Practice and Analysis of Dynamic Mechanical Experiments of Low-Temperature Rocks in Blasting Engineering Educations

Abstract

Aiming at the issues of low restoration accuracy in dynamic mechanical experiments on low-temperature rocks and insufficient theoretical understanding of impact dynamics in traditional Blasting Engineering courses, this study innovatively developed a comprehensive experimental curriculum by integrating a low-temperature environmental chamber, split Hopkinson pressure bar (SHPB), and high-speed digital image correlation (DIC) technology. The curriculum encompasses the entire workflow, including frozen rock sample preparation, impact loading, and theoretical analysis of strength and failure characteristics. Adopting a progressive "theoretical cognition-dynamic observation-mechanism exploration" teaching model, it guides students to understand impact loading experimental principles, analyze temperature/strain rate effects on strength and energy dissipation, and achieve visual observation of transient rock failure processes. Teaching practice demonstrates that this approach effectively integrates abstract impact dynamics theories with quantifiable experimental data, enabling students to clearly comprehend temperature/strain rate influences on rock strength and failure characteristics. It significantly enhances theoretical understanding depth and scientific research innovation capabilities, laying a solid foundation for advanced studies in blasting engineering theories.