Application of CO₂ fracturing blasting in mountain tunnel construction adjacent to existing structures

作者：Zhengfeng Li, Junshen Yuan, W.-C. Xie, Haipeng Wu, Jiayong Xiao, Yichang Wu, Chaoquan Pan · 发表于：Scientific Reports · 年份：2025 · DOI：10.1038/s41598-025-31846-w · 研究领域：Rock Mechanics and Modeling、CO2 Sequestration and Geologic Interactions、Structural Response to Dynamic Loads

As a novel rock-breaking technique, CO₂ fracturing blasting demonstrates distinct advantages in mountain tunnel construction adjacent to existing structures, characterized by minimal environmental disturbance and enhanced operational safety. However, under the premise of predefined safety protection objectives, research on the control of CO₂ fracturing energy release remains notably limited. This study investigates the phase-transition pressurization mechanism and process characteristics of CO₂ fracturing blasting. The energy released by a CO₂ fracturing device generating a peak pressure of 280 MPa was calculated quantitatively. Subsequently, a comprehensive safety verification methodology for CO₂ fracturing energyis proposed. Furthermore, an integrated quality control system encompassing parameter optimization, unmanned aerial vehicle monitoring, and vibration surveillance was developed and established. This system was successfully implemented in practical engineering applications, demonstrating promising potential for broader adoption in similar projects.