The paper discusses the results of a study carried out to determine the thermal condition of a conveyor power unit using a thermal imaging camera. The tests covered conveyors in the main haulage system carrying coal from a longwall. The measurements were taken with a thermal imaging diagnostic method which measures infrared radiation emitted by an object. This technology provides a means of assessing the imminence and severity of a possible failure or damage. The method is a non-contact measuring technique and offers great advantages in an underground mine. The thermograms were analysed by comparing the temperature distribution. An analysis of the operating time of the conveyors was also carried out and the causes of the thermal condition were determined. The main purpose of the research was to detect changes in thermal state during the operation of a belt conveyor that could indicate failure and permit early maintenance and eliminate the chance of a fire. The article also discusses the construction and principle of operation of a thermal imaging camera. The findings obtained from the research analysis on determining the thermal condition of the conveyor drive unit are a valuable source of information for the mine’s maintenance service.

A powered longwall mining system comprises three basic machines: a shearer, a scraper (longwall) conveyor, and a powered roof support. The powered roof support as a component of a longwall complex has two functions. It protects the working from roof rocks that fall to the area where the machines and people work and transports the machines and devices in the longwall as the mining operation proceeds further into the seam by means of hydraulic actuators that are adequately connected to the powered support. The actuators are controlled by a hydraulic or electro-hydraulic system. The tests and analyses presented in the developed procedure are oriented towards the possibility of introducing automatic control, without the participation of an operator. This is important for the exploitation of seams that are deposited at great depths. The primary objective was to develop a comprehensive methodology for testing and evaluating the possibility of using the system under operating conditions. The conclusions based on the analysis presented are a valuable source of information for the designers in terms of increasing the efficiency of the operation of the system and improving occupational safety. The authors have proposed a procedure for testing and evaluation to introduce an automatic control system into the operating conditions. The procedure combines four areas. Tests and analyses were carried out in order to determine the extent to which the system could be potentially used in the future. The presented solution includes certification and executive documentation.

The impact of tourism on quality of life standards in regions is significant in terms of people, planet, and profit. This paper examines the subnational NUTS 2 level regions, (in line with Eurostat) by applying several interlinked and connected indicators. Adopting the three Ps (people, planet, profit) of the Sustainability Services Marketing Mix, this article discusses the fusion of 54 regions of Central and Eastern Europe (Czech Republic, Slovakia, Hungary, Poland, Estonia, Lithuania, Latvia, Slovenia, Romania, and Bulgaria) into clusters according to the selected accommodation tourism indicators used by the European Statistical Agency (Eurostat) to evaluate tourism. Since many variables of the Prague region significantly exceed the values of the remaining regions, this region has been considered as an individual cluster, excluded from the cluster analysis. The cluster analysis resulted in the definition of six clusters consisting of regions with similar indicators’ statistics characteristics. The presented approach changes the traditional approach to clusters in tourism and provokes thinking about new criteria of clustering and solutions in the field of tourism, especially when considering future cooperation, competitiveness, and sustainable development.

Abstract. Raw materials policy of the Slovak republic is currently in stage of the stagnation due to complex conception and outdated data (not updated from 2003). Nowadays there is an effort of the state to develop a completely new concept of the raw material policy using best available techniques in the given field. Paper is based on the study case of assessment of regional impacts of mining and processing the gold ore to public finance derived from real contitions of the Slovak republic region. Results achieved originates from the models for the assessment of the project of mining as well as from the model of environmental and social impact assessment. The main aim of the contribution is to increase the effectiveness in raw materials using with regard to environmental and social impact of the assessed region which could be implemented to the raw materials policy on the national level.

No abstract

Operating life of a mine lasts from a few years to several decades. Mine closure occurs once the mineral resource is exhausted, or operations are no longer profitable. Mine closure plans are required by most regulatory agencies worldwide before a mining closure permission is granted, and must demonstrate that the site will not pose a threat to the environment and health of the society in future. The article describes a new tool, the brownfields methodology, which can help to promote the revitalization of old mining areas as a part of their technological modernization and subsoil full extraction with environmental damage reduction.

Modern theories that make up the paradigm of sustainable development, and the best practices derived from them, are based on the consistency of individual and public needs, factors of economic growth and ecosystem conservation [...]

Информация о статьеПринята 16 февраля 2020 г. Ключевые слова: горнодобывающая промышленность, инвестиции, анализ чувствительности, принятие экономических решений, проектирование Аннотация. Задача анализа инвестиций конкретного проекта заключается в обеспечении достоверности информации, связанной с проектированием, системой разработки, производственными затратами, рекультивацией, средствами консалтинга (например, характер используемых банковских систем, геостатистических и географических информационных систем и т.д.) и многими другими переменными факторами. Фактически необходимо использовать количественные значения для переменных проекта, основанные на техническом анализе. Только в тех случаях, когда переменные количественно определены, исследование экономической эффективности горнодобывающего предприятия может привести к правильным выводам и качественному инвестиционному решению.Такой же подход применяется не только к решению об инвестициях до начала самого производства, например, при реализации нового проекта, но и к решению об инвестициях в уже реализуемые проекты в случае расширения производства или обновления физически и морально устаревших технологий. Ежедневная работа требует информационного анализа высокого качества управления проектами как в техническом, так и в экономическом аспекте. Таким образом, экономическая оценка горнодобывающего проекта или установление предела экономической эффективности горнодобывающего предприятия требует большого объема информации, которая должна быть обработана в одном месте с помощью одной системы. Поскольку процесс принятия решения в отношении вышеупомянутых последствий требует анализа многих альтернатив, необходимо также учитывать такие факты, как затраты, прибыль, экономия, продолжительность проекта, налоги, увеличение эффекта инфляции, проектный риск и другие. В данной статье рассмотрены следующие этапы: изучение базового проекта, изучение влияния налогов и амортизации, эффект кредитования, инструменты для принятия экономических решений, а также анализ чувствительности -метод, описывающий неопределенность, характерную для каждого проекта, особенно для горнодобывающих проектов.