To control the dust pollution caused by the unloading of a multilevel ore pass, numerical simulation and similar experiments were carried out to study the airflow and dust migration influenced by the unloading quantity and the continuous unloading at different time intervals in the ore pass. From this research, the following conclusions are drawn: when the first level of the ore pass is unloaded, the third and fourth levels are the main dust-producing positions, and the concentrations of dust in the breathing zone can reach 85 and 325 mg/m³, respectively. Increasing the unloading interval and reducing the total single unloading quantity can prevent the superposition of dust production. The foam dust removal technology can reduce the secondary dust generation caused by the backlash of the airflow in the ore pass, and the dust emission rate can reach 60% at the fourth level.

中文翻译：

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利用卸​​荷时间间隔和泡沫控制技术控制矿石通过粉尘的研究。

为了控制多道次卸矿对粉尘的污染，进行了数值模拟和类似的实验，研究了卸矿量和连续卸矿在不同时间间隔内对气流和粉尘迁移的影响。从这项研究得出以下结论：卸矿通道的第一级时，第三级和第四级是主要的粉尘产生位置，并且呼吸区域中的粉尘浓度可以达到85和325 mg / ³米， 分别。增加卸载间隔并减少总的单个卸载量可以防止粉尘产生的叠加。泡沫除尘技术可以减少由于矿石通道中气流的反冲引起的二次扬尘产生，第四级扬尘率可以达到60％。