溜井是井下矿石转运的主要渠道,随着矿山生产能力的不断增长,溜井负担的中段数也随之增加,对井下空气的污染也日趋严重。因此,加强对溜井尘毒危害的控制,是一个急需解决的问题。多中段卸矿的主溜井,在卸矿过程中,由于矿石加速下落产生很大的冲击气流。这种冲击气流夹带大量粉尘,进入下部各中段的卸矿坑道,造成井下空气的严重污染,成 Chute is the main channel for underground ore transportation. As the mine’s production capacity continues to increase, the middle section of the chute will also increase and the pollution to the underground air will also worsen. Therefore, strengthening the control over the hazards of dust poisoning in the slipstream is an urgent problem to be solved. Multi-intermediate dumping of the main well, in the unloading process, due to the accelerated drop of ore to produce a great impact on the gas flow. This impact airflow entrains a large amount of dust, entering the lower part of the middle of the unloading tunnel, resulting in serious downhole air pollution into