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Considering that the underground mining of coal is used mining systems that have a high degree of complexity, and can reach cumulative lengths of tens of kilometers, associated with them we have the ventilation networks with the role of transporting important air flows with the help of special ventilation systems. The aeration networks are made up of all the mining works on which air flows are carried. Structurally, they comprise nodes and branches. The nodes of an aeration network are generated by the intersectio...

In Romania, the production of coal and lignite depends on the national demand for primary energy resources in the electricity production sector and on the available resources / reserves. Although it still plays an important role in the mix of electricity production and the safety of the National Energy System, especially in the winter, coal-fired electricity production is decreasing even this season. The considerations for which this situation was reached are: the programs for extractive industry reorganization an...