Gas content varies as depth of burial, the thickness of roof clay rocks, and working thickness.
瓦斯含量与煤层埋深、煤层顶板泥岩厚度、煤厚呈正相关关系。
Gas content varies directly with depth of burial and working thickness, depth of burial is the main factor which influence the gas emission of Qixing mine.
瓦斯含量与煤层埋深、煤厚呈正相关关系，煤层埋深是七星矿井瓦斯含量的主控因素。
Gas content varies directly with depth of burial and working thickness, depth of burial is the main factor which influence the gas emission of Qixing mine.
瓦斯含量与煤层埋深、煤厚呈正相关关系，煤层埋深是七星矿井瓦斯含量的主控因素。
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