A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.
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Demonstrated reserves — A collective term for the sum of coal in both measured and indicated resources and reserves. Deposit — Mineral deposit or ore deposit is used to designate a natural occurrence of a useful mineral, or an ore, in sufficient extent and degree of concentration to invite exploitation.
87144. 34231. 87110. 34231. 87144. 32220. 87110. Complete OFO Version 2017 OFO Code Description 2017-1 MANAGERS Managers plan, direct, coordinate and evaluate the overall activities of enterprises, governments and other organizations, or of organizational units within them, and formulate and review their policies, laws, rules and regulations.
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Technologies de l'information et de la communication (TIC : transcription de l'anglais information and communication technologies, ICT) est une expression, principalement utilisée dans le monde universitaire, pour désigner le domaine de la télématique, c'est-à-dire les techniques de l'informatique, de l'audiovisuel, des multimédias, d'Internet et des télécommunications qui permettent ...