Florin Flavius Soica

As a result of the exploitation of coal in the mines from the Jiu Valley, significant quantities of tailings result from the mining works, but also from the coal preparation processes. They are stored in piles of different sizes, placed on the ground horizontally or between mountains, piles called tailings dumps. For the construction of tailings du...

This paper studies the noise level near the mines in the Jiu Valley using the Bruel & Kjaer Noise Dose Meter Type 4448. The purpose of the paper is to determine the noise level and how it can be reduced so that it falls within the limits imposed by law. The monitoring was done for a period of three months, during which we analyzed and compared the...

The studied geographical area is situated in a intramontane region situated on the Jiu River called the Jiu Valley, where the main economic activity is mining. The importance of studying this area is related to the effect of coal mining on the climate. Coal extraction in the area led to a change of atmospheric temperature due to the emissions of ga...

Mining activities for the extraction and efficient use of mineral substances have opened the way to civilization, progress and well-being for many countries of the world, including Romania. This paper analyzes the intramontane area of the Jiu Valley. This paper is based on a public opinion poll conducted in Jiu Valley. The survey was conducted betw...

This paper analyzes and monitors an important environmental factor, namely air. This paper checks the air quality with the help of DSM501A sensors in the Jiu Valley. The device used in the paper uses the "DSM501A" dust sensor, which is one of the cheapest sensors on the market and is capable of detecting PM2.5 and PM10 particles.

In the coal preparation plant situated in Vulcan, a part of raw coal extracted from the mining units in the "Valea Jiului" is being processed. The small grit coal from circulating waters is concentrated with cyclone batteries and recovered and drained with the help of special screens. The fine tailings from residual water are directed into the slur...

Analiza, prelucrarea şi interpretarea principalilor indicatori rezultaţi în urma colectării probelor din decantoarele de şlam steril ale Preparaţiei Coroeşti drd.ing. Şoica Florin Flavius, conf.dr.ing. Egri Angela Rezumat În cadrul Preparaţiei Coroeşti, din Vulcan str. Preparaţiei nr.1, se prelucrează o parte din cărbunele brut extras de unităţile...

Lucrarea de faţă tratează aspecte legate de capacitatea autorităţilor contractante româneşti în ceea ce priveşte profesionalismul personalului din sistem şi integritatea acestuia. Majoritatea personalului care se ocupă de achiziții are pregătire profesională de inginer, economist, profesor, etc., iar cunoștințele de achiziții publice sunt dobândite...

This paper presents and analyzes the existing system for controlling the flow of coal on the conveyor with scrapers in a complex mechanized mining component in order to find a better adjustment system. The driving of the imprest and cutting system of mining machine is done by means of a squirrel-cage induction motor. Automatic adjustment of the flo...

After the implementation of the new Directives of European Union in the national public procurement system of Romania, the vast majority of public authorities has troubles making direct purchases – especially when using the dynamic purchasing system (SEAP). The new directives (theoretically) are meant to make purchasing easier, cheaper and should i...

After collecting the statistical data from the coal sample analyzing laboratory, using linear mathematical regression formulas, we determine the variation law of caloric power based on moisture and ash content of analyzed coal sample. After the calculation of the regression formula we fine tune it until we get the best degree of confidence – 99,60%...

Using mathematical regression formulas, we establish the laws of variation of the phenomenon of stress within the organization Lonea Mine, Hunedoara County in Romania and the confidence quotient in each law of variation. Depending on the number value of this ratio resulted from each method of regression after a comparison between them; we search in...

The purpose of this paper is to determine the shifting of the neutral point in the three-phase electrical networks used in coal mining.

This paper deals with the issue of creating a general legal framework for governing public procurement system in Romania in accordance with EU rules. With the accession of Romania to the European Union and thus entering the European Common Market, it is necessary a correlation of national legislation with the European one, given the competitive req...