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《煤矿安全技术》1983年第 2、3期中,曾分别讨论了矿井风压、风量变化与瓦斯涌出量的关系。这里,我们将利用这些关系来讨论矿井生产中所遇到的一些实际问题──矿井停风、反风时的瓦斯涌出状况。 矿井主要扇风机停运 后的瓦斯涌出量 矿井主扇停运后,风机机械风压的作用消失了,并过渡到自然风压起作用。根据我们的观察,过渡时间大约两分钟。这是一次通风状态的大变化。它所引起的矿井瓦斯涌出量变化是通风绝对压力(点压)和通风量
In the second and third periods of 1983, “Coal Mine Safety Technology”, the relationships between the wind pressure, the change of air volume and the gas emission were discussed respectively. Here, we will use these relationships to discuss some of the practical problems encountered in mine production - the cease-fire in the mine and the gas emission during the anti-wind. After the main fan of the mine is out of operation, the amount of gas emission after the shutdown of the main shaft of the mine ceases and the effect of the mechanical wind pressure of the fan disappears and the transition to the natural wind pressure takes effect. According to our observation, the transition time is about two minutes. This is a big change in ventilation. The gas emission caused by it varies with the absolute ventilation pressure (point pressure) and ventilation