Block cave mining method poses unique ventilation challenges compared to other underground metal mining methods. This research study focuses on assessing the airflow behavior in regulated airflow distribution systems by developing a 1:100 scaled block cave experimental model and a numerical model. This study also investigated gas flow behavior under various airflow conditions. Based on our findings, we observed that reduction in particle size and porosity of caved materials, decrease in cave footprint, and closure of undercut drifts would increase cave airflow resistance. The increased airflow is found beneficial for gas dilution regardless of its source locations, while the regulated airflow distribution system might deteriorate gas dilution situation when the source is located in the extraction drifts.

与其他地下金属开采方法相比，块状洞穴开采方法带来了独特的通风挑战。本研究的重点是通过开发 1:100 比例的块状洞穴实验模型和数值模型来评估调节气流分配系统中的气流行为。本研究还研究了各种气流条件下的气体流动行为。根据我们的研究结果，我们观察到洞穴材料的颗粒尺寸和孔隙率的减小、洞穴足迹的减少以及底切漂移的关闭会增加洞穴气流阻力。增加的气流被发现有利于气体稀释，无论其源位置如何，而当源位于提取漂移中时，调节的气流分配系统可能会恶化气体稀释情况。