• Integrated sequential hole delayed blasting and pre-splitting blasting for vibration control in cooperative sublevel filling mining. • Pre-splitting blasting combined with sequential initiation further decreased PPV by 35.74% via dual synergistic mechanism. • Field tests confirm preserved surrounding rock integrity via synergistic vibration control. • Surface initiation network for ore-drawing holes adopted a V-shaped (goose-shaped) connection for single-trigger blasting. • A 3D LS-DYNA model with JH-2 constitutive model reliably simulated blasting dynamics and damage. In mining, controlling blast-induced vibration is crucial for ensuring the stability of the surrounding rock, especially when employing high-intensity mining methods near critical structures. To address intense blasting vibrations threatening stope stability in sublevel filling mining, this study integrates sequential hole blasting and pre-splitting blasting into a mechanized cooperative extraction system for vibration control at the source and along the propagation path. A 3D numerical model was developed using LS-DYNA to simulate the dynamic response. The study systematically compared and analyzed the blasting damage and vibration effects under three delayed detonation modes—two rows, single row, and sequential holes—and further explored the synergistic vibration reduction mechanism of pre-splitting blasting. Numerical simulation results demonstrate that sequential initiation effectively disperses energy and mitigates stress wave superposition, yielding an average peak particle velocity (PPV) of 1.9388 m/s. This represents a 35.93% reduction compared to the two-row scheme and a further 9.91% reduction versus the single-row scheme. The pre-split surface acts as a wave impedance barrier, blocking stress wave propagation. Combined with sequential initiation, it creates a dual synergistic vibration reduction mechanism of “active source control” and “passive path isolation,” further reducing average PPV by 35.74%. This study, grounded in the engineering context of underground sublevel filling mining, validated the reliability of numerical simulation results through field industrial trials. Application of this technology yielded well-preserved surrounding rock integrity in the mining area, achieving simultaneous improvements in safety and production efficiency. The findings prove that integrating synergistic mining techniques with blasting control effectively resolves the conflict between efficient ore extraction and surrounding rock stability.
Liu et al. (Wed,) studied this question.