coal-seam gas的意思|示意

Gas concentrations drop, and the effective gas drainage period of holes is shortened, because pores and cracks in the coal seam become completely developed after gas drainage.

针对煤层钻孔抽放瓦斯后煤层孔隙裂隙发育致使瓦斯浓度下降，钻孔有效抽放期缩短的技术难题，首次提出二次封孔方法。

It is suggested that coal lithological types with high content vitrinites have better physical behavior conditions for coal seam gas accumulation.

提出了镜质组含量高的煤岩类型有较好的煤层气储集物性条件。

Being influenced by the dual factor of the coal seam gas pressure difference and ventilation, the coal seam is the main route at the later period of the gas release.

受煤层瓦斯压力差和煤层的透气性双重因素影响，煤层是瓦斯后期释放的主要通道。

So it is feasible used the logging data to forecast coal seam gas content, and the applied value is enhance further.

证明用测井资料预测煤层瓦斯含量是可行的，从而进一步加强了测井资料的实际应用价值。

When the protective coal seam is mined, the gas management on the protected coal seam is a very important job.

保护层开采时，对被保护层的瓦斯治理是一项非常重要的工作。

Little faults in coal seam are important for coal and gas outburst prevention and control, and water outburst prevention and control.

煤层小断层对矿井煤与瓦斯突出及矿井突水防治具有重要的实际意义。