity and the risk distance based on vibration monitoring data obtained from the blast vibration monitoring; calculating the unblasted hole rate; calculating the rock wave velocity and the broken rock zone thickness based on acoustic wave test results of broken rock zone monitoring; and obtaining the overbreak and underbreak situations of typical fracture surfaces based on conducting blast vibration monitoring, broken rock zone monitoring, and three-dimensional laser scanning on the at least two test sections; calculating the vector resultant velocity and the risk distance based on vibration monitoring data obtained from the blast vibration monitoring; calculating the unblasted hole rate; calculating the rock wave velocity and the broken rock zone thickness based on acoustic wave test results of broken rock zone monitoring; and obtaining the overbreak and underbreak situations of typical fracture surfaces based on 3D point cloud data obtained from the three-dimensional laser scanning.

Google Patents

https://patents.google.com/patent/US12663248

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12663248