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。
Two high concentration of CO_2 processing and background showed the biggest transpiration rate in heading stage, followed by jointing stage, tillering stage relatively small trend.
两种高CO_2处理和背景浓度均呈现出抽穗期蒸腾速率最大，拔节期次之，分蘖期相对较小的趋势。
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