Work

Influence of Crustal Stress on Explosion Crack Propagation Behavior and Application in Shallow and Deep Buried Tunnel Engineering

Year: 2026

Type: article

Abstract: ABSTRACT Rational utilization of the guiding effect of crustal stress on explosive crack can significantly enhance blasting efficiency. This paper modified the calculation models for the crushed zone and fractured zone in tunnels at different burial depths and validated the models using numerical simulation methods. The influencing factors of blasting crack extension in deep and shallow buried roadways were analyzed, and the guiding significance of crack extension characteristics on the design of blasthole mesh parameters was discussed. The results show that the error in the theoretical calculations is controlled within 6%, indicating a high degree of accuracy. The longest radial main cracks appeared in the directions of 75°–90°, 70°–72°, and 74° in the blast holes for burial depths H ≤ h q , h q < H ≤ H P , and H > H P , respectively. Blasting yields optimal results when the blasthole alignment follows the direction of main fracture propagation.

Source: Fatigue & Fracture of Engineering Materials & Structures

DOI: 10.1111/ffe.70199

Authors: Yousheng Qian, Tiejun Tao, Liansheng Liu, Xingchao Tian, Shuai Song

Institutions: Guizhou University, Jiangxi University of Science and Technology, Guizhou Institute of Technology, Guizhou Polytechnic of Construction

Language: English

Topic: Blasting Impact and Analysis

Subfield: Building and Construction

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: bronze

Funder: National Natural Science Foundation of China