A new thought is proposed to forecast mineralization of endogenetic deposits based on metamorphic grade of coal.

据此提出了根据煤变质程度进行内生矿床成矿预测的新思路。

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Put the trained neural network, the indexes database of coal and gas outburst and other programs together constituted the system to evaluate the mine outburst dangerous grade.

训练好的神经网络、矿井煤与瓦斯突出指标数据库和其它程序绑定在一起组成了矿井突出危险等级评价系统。

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The Ohio river has been called the American Ruhr, As in Germany, the area along the river is rich in valuable deposits of high-grade coking coal and is well known for its steel industry.

俄亥俄河被称作美国的鲁尔河，就像德国一样，沿河有丰富的高品质的炼焦煤，并且因其钢铁而著名。

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By changing operating procedures and burning a higher grade of coal, Midwest boosted output from the 40-year-old plants 12% last year--while reducing emissions.

FORBES: Indigestion

There is the further issue of the quality of coal, since the majority of the world reserve is of lower thermal quality than the top-grade anthracitic coal, and will yield less energy per tonne either burned directly or in the form of syngas in ICGC plants.

FORBES: 'Clean Coal' Project Falters In U.K.

Coking coal is high grade coal used in the production of steel.

BBC: Rio Tinto raises bid for Australia's Riversdale