随着一年四季气温的改变,对于采用自然通风的小窑,不仅风量会改变,有时风向也会改变。对于采用机械通风的矿井,也同样受到自然风压的影响,这都是众所周知的。但应该指出的是,当矿井反风时,由于进风线路中有大型机电设备运转,产生大量热,受热风流的影响,有时达不到反风的预期效果。本文拟根据现场观测,谈谈关于对流的条件及其预防。 As temperatures change throughout the year, for small kilns that use natural ventilation, not only does the air volume change but also the wind direction may change. It is also well-known that natural ventilation should also be applied to mechanically ventilated mines. However, it should be pointed out that when the mine winds against the wind, large-scale mechanical and electrical equipment in the intake air line will generate a large amount of heat and may be affected by the hot wind, sometimes failing to achieve the expected result of the wind blast. This article intends to observe the conditions of the convection and its prevention according to the on-site observation.