Wyniki wyszukiwania - Biblioteka Nauki

1

Optimizationof the topology of the structural component of a magnetic robot

100%

Pac P. , Prostański D.

Mining Machines

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2024

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tom vol. 42, iss. 1

30--48

EN

The article focuses on topology optimization using the Finite Element Method (FEM) in the context of mechanical design and structural engineering. The analysis was based on a robotarm component, which is important for minimising its mass due to the way it moves on steel structures such as mining shaft towers. FEA simulations of the non-optimized workpiece were carried out, followed by iterative mass reduction of the workpiece by editing its geometry. Two approaches were compared: manual weight reduction by the designer and topology optimization using the Shape Generator. The presented results answer the question posed in the introduction whether topology optimization using the Shape Generator can yield better results than manual optimization based on the engineering intuition of an experienced designer. The paper also answers the question of at which stage of design it is betterto use tools such as the shape generator. It is confirmed that topologyoptimization can significantly reduce the weight of the designed component, which is important especially for structures subject to special requirements, such as in the case of equipment used in mining. The authors describe what the effectiveness of the optimization may depend on.

2

Concept of using the heat pipes in the heat exchanger of diesel engine exhaust system intended for use in potentially explosive atmospheres

80%

Lesiak K. , Brzeżański M. , Prostański D.

Combustion Engines

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2019

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tom R. 58, nr 2

127--131

EN

Limiting the temperature of exhaust gases to below 150°C is one of the necessary conditions for diesel engine to be used in a potentially explosive atmosphere. For this purpose heat exchangers are necessary to be used. This article presents the concept of exchanger in which heat pipes are used to transport thermal energy from the exhaust gases to the cooling medium.

3

Seventy-year activity of the KOMAG Institute in support of environmental protection

80%

Lutyński A. , Malec M. , Prostański D.

Mining Machines

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2020

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tom no. 2

69--75

EN

Seventy years of interdisciplinary activities of the KOMAG Institute of Mining Technology in support of widely understood environmental protection are presented in the article. The research and development projects oriented onto subject-matter of environmental protection and realized within the framework of the statute, research, research-and–development, ordered, thematic as well as testing-and-servicing activities are described. The article also contains some information about a dissemination of knowledge on environmental protection during the KOMEKO scientific and technical conferences which have been organized by KOMAG since the year 2000.

PL

W artykule przedstawiono siedemdziesiąt lat interdyscyplinarnych działań Instytutu Techniki Górniczej KOMAG w zakresie szeroko rozumianej ochrony środowiska. Opisano projekty badawczo-rozwojowe, ukierunkowane na tematykę ochrony środowiska, zrealizowane w ramach działalności statutowej, projektów badawczo-rozwojowych, zamawianych, celowych oraz działalności badawczo-usługowej. Artykuł zawiera również informację na temat dzielenia się wiedzą, dotyczącą ochrony środowiska, podczas konferencji naukowo-technicznych z cyklu KOMEKO, organizowanych przez KOMAG od 2000 roku.

4

Achievements of the KOMAG Institute in the field of environmental protection over the years 1950-2020

80%

Lutyński A. , Malec M. , Prostański D.

Mining Machines

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2020

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tom no. 3

2--11

EN

Seventy years of research-and-development activities of the KOMAG Institute of Mining Technology in the field of environmental protection are presented in this article. Special attention is paid to the projects oriented onto reducing noise emissions. Technical solutions in the field of noise control, developed at KOMAG and oriented onto passive acoustic baffles and noise silencers are discussed in the article. Some examples of research projects results and their successful implementation in the industry are described. A review of several projects relating to widely understood environmental protection, including work environment, reflect an interdisciplinary approach of KOMAG researchers to the issues of reducing hazards and increasing safety. There is also some information about innovative technical solutions, which obtained awards and were distinguished by domestic and foreign experts at fairs, exhibitions and competitions in Poland and abroad.

PL

W artykule przedstawiono siedemdziesiąt lat działań badawczo-rozwojowych Instytutu Techniki Górniczej KOMAG na rzecz ochrony środowiska. Szczególną uwagę zwrócono na projekty dotyczące redukcji emisji hałasu. W artykule omówiono rozwiązania techniczne dotyczące zwalczania hałasu, opracowane w Instytucie, które są ukierunkowane na ekrany akustyczne oraz tłumiki hałasu. Podano przykłady wyników projektów badawczych i ich wdrożeń przemysłowych. Przegląd różnych projektów dotyczących szeroko rozumianej ochrony środowiska , łącznie ze środowiskiem pracy, odzwierciedla interdyscyplinarne podejście pracowników badawczych KOMAG-u do zagadnień ograniczenia zagrożeń i zwiększenia bezpieczeństwa. W artykule zawarto informację o innowacyjnych rozwiązaniach technicznych, które uzyskały nagrody i zostały wyróżnione przez ekspertów krajowych i zagranicznych podczas targów, wystaw i konkursów organizowanych w Polsce i za granicą.

5

Experimental Verification of Standard Recommendations for Estimating the Load-carrying Capacity of Undercut Anchors in Rock Material

70%

Jonak J. , Karpiński R. , Siegmund M. , Machrowska A. , Prostański D.

Advances in Science and Technology. Research Journal

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2021

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tom Vol. 15, no 1

230--244

EN

The recommendations put forward in the International Standards for anchorage in concrete concerning the assessment of the load-carrying capacity of anchors (the pull-out force) embedded in natural rock material were verified. Regarding the predicted extent of surface failure we have shown, in earlier studies, substantial discrepancies between the strength test results for anchorages in the rock mass and the established standard recommendations for anchorages in concrete. As regards the industrial practice and the goals of the reported project, simplified calculation procedures that will facilitate the selection of optimal configurations for the layout of anchor holes, while being computationally effective and applicable under the industry-specific conditions are sought.

6

Thermal and mechanical energy storage as a chance for energy transformation in Poland

61%

Dyczko A. , Kamiński P. , Stecuła K. , Prostański D. , Kopacz M. , Kowol D.

Polityka Energetyczna

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2021

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tom T. 24, z. 3

43--60

EN

The objective of the European Green Deal is to change Europe into the world’s first climate- -neutral continent by 2050. Therefore, European countries are developing technological solutions to increase the production of energy from renewable sources of energy. In order to universally implement energy production from renewable energy sources, it is necessary to solve the problem of energy storage. The authors discussed the issue of energy storage and renewable energy sources, reviewing applied thermal and mechanical energy storage solutions. They referred to the energy sector in Poland which is based mainly on mining activities. The method that was used in this paper is a review of thermal and mechanical energy storage solutions. In industrial practice, various solutions on energy storage are developed around the world. The authors reviewed those solutions and described the ones which currently function in practice. Hence, the authors presented the good practices of energy storage technology. Additionally, the authors conducted an analysis of statistical data on the energy sector in Poland. The authors presented data on prime energy production in Poland in 2004–2019. They described how the data has changed over time. Subsequently, they presented and interpreted data on renewable energy sources in Poland. They also showed the situation of Poland compared to other European countries in the context of the share of renewables in the final gross energy consumption.

PL

Celem Europejskiego Zielonego Ładu jest przekształcenie Europy w pierwszy na świecie kontynent neutralny dla klimatu do 2050 roku. Z tego względu kraje europejskie opracowują rozwiązania technologiczne zwiększające produkcję energii z odnawialnych źródeł. W celu powszechnego wdrożenia produkcji energii z odnawialnych źródeł energii konieczne jest rozwiązanie problemu magazynowania energii. Autorzy omówili problematykę magazynowania energii i odnawialnych źródeł energii, dokonując przeglądu stosowanych rozwiązań magazynowania energii cieplnej i mechanicznej. Odnieśli się do sektora energetycznego w Polsce, który opiera się głównie na działalności górniczej. Metodą, która została zastosowana w pracy, jest przegląd rozwiązań magazynowania energii cieplnej i mechanicznej. W praktyce przemysłowej na całym świecie opracowywane są różne rozwiązania w zakresie magazynowania energii. Autorzy dokonali ich przeglądu i opisali te, które obecnie funkcjonują w praktyce. W artykule przedstawione zostały dobre praktyki techniki magazynowania energii. Dodatkowo autorzy przeprowadzili analizę danych statystycznych dotyczących sektora energetycznego w Polsce. Zaprezentowali dane dotyczące produkcji energii pierwotnej w Polsce w latach 2004–2019 oraz opisali, jak zmieniały się one w czasie. Następnie przedstawili i zinterpretowali dane dotyczące odnawialnych źródeł energii w Polsce, a także sytuację Polski na tle innych krajów europejskich w kontekście udziału OZE w końcowym zużyciu energii brutto.

7

A Numerical Study of the Influence of Cone Angle of the Breakout Anchor Head on the Crack Trajectory of the Medium

61%

Karpiński R. , Jonak J. , Wójcik A. , Jonak K. , Prostański D. , Kaczyński R.

Advances in Science and Technology. Research Journal

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2024

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tom Vol. 18, no 5

101--112

EN

Anchors of various designs are crucial, especially in mining and underground construction, where they stabilise the excavation and prevent the movement of rocks. They make it possible to control the direction of cracking during explosions, limit the dispersion of rock material and minimise damage from vibrations. The use of anchors increases the safety and efficiency of work in difficult geological conditions. The authors propose the use of modified anchor construction for the detachment of rock lumps. The paper presents the results of a numerical analysis carried out using the finite element method (FEM) on the effect of the angle of the anchor conical head of a new breakout design on the formation of the detachment crack trajectory influencing the range and, consequently, the volume of detached rock output. The analysis was carried out with a view to explaining the mechanism of separation of lumps of rock by the anchor treated as a mining tool.

8

The diversity and plant species composition of the spontaneous vegetation on coal mine spoil heaps in relation to the area size

51%

Woźniak G. , Bakr J. , Dyczko A. , Jarosz J. , Ryś K. , Radosz Ł. , Kaul S. , Adamik K. , Besenyei L. , Prostański D.

Mining Machines

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2023

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tom vol. 41, iss. 1

68--84

EN

Any newly created area includes human-created habitats such as the mineral material of post-coal mining spoil heaps undergoing natural colonization and ecosystem development during the succession processes of vegetation colonization. The study of the factors that influence the succession dynamics, and the mechanisms behind this, have a long history (including the species-area relationship or Arrhenius equation). Nevertheless, the list of scientific questions is increasing. One of the significant issues in the study of these processes is the relationship between factors influencing the Biodiversity–Ecosystem Functioning (BEF) relationships. The main prerequisite is the relationships between the plant species' assemblage mechanisms including diversity and the variety of assembly rules concerning the environmental abiotic habitat processes and these properties are not straightforward. At the large scale, parameters such as age and area of the colonized sites are considered to be important. These relationships are more complicated in newly established post-mineral excavation habitats where novel ecosystems are developing. Regardless of the degree of disturbances, vegetation re-establishes in such environments, as a result of spontaneous succession, by the colonization and establishment of the best-adapted organisms. In the habitats of post-coal mining spoil heaps with pure oligotrophic mineral conditions, the non-analogous, newly formed composition of flora, fauna, and saprophytes has been stated in many previous field studies. This study aimed to explore the biodiversity versus area size relationships, in particular, it investigated the species composition and diversity found in the development of the spontaneous vegetation formed during primary succession on mineral substrate habitats of postcoal mining spoil heaps of different area sizes. We tested the hypothesis: species diversity of the vegetation patches on coal mine spoil heaps becomes more diverse on larger sites over time. These results indicate that the area size of the spoil heap significantly affects the diversity of the vegetation. Regardless of which of the characteristics of the vegetation type (dominant species) is compared, the vegetation on the heaps differs depending on its area size.