The grey prediction model provides a new way for predicting the time dynamic numerical array of mine gas emission rate.
灰色预测模型为矿井瓦斯涌出量时间动态数列的预测提供了一条新的途径。
The result shows that the average of absolute gas emission rate of the working face closes to the cutting speed of the shearer.
研究表明，工作面瓦斯涌出的总体平均水平与工作面采煤推进速度关系密切。
The principle of increasing gas emission rate by long hole blasting in the crossing hole is discussed. The radius cracked zone in coal seam caused by long hole blasting is calculated.
简要论述了深孔爆破提高瓦斯抽放的机理，以煤体中柱状装药爆炸后的裂隙圈半径进行了计算。
Under gassy coal seam condition, the full-heading development is employed. Because of the fast heading a high rate of gas emission arises.
在瓦斯含量较大的煤层采用综掘掘进巷道，由于掘进速度快，出现了瓦斯涌出量过大的现象。
The continuous emission process of gas bubbles under a constant gas flow rate through a single orifice immersed in a quiescent viscous liquid is studied.
考察一定流量气体，通过锐孔在静止黏性液体中连续溢出气泡的过程。
Calculates the natural ventilation rate by the tracer gas decay method. Explores the definition of the indoor criterion of carbon monoxide concentration and the carbon monoxide emission from cars.
利用示踪气体法计算了地下停车库的自然通风量，并讨论了地下汽车库内一氧化碳允许浓度和小汽车一氧化碳排放量的确定。
Calculates the natural ventilation rate by the tracer gas decay method. Explores the definition of the indoor criterion of carbon monoxide concentration and the carbon monoxide emission from cars.
利用示踪气体法计算了地下停车库的自然通风量，并讨论了地下汽车库内一氧化碳允许浓度和小汽车一氧化碳排放量的确定。
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