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.

Industry: Energi

Tambah istilah baru

Contributors in Batu bara

Become a Contributors

Coal

pilar merampok

Pertambangan; Batu bara

Menghapus pilar dari kamar atau ruang.

nada

Pertambangan; Batu bara

Kecenderungan atau naik dari jahitan.

pneumokoniosis

Pertambangan; Batu bara

Juga dikenal sebagai penyakit paru-paru hitam, penyakit kronis adalah umum pada para penambang batubara dan disebabkan oleh bernapas dalam debu batu bara.