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.

Settore: Energia

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Coal

fattore di sicurezza

Minerario; Carbone

1. A calculated ratio of strength divided by actual applied load. 2. The minimum ratio of safety required by law, standard or specification.

ventilatore, booster

Minerario; Carbone

Collocati in posizioni strategiche in una miniera, questo ventilatore è utilizzato per aiutare nella ventilazione.

segnale di ventilazione

Minerario; Carbone

An alarm that will signal when there's a problem with the main fan.

ventilazione naturale

Minerario; Carbone

Ventilazione senza l'uso di mezzi artificiali, come ventilatori o altri dispositivi.

causa

Minerario; Carbone

A crack or break in the earth's surface as a result of shifting tectonic plates.

roccia competente

Minerario; Carbone

Rock that is structurally sound enough to have openings without the need of structural support.

minatore continuo

Minerario; Carbone

A large machine that mines and loads at the same time. It operates by scrapping coal from a vain with tungsten carbide teeth and accounts for about 45% of coal mining.