gas coal

Many ventilation methods have adopted, but no one could bring gas coal dust under control entirely.

虽然采取了许多通风方法, 但是都不能彻底治理综掘工作面的瓦斯、煤尘.

Research on prediction of creep collapsing time for uncovering gas coal plane

瓦斯煤层裸露面蠕变失稳的时间预测研究

The summery of the results as follows: The influence of typical alkali and alkaline metals to the reactivity of coke from gas coal is lower than it from coking coal.

研究结果表明：添加碱金属、碱土金属对气煤焦炭反应性的影响小于对焦煤焦炭的影响。

The cold mechanical strength almost not change under the optimal bulk density, while thermal property change a lot which is largely affected by coal. So, the coke of gas coal has a good cold strength, but thermal property is poor.

最佳堆密度下的焦炭冷态强度基本不变，而热性质变化较大，主要受煤质影响，所以气煤焦炭尽管有较好的冷态强度，但热态强度仍较差。

Changes in low temperature oxidation process of gas coal chemical base agglomerate

气煤的化学基团在低温氧化过程中的变化