<abstract xmlns="http://www.w3.org/1999/xhtml">

The fire behaviour and smoke behaviour of a fire in an underground mine will be largely dictated by the heat release rate of the fire. The heat release rate per unit area is generally the output from small-scale fire experiments and can be applied for larger objects with varying surface area. This paper studies the impact of varying heat release rate per unit area for fires in materials and substances typically found underground. Data from earlier fire experiments were analysed and discussed, and several different heat release rate curves and flame spread velocities for various fuel components were developed and discussed. It was found that the hydraulic hose presented the highest peak heat release rate per unit area of the solid fuel items, followed by the low-voltage cable, cab interior, and tyre in descending order. The increase in the peak heat release rate was highest for the highest incident heat flux levels, representative for scenarios underneath a mining vehicle. The heat release rate per unit area of pool fires underneath a vehicle is significantly higher than a corresponding free burning case - attributed to the higher incident heat flux – but a gravel surface underneath a pool fire will reduce the heat release rate considerably. Line fires in larger bundles of electrical cables were modelled and found to attain the peak flame spread velocity more rapidly compared with a fire in hydraulic hoses. This was caused by the higher heat release rate of the initial fire and ignited segments in the electrical cable case.
</abstract>

Varying Heat Release Rates per Unit Area – The Impact in Underground Mines

<abstract xmlns="http://www.w3.org/1999/xhtml">

As the extension of the valid periods for lignite exploitation licenses in the current perimeters in the Oltenia basin is considered (except for those perimeters that will deplete the exploitable resource) until the horizon of the year 2030 (possibly even 2035), it is crucial to ensure that extractive activities take place under safe conditions, and, above all, under legal conditions regarding environmental protection. Despite the significant and undeniable negative effects of current lignite mining, this industrial sector has multiple possibilities at its disposal to minimize the negative impact on the environment and, moreover, to restore affected areas. In this context, within this paper, our goal is to identify, describe, and evaluate the environmental impact produced by lignite mining activities in the Jilț North open pit. To achieve this, well-known and recommended techniques and procedures from the specialized literature are used, taking into account the legislative provisions stipulated by Emergency Ordinance no. 195/2005 on environmental protection (approved by Law no. 265/2006) and the Mines Law no. 85/2003, as well as the guidelines outlined for anthropogenic impact assessment by Law no. 292/2018.
</abstract>

University of Petrosani, Faculty of Mining

Department of Mining Engineering, Surveying and Constructions

A Brief Study to Assess the Environmental Impact Generated by Jilț North Open Pit

<abstract xmlns="http://www.w3.org/1999/xhtml">

Starting from the interdependence of tourism - mountain environment - rural environment - sustainable development, four solutions are proposed and developed in the work as an alternative to mining in the area: tourist village, medicinal plant and forest fruit processing line, milk processing line, cardboard packaging line.
</abstract>

A Possible Alternative to Mining in Valea Jiului

<abstract xmlns="http://www.w3.org/1999/xhtml">

The paper follows the unfolding of the history of Romanian mining in its several major stages: the beginnings until the conquest of Dacia by the Romans, mining in Dacia during the Roman rule, mining activity after the Romans left Dacia until the 10th century, mining activity during the Middle Ages, mining during the capitalist period, Romanian mining during 1948–1990, Romanian mining after 1990, a possible future of Romanian mining and ends with some considerations regarding mining and the environment.
</abstract>

Romanian Mining - Past, Present and a Possible Future

<abstract xmlns="http://www.w3.org/1999/xhtml">

Gas extraction is affected by the presence of condensate and water in the extraction wells, with gas flow decreasing as the liquid rate increases. In this case, it is unnecessary to increase the recovery factor by increasing the gas flow rate. That is precisely why the technique of dilating the pores of the rocks through an abrasive effect is useful in this operation. In this paper is presenting abrasive flow rate in test to dilating pores of the gas well.
</abstract>

A Case Study to Using Acid Soluble Abrasive Materials for Hydra Jetting Gas Well

<abstract xmlns="http://www.w3.org/1999/xhtml">

Constanta Port is the largest port on the Black Sea. Only here are operated the largest ships that have access through the Bosporus and Dardanelles straits. Of these, the largest tonnage is operated in berths 80 – 84 belonging to COMVEX SA. In the port there are also terminals for operating bulk cargo belonging to SOCEP and Minmetal.
During the operation of ships, transport and storage of bulk cargo, basic activities of the terminal, losses of bulk materials occur, which periodically collected are waste because they no longer meet the original characteristics of the goods.
According to GD 111/2002, these quantities of materials are called technological losses and are a mixture of iron ore, bauxite, coke and coal. The mineral components of this waste, defined as mineral waste, are from the handled materials, and which are of the highest quality.
This quantity cannot be shipped to customers and therefore the respective quantities of goods represent operating and storage losses. Periodically, this mixture must be removed so that the land surfaces on which the stacks of materials are formed remain clean.
The production of mineral waste is closely linked to the activity of the Ore Terminal. The mineral mixture from cleaning operations is stored in temporary storage dumps. In addition to the fact that these quantities of goods represent losses, they also represent an impact on the environment.
The storage of this waste involves occupying important, available, adjacent areas and sometimes production areas. This also has implications for the operator's handling capacity as it requires additional operations involving energy consumption, labour consumption, vehicle use, etc. In conclusion, this scenario negatively affects the economic and social development of the company operating with bulk materials.
Due to the specificity of the bulk cargo handling terminal, between 1991 and until now, significant quantities of mineral waste valued at approx. 650.000 t.
Similar wastes are a characteristic of large ports, which transit such bulk goods, such as: Rotterdam – EMO operator – Netherlands, Dunkirk and Sollac sur Mer – France, Tianjin – China.
</abstract>

The Origin of Mineral Waste from Constanta Port and the Necessity to Introduce it into the Circular Economy

<abstract xmlns="http://www.w3.org/1999/xhtml">

We would like to think that Maramureş mining and thematic philately had a common destiny. The merging of the two areas of interest, although it started timidly, has continued to capture the public's interest more and more frequently in the period after 1988 and up to the present. Through the present work, we aimed to highlight the philatelic elements (postage stamps, first day of issue envelopes/FDCs, illustrated postcards, special and anniversary envelopes, maximum postcards, etc.) that appeared and promoted part of the activity of local mining, especially the one in Maramureș County. The identification, indexing, analysis, and description of the philatelic pieces were carried out starting from the existing material on several specialist websites with a philatelic profile and e-commerce platforms (Allnumis®, Colnect®, Delcampe®, eBay®, Jurnalul Filatelic, Romfilatelia, WOPA+®, WorldStamps®, etc), as well as that placed at the disposition of colleagues, philately enthusiasts and frantic collectors. The results of our current research have materialized in an impressive series of manifestations of the creation of Maramuresi philatelists, who have not forgotten for a moment that the basis of local development in the past was mining, through its economic, operational, and cultural contribution.
</abstract>

Technical University of Cluj-Napoca - North University Centre of Baia Mare

University of Agricultural Sciences and Veterinary Medicine from Cluj-Napoca

Technical University of Cluj-Napoca - North University Centre of Baia Mare, Faculty of Letters

Department of Specialty with Psychopedagogical Profile

Philatelic Testimonials of Maramures Mining (II): The Peak of the Local Philatelic Movement

<abstract xmlns="http://www.w3.org/1999/xhtml">

Corrosion is a major factor responsible for failures and leaks in gas pipelines. In the context of external corrosion, the internal pressure within pipes can create stress and strain concentrations in the area affected by corrosion. These phenomena, combined with the presence of cavities or cracks resulting from the corrosion process, amplify the risk of pipeline failure. As corrosion reduces the wall thickness of the pipe, its ability to withstand internal pressures decreases significantly. Consequently, a pipe affected by corrosion may collapse at a much lower pressure compared to a pipe that has not been subjected to corrosion.
With a view to analyse and anticipate the behaviour of corroded pipes, finite element modelling is used, implemented through the Abaqus software. This tool allows for simulating the mechanical effects of internal pressure on the gas pipeline structure, thereby providing the ability to predict the pipeline's behaviour under various pressure conditions. This approach aids in identifying and assessing risks associated with corrosion, facilitating the implementation of suitable preventive and maintenance measures to ensure the integrity and functionality of gas pipelines.
</abstract>

‘Gheorghe Asachi’ Technical University Iași

Analytical Examination of Deformational Dynamics in Above-Ground Pipelines Compromised by Corrosion Under the Influence of Internal Pressurization

AHEAD OF PRINT

Volume 30 (2024): Issue 1 (March 2024)

Volume 29 (2023): Issue 4 (December 2023)

Volume 29 (2023): Issue 3 (September 2023)

Volume 29 (2023): Issue 2 (June 2023)

Volume 29 (2023): Issue 1 (March 2023)

Volume 28 (2022): Issue 4 (December 2022)

Volume 28 (2022): Issue 3 (September 2022)

Volume 28 (2022): Issue 2 (June 2022)

Volume 28 (2022): Issue 1 (March 2022)

Volume 27 (2021): Issue 4 (December 2021)

Volume 27 (2021): Issue 3 (September 2021)

Volume 27 (2021): Issue 2 (June 2021)

Volume 27 (2021): Issue 1 (March 2021)

Mining Revue

 Revista Minelor/Mining Revue (MinRv), ISSN-L 1220-2053/ISSN 2247-8590, is an official journal of the University of Petrosani, Romania, published quarterly both printed and online.  It is an international open-access, peer-reviewed journal focusing on the development and exchange of scientific and technical aspects (novelties) in the broad field of mining sciences.  We welcome contributions (research papers, reports and reviews) presenting original theoretical, experimental studies and computer simulation and modelling, including but not limited to, the following topics:   Underground/Open Pit Mining (mining technologies, stability of underground mining workings, blasting, ventilation, tunnelling);  Mining mechanization, mining transport, deep hole drilling;  Rock mechanics and geotechnical engineering;  Geology and mine surveying;  Hydrogeology (hydrogeology of surface and underground mining, mine water, dewatering and rebound);  Environmental impact assessment;  Mine waste management;  Raw materials extraction, utilization and processing;  Mine closure and site reclamation;  Occupational health and safety;  Mine planning and design;  Mining process control and optimization;  Reliability, maintenance and overall performance of mining systems;  Risk assessment and management in mining and mineral engineering.   The editors will consider papers on other topics related to mining and environmental issues.  All published research articles in this journal have undergone rigorous peer review, based on initial editor screening and review by independent experts.  The journal is intended for academic scientists, industry and applied researchers, and policy and decision makers.  All necessary information about publishing in Revista minelor – Mining Revue can be found on our website. In addition, the available archive of the journal from 2021 in open access as well as the previous volumes (older than 2021) can also be found on the website of the UNIVERSITY OF PETROȘANI, at www.upet.ro/revistaminelor/eng.php   Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 