scholarly journals Classification of underground mining works within the Tg. Ocna salt mine from the point of view of gas emissions

2022 ◽  
Vol 354 ◽  
pp. 00028
Author(s):  
Adrian Matei ◽  
Nicolae Ianc
Keyword(s):  
Carbon Dioxide ◽  
Underground Mining ◽  
Point Of View ◽  
Salt Mine ◽  
New Classification ◽  
Mining Operations ◽  
Salt Mines ◽  
Mining Works ◽  
Mining Work

According to the new classification method, salt mines and underground work or areas where methane has not been observed but for which methane has been observed in boreholes found in rock massifs are considered to be fire mines / mine areas or mining work. This new classification allows only the effective areas of exploitation to be maintained in the wire regime, the rest of the salt mine being considered non-wire. The purpose of this paper is to determine the rate of methane (explosive gas) and carbon dioxide (oxidizing gas) in the mining operations of the Tg-Ocna salt mine, given its classification.

Reductionism and holism in the philosophy of medicine

2020 ◽  
pp. 66-74
Author(s):  
E. Zakablukovskiy
Keyword(s):  
Philosophy Of Medicine ◽  
Point Of View ◽  
Social Model ◽  
Macro Level ◽  
New Classification

The article highlights certain aspects of the discussion on the topic of reductionism vs. holism in the philosophy of medicine. Classic radical reductionism is defeated by the concept of emergence. The s.c. bio-medical point of view on a malady, despite its relevance and clear benefit, is not recognized as universal as its adherents may claim, and it yields to an integral psycho-bio-social model. The author introduces a new classification of holism (vitalistic, social and individualistic) and makes appropriate recommendations to clinicians. It is social holism at the macro level that has proven effective in combating the spread of COVID-19.

scholarly journals Geological CO2 quantified by high-temporal resolution stable isotope monitoring in a salt mine

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Alexander H. Frank ◽  
Robert van Geldern ◽  
Anssi Myrttinen ◽  
Martin Zimmer ◽  
Johannes A. C. Barth ◽  
...  
Keyword(s):  
Temporal Resolution ◽  
Underground Mining ◽  
Stable Carbon Isotope ◽  
Underground Mines ◽  
Background Concentration ◽  
High Temporal Resolution ◽  
Salt Mine ◽  
Gas Migration ◽  
Mining Operations ◽  
Anthropogenic Contributions

AbstractThe relevance of CO2 emissions from geological sources to the atmospheric carbon budget is becoming increasingly recognized. Although geogenic gas migration along faults and in volcanic zones is generally well studied, short-term dynamics of diffusive geogenic CO2 emissions are mostly unknown. While geogenic CO2 is considered a challenging threat for underground mining operations, mines provide an extraordinary opportunity to observe geogenic degassing and dynamics close to its source. Stable carbon isotope monitoring of CO2 allows partitioning geogenic from anthropogenic contributions. High temporal-resolution enables the recognition of temporal and interdependent dynamics, easily missed by discrete sampling. Here, data is presented from an active underground salt mine in central Germany, collected on-site utilizing a field-deployed laser isotope spectrometer. Throughout the 34-day measurement period, total CO2 concentrations varied between 805 ppmV (5th percentile) and 1370 ppmV (95th percentile). With a 400-ppm atmospheric background concentration, an isotope mixing model allows the separation of geogenic (16–27%) from highly dynamic anthropogenic combustion-related contributions (21–54%). The geogenic fraction is inversely correlated to established CO2 concentrations that were driven by anthropogenic CO2 emissions within the mine. The described approach is applicable to other environments, including different types of underground mines, natural caves, and soils.

Update of the Ventilation Network Related to Livezeni Mine

Mining Revue ◽  
2021 ◽  
Vol 27 (2) ◽  
pp. 1-5
Author(s):  
Eva Biro ◽  
Sorin Mihai Radu ◽  
Doru Cioclea ◽  
Ion Gherghe
Keyword(s):  
Underground Mining ◽  
Ventilation Network ◽  
International Level ◽  
Mineral Substances ◽  
Air Flows ◽  
Mining Works ◽  
Mining Work ◽  
Over Time ◽  
Ventilation Networks

Abstract The ventilation networks are associated with the set of underground mining works used for the extraction of useful mineral substances. Over time, the ventilation networks involve a change in the structure due to either the expansion or restriction of the mining works structure. For the establishment of air flows at the level of each active mining work, specialized programs are used at international level. These programs allow the modelling and solving of complex ventilation networks. The most advanced specialized programs are those from the VENTSIM range. The paper presents the updating of the ventilation network related to Livezeni mine, with the help of the VENTSIM program.

scholarly journals Influence of structural and textural features of ores and rocks on mine dust explosion hazard during development of pyrite deposits

2020 ◽  
Vol 192 ◽  
pp. 03017
Author(s):  
Marina Rylnikova ◽  
Viktor Fedotenko ◽  
Natalia Mitishova
Keyword(s):  
Sulfur Content ◽  
Underground Mining ◽  
Environmental Safety ◽  
Ore Deposits ◽  
Dust Explosion ◽  
Explosion Hazard ◽  
Mining Operations ◽  
Mine Dust ◽  
Mining Works ◽  
Explosive Properties

In the practice of mining works, sulfide-dust explosions often occur during underground development of pyrite ore deposits: copper-zinc, lead-zinc, copper-nickel, antimony, and others. This makes it necessary to conduct researches aimed at improvement of methods for studying the explosive properties of sulfide dust and development of industrial and environmental safety requirements for mining operations. Currently, there is no generally accepted state-approved regulatory procedure for assessment of sulfide dust explosion hazards during underground mining operations in Russia. Assessment of the type and concentration of mine sulfide dust in the underground mine atmosphere is vitally important for solving this problem. In practice, ores even with a sulfur content of less than 35% can constitute a sulfide dust explosion hazard, although mine dust with a sulfur content of less than 35% does not explode in laboratory conditions. To identify the cause of this phenomenon and develop technical solutions for ensuring safety of underground mining operations, change in the sulfur content of various mine dust fractions obtained from primary disintegration of sulfides was studied.

scholarly journals Origin, distribution, and perspective health benefits of particulate matter in the air of underground salt mine: a case study from Bochnia, Poland

2021 ◽  
Author(s):  
Aleksandra Puławska ◽  
Maciej Manecki ◽  
Michał Flasza ◽  
Katarzyna Styszko
Keyword(s):  
Trace Elements ◽  
Particulate Matter ◽  
Human Health ◽  
Gravimetric Method ◽  
Functional Space ◽  
Point Of View ◽  
Water Soluble ◽  
Salt Mine ◽  
Genetic Classification ◽  
Salt Mines

Abstract The composition and distribution of airborne particles in different locations in a salt mine were determined in terms of their origin, the distance from the air inlet, and the adaptation of post-mining chambers and corridors for tourists and general audience. The composition of aerosols in air was also evaluated from the perspective of human health. Air samples were collected on filters by using portable air pumps, in a historical underground salt mine in Bochnia (Poland), which is currently a touristic and recreation attraction and sanatorium. The particulate matter (PM) concentration was determined using the gravimetric method by weighing quartz filters. The content of carbon, water-soluble constituents, trace elements, and minerals was also determined. A genetic classification of the suspended matter was proposed and comprised three groups: geogenic (fragments of rock salt and associated minerals from the deposit), anthropogenic (carbon-bearing particles from tourist traffic and small amounts of fly ash, soot, and rust), and biogenic particles (occasional pollen). The total PM concentration in air varied between 21 and 79 μg/m3 (with PM4 constituting 4–24 μg/m3). The amount of atmospheric dust components coming from the surface was low and decreased with the distance from the intake shaft, thus indicating the self-cleaning process. NaCl dominated the water-soluble constituents, while Fe, Al, Ag, Mn, and Zn dominated the trace elements, with the concentration of majority of them below 30 ng/m3. These metals are released into air from both natural sources and the wear or/and corrosion of mining and tourists facilities in the underground functional space. No potentially toxic elements or constituents were detected. The presence of salt particles and salty spray in the atmosphere of salt mine, which may have anti-inflammatory and antiallergic properties, is beneficial to human health. This study will allow for a broader look at the potential of halotherapy in underground salt mines from a medical and regulatory point of view.

scholarly journals Procedure for the prevention of musculoskeletal disorders: application in underground mining works

Duazary ◽  
2020 ◽  
Vol 17 (3) ◽  
pp. 54-69
Author(s):  
Yordán Rodríguez-Ruíz ◽  
Elizabeth Pérez-Mergarejo ◽  
Walter Alejandro Barrantes-Pastor
Keyword(s):  
Risk Assessment ◽  
Musculoskeletal Disorders ◽  
Working Conditions ◽  
Underground Mining ◽  
Hazard Identification ◽  
Work Related ◽  
Work Related Musculoskeletal Disorders ◽  
Mining Works ◽  
Mining Work

The incidence and prevalence of work-related musculoskeletal disorders is currently one of the most important challenges facing the mining sector. This paper proposes a procedure to prevent these diseases, based on the active participation of workers. The procedure was structured in four stages: hazard identification, risk assessment, proposal of improvements, and implementation and follow-up. To support the application of the procedure, a set of ergonomic methods and tools appropriate for mining work were proposed. The main results of the application of the procedure in an underground mine in Peru are shown, demonstrating its practical value, as well as its usefulness in the improvement of working conditions and in the creation of a preventive culture. The proposed procedure is expected to serve as a reference in the prevention of musculoskeletal disorders in mining works.

scholarly journals Faces of modernity in romanian literature: a conceptual analysis

2014 ◽  
Vol 16 (1) ◽  
pp. 15-34
Author(s):  
Andrei Terian
Keyword(s):  
Conceptual Analysis ◽  
Point Of View ◽  
Secondary Effects ◽  
New Classification ◽  
Romanian Literature

This study analyses the manner in which Romanian criticism chose to define and outline literary modernity. From this point of view, I have highlighted a series of deficiencies in the aforementioned endeavors, among which the reductive vision on modernism, which is limited either to a strictly formal meaning (as literary technique) or to a substantial one (as ideological attitude), the emergence of a non-differentiated concept of modernism, which tends to embrace any secondary effects or, on the contrary, of a generic anti-modernism, irrespective of the level or the direction in which it opposes modernism. Therefore, the present study sets forth a new classification of Romanian literary modernity, which includes, besides modernism, an anti-modernist direction and an ultra-modernist one also.

Chemical Technological Characterization of Some Secondary Pulverous Materials Recycled in Metallurgy

2008 ◽  
Vol 59 (1) ◽  
pp. 92-96
Author(s):  
Constantin Predescu ◽  
Mirela Gabriela Sohaciu ◽  
Dana Serban ◽  
Maria Nicolae
Keyword(s):  
Chemical Composition ◽  
Point Of View ◽  
Scale Mixture ◽  
New Classification ◽  
Gas Removal ◽  
Scrap Iron ◽  
Impact Characteristics ◽  
Experimental Researches

Putting in practice the recycling projects of the damaging secondary powder products as dust, scale (mixture of oxides � fabrication defect appearing at rolling) or sand resulted in steel industry effluents removal, needs to be characterized from physical, chemical and technological point of view. This paper aims to realise a new classification of the damaging material and new definitions for their characteristics. The proposed groups are: producing characteristics, impact characteristics, removal characteristics and recycling valorisation characteristics. To underline the technological importance of the used characteristics as work instruments has been programmed experimental researches regarding the diminishing of the recycling of the dust and the sand obtained after the electric arc furnace gas removal and scale from rolling. The characteristics of recycling valorisation have been assessed: chemical composition and Zn assimilation ratio in the steel, the efficiency in liquid steel, the degree of replacing the scrap iron and the recycling chemical composition.

scholarly journals The influence of extensive caving zones on the state and behavior of the surface as a result of underground mining works

2020 ◽  
Vol 192 ◽  
pp. 03009
Author(s):  
Evgeny Fedorov ◽  
Khaini-Kamal Kassymkanova ◽  
Gulnar Jangulova ◽  
Natalia Miletenko
Keyword(s):  
Underground Mining ◽  
Ore Deposits ◽  
The State ◽  
Mining Operations ◽  
Applied Development ◽  
Urgent Task ◽  
Mine Workings ◽  
Mining Works ◽  
The Stability ◽  
And Behavior

The article discusses the features of the development of the Donskoy chromite deposit and the improvement of the applied development system with self-caving of ore. For a system with self-destruction of ore, as well as for other similar systems, the weakest point is mining under the collapsed massif, which largely affects the stability of mine workings, their safety for the entire period of stope excavation, the effect of extensive zones of collapse on the state and behavior surface. This problem is one of the most important and urgent, especially with the transition of mining operations to deeper horizons, where the technological features of the mine field are significantly complicated. Therefore, the formation of extensive zones of collapsed rocks in the process of stope excavation leads to the development of negative processes for the formation of extremely high loads on the support of mine workings, and in certain geotechnical situations, the collapse zones affect the state of the day surface, where subsidence is possible up to the formation of craters. All this can lead to disastrous consequences, both in mine conditions and on the surface. The study of the formation of caving zones during the development of ore deposits is an urgent task.

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