Mining Revue最新文献

{"title":"Varying Heat Release Rates per Unit Area – The Impact in Underground Mines","authors":"R. Hansen","doi":"10.2478/minrv-2023-0028","DOIUrl":"https://doi.org/10.2478/minrv-2023-0028","url":null,"abstract":"Abstract 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.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"45 9","pages":"1 - 28"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139191467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Philatelic Testimonials of Maramures Mining (II): The Peak of the Local Philatelic Movement","authors":"B. Cioruța, Ioana-Elisabeta Sabou Cioruța, Alexandru Pop, M. Coman","doi":"10.2478/minrv-2023-0034","DOIUrl":"https://doi.org/10.2478/minrv-2023-0034","url":null,"abstract":"Abstract 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.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"66 2","pages":"96 - 105"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analytical Examination of Deformational Dynamics in Above-Ground Pipelines Compromised by Corrosion Under the Influence of Internal Pressurization","authors":"Ladislau Radermacher, Cristian Rădeanu, Ludovic Călcîi","doi":"10.2478/minrv-2023-0035","DOIUrl":"https://doi.org/10.2478/minrv-2023-0035","url":null,"abstract":"Abstract 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.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"10 4","pages":"106 - 112"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139190704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Possible Alternative to Mining in Valea Jiului","authors":"Sergiu Ștefan Luca, Mircea Georgescu","doi":"10.2478/minrv-2023-0030","DOIUrl":"https://doi.org/10.2478/minrv-2023-0030","url":null,"abstract":"Abstract 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.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"11 3","pages":"40 - 66"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139194358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Case Study to Using Acid Soluble Abrasive Materials for Hydra Jetting Gas Well","authors":"Alejandro Osorio Pozo, Alaa Zeinab, Timur Chiș, Claudia María Brezeanu","doi":"10.2478/minrv-2023-0032","DOIUrl":"https://doi.org/10.2478/minrv-2023-0032","url":null,"abstract":"Abstract 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.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"46 5-6","pages":"80 - 86"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139191731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Romanian Mining - Past, Present and a Possible Future","authors":"Dumitru Fodor, Mircea Georgescu","doi":"10.2478/minrv-2023-0031","DOIUrl":"https://doi.org/10.2478/minrv-2023-0031","url":null,"abstract":"Abstract 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.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"1200 ","pages":"67 - 79"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139195304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Origin of Mineral Waste from Constanta Port and the Necessity to Introduce it into the Circular Economy","authors":"Alexandru Florin Mihai, Maria Lazar, C. Bădulescu, Camelia Traistă","doi":"10.2478/minrv-2023-0033","DOIUrl":"https://doi.org/10.2478/minrv-2023-0033","url":null,"abstract":"Abstract 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.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"35 6","pages":"87 - 95"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Brief Study to Assess the Environmental Impact Generated by Jilț North Open Pit","authors":"F. Faur, Mioara Brujan Predoiu, Maria Lazar, I. Apostu, Daniel Moisuc-Hojda","doi":"10.2478/minrv-2023-0029","DOIUrl":"https://doi.org/10.2478/minrv-2023-0029","url":null,"abstract":"Abstract 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.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"19 4","pages":"29 - 39"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rockmass Fracture Analysis at Cărpiniş Travertine Quarry Using Ground Penetrating Radar and Geophysical Methods","authors":"Camelia Madear, L. Asimopolos, N. Asimopolos, Gelu Madear","doi":"10.2478/minrv-2023-0017","DOIUrl":"https://doi.org/10.2478/minrv-2023-0017","url":null,"abstract":"Abstract Travertines are susceptible to fracturing/ cracking, making it difficult to extract large uncracked blocks of significant commercial value. In our study, we used the GPR – Ground Penetrating Radar and other geophysical methods (resistivity and seismic methods) to evaluate the degree of fracturing. Following the interpretation of the longitudinal and transversal GPR profiles, corroborated with the resistivities minima, led us to identify fractures and highly fracturing areas in the Carpinis quarry. In addition, using these combined methodologies and corroborating geophysical, geological, tectonic and geomorphological information creates the premises for an effective investigation of Carpinis quarry, which assists with optimising the mining process.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"86 1","pages":"75 - 81"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78237685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hybrid Energy System Based on the Mix of Fossil and Renewable Energy Resources","authors":"S. Radu, A. Barbulescu, Ciprian Coandreş, Charles Rostand MvongoMvodo, I. Scutelnicu, Jamal Khamis, Alexandru A. Burian","doi":"10.2478/minrv-2023-0011","DOIUrl":"https://doi.org/10.2478/minrv-2023-0011","url":null,"abstract":"Abstract In the article, the authors present the approach of combining energy production systems, subsystems by obtaining specific advantages, facilitating the efficient conversion of resources subject to advanced energy-thermal treatment, and solutions are proposed for the creation of a “photovoltaic - other combining resources” matrix. obtaining the generational energy mix. The paper describes the endogenous economic growth through the knowledge of hybrid technological processes, the technical and technological changes in the field of energy, the relational implications in the field and advances the proposal of a hybrid energy system based on the mix of geothermal energy resources from closed coal mines) and renewable energy resources solar. Also, the breakdown of energy/geothermal heat sources recovered from galleries and long-front abattoirs as lots of a sub-system of energy production in a hybrid energy system based on the mix of geothermal mining and renewable solar energy resources is reported. The authors conclude that the addition of the “hydrogen production” sub-system to the hybrid energy system based on the mix of fossil and renewable energy resources represents extensive conceptual and operational specific development.","PeriodicalId":18788,"journal":{"name":"Mining Revue","volume":"2014 1","pages":"23 - 29"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87936501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}