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 gases and dust that affects the environment. The use of LM75A sensors allow us to accurately read the air temperature and transmit warning messages when certain temperature intervals are exceeded.

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 data with the values established by law. The results of our monitoring showed that the noise due to mining activities has a rather influential aspect in terms of occupational safety and security and does not directly affect daily life.

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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 dumps the first requirement was the removal of the vegetal layer from the soil surface, a requirement that was often not observed so that the environment was affected. This paper aims to show how the environment around the Vulcan coal mine was affected in 2020..