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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...
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Runoff is a valuable water resource during seasonal freezing and thawing period in arid and semi-arid areas, and is of great significance to ecological restoration in coal mining subsidence areas. Through automatic in-situ monitoring of the dynamic changes of soil moisture and temperature inside and outside the coal mining subsidence area of differ...
Citations
... The main activity of the Jiu Valley since the interwar period is mining, and if in the past the area experienced a good development due to mining, now this area is considered disadvantaged due to the closure of mining. [2] Mining activities produce a series of pollutants that affect all components of the environment. Soil, one of the most important components of the environment is also the most affected by this industry, because the quantities of sterile material resulting from the preparation of coal are deposited on the soil surface in dumps, thus making changes in relief and occupying large areas of which may not be used for other purposes. ...
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..
... The PM 10 µm suspended particles were measured using the HPM32322550 sensor which uses laser-based light scattering to detect both 2.5μm and 10μm particles. Noise level was measured using a Noise Level Sensor sample [2][3][4]. ...
This paper studies how the activity of hydraulic excavators found in the Rosia quarry of Jiu affects the environment. For this study we chose the Caterpillar 323D L and 323 D LN hydraulic excavators. The study took place over a period of 30 days. These days we have collected data on the noise level and the level of PM 10 particles in the quarry. Caterpillar equipment not only helps to build a better world, but also helps to preserve the environment, which is so fragile today. The evolution of excavators has led to a more efficient way of working both in terms of production, costs and effects on the environment. Their efficient way of working has led to an increase in production and a decrease in the level of pollution in the Rosia Quarry area.
... At the national level, in cities with more than 250,000 inhabitants we find people exposed to noise above the limit provided by environmental standards, which means that for more than 60% of the population the quality of life is significantly affected by noise pollution [2][3][4][5][6][7]. ...
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.
... The current value is determined as in the range of ± 3.2A with 1% accuracy (El Hadi, 2021). LM75A temperature sensor is used for the range of -55°C~125°C with an accuracy of ± 0.125°C (Stanimirescu, 2020). The voltages values are gathered with ADC ports and voltage scaling circuit implementing with non-inverting amplifiers for the 32bit ARM microcontroller (Brown, G.,2012). ...
This paper studies the Roșia Jiu quarry area in Romania. This research highlights the working method of hydraulic excavators and the values of particles released into the atmosphere by them. Improving technological equipment not only helps build a better world, but also restores and preserves the environment. The measurements were made during 2020, using DSM501A sensors, which were located at four points in the quarry, namely in the north, southeast and west of the quarry.
