Rockgas outburst becomes more and more serious with the increase of mining depth.
随着煤炭开采深度的增加，岩石与瓦斯突出日益严重，其危害不亚于煤和瓦斯突出。
2
Methane is inflammable and explosion hazard gas as the basis of mash gas, firedamp and rockgas.
甲烷作为瓦斯、天然气、沼气等的主要成分，是易燃易爆气体。
3
From on production in 1997 to 2002, Paleozoic Erathem carbonate-rockgas pool in Changqing gas field has built up accumulative production capacity of 39.