The variety of gas content are related linearly with the depth of bedrock surface(not the depth of the ground surface),but the relationship are different in different gas geology cel.

• 结果表明:对煤层瓦斯含量的分析必须以瓦斯地质单元为区块;瓦斯含量变化与煤层距基岩面深度(而不是地面深度)有较好的线性相关性,但同一煤层的不同区块显示出不同的相关性。