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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...

Anthropic activities involve the extraction of the transformation and use of natural resources. During the process of extraction at the surface or underground of useful minerals, particles or gases resulting from the natural rocking or release from the rock mass appear in the working environment. The process of transforming useful mineral substances is carried out on the surface in enclosed enclosures, involving the use of complex technological processes. During the course of these technological processes, explosi...

The activity of evaluation and verification of industrial ventilation installations has a strong preventive role in terms of explosion risk mainly due to the fact that of the three determining elements that can lead to an explosion phenomenon, ventilation installations can determine the presence of two elements namely the presence of fuel (gases, vapors, dusts, mists) and the source of initiation (hot surface, flame, sparks of mechanical origin, electrical sparks, static electricity, etc.). The development of expe...

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...

A ventilation system is defined by performing air exchanges between the indoor and outdoor environment with the purpose of creating environmental conditions as close to the required thermal comfort conditions. Before installing a fan, it is necessary to analyze the space in which it is to be used and the method of compensating the exhaust air (mechanically with another fan or naturally with dimensioned grids). The most important factors to consider when choosing a fan are: the volume of the space, the number of sh...