Home > Industry/Domain > Energy > Coal

Coal

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.

Contributors in Coal

Coal

返回

Energy; Coal

是指屋頂或天花板礦井中。

回填

Energy; Coal

用於挖掘在一個地區,以支援回或從崩潰煤礦頂板完成後的材料。

螺旋

Energy; Coal

像設備用於運輸屑鑽旋轉軸向上的挖掘的螺絲。

輔助操作

Energy; Coal

任何和所有操作或與採礦沒有直接參與的活動。

含水層

Energy; Coal

多孔岩石,但最常見的砂岩的任何區域,收益率水。

背斜

Energy; Coal

岩地層兩邊都將下降。

btu

Energy; Coal

它稱為英國熱單位,是水的需要增加一磅的溫度由 1 華氏度的能量。

Featured blossaries

Notorious Gangs

Category: Other   2 9 Terms

start

Category: Other   1 1 Terms