Coal seams gas content is basic parameter of gas prevention in coal mine, it make a great action of gas discharging quantity.
煤层瓦斯含量是矿井瓦斯防治的一个基础参数，它对矿井瓦斯涌出量的大小起着重要作用。
In the southwest of the Daniudi gas-field a great quantity of natural gas was discovered in He3 and He2 strata.
大牛地气田区块西南部盒3、盒2层位出现了很好的天然气显示。
In the southwest of the Daniudi gas-field a great quantity of natural gas was discovered in He3 and He2 strata.
大牛地气田区块西南部盒3、盒2层位出现了很好的天然气显示。
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