Deep underground metal mines are subjected to the long-term superimposed effects of high in-situ stress and cyclic blast-induced dynamic disturbance, making the surrounding rock prone to stress concentration, cumulative roof settlement, and intensified vibration response, which threaten stope stability and production safety. Existing mining parameter designs mostly rely on engineering experience and struggle to balance stope stability and production efficiency. To address this issue, a dynamic and static coupling optimization method for mining parameters was proposed to synergistically regulate factors such as stope span, pillar width, filling height, and explosive consumption. Dynamic response simulations based on a three-dimensional numerical model and field comparative verification were carried out. The results show that after the coordinated parameter optimization, the peak particle velocity (PPV) at a near-field distance of 10 m decreases from 31.3 cm/s to 14.5 cm/s, and the peak displacement of the bottom structure reduces from -0.64 cm to -0.18 cm. Within 24 hours after blasting, the mid-roof settlement droppes from 9.8 mm to 4.1 mm, and the height of the plastic zone extension in the roof decreases from 8.6 m to 5.1 m. These results demonstrate that the proposed parameter optimization method can effectively mitigate the effects of blast-induced disturbance, improve the stress state of the surrounding rock, and enhance stope structural stability, providing reliable optimization ideas and technical support for safe and efficient mining in deep mines.

Blast-induced dynamic disturbance  /  Deep metal mining  /  Dynamic and static analysis  /  Mining parameter optimization