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One of the fundamental problems in coal mining industry is inefficient use of machinery and equipment. It is therefore necessary to take measures to improve the situation. An innovative system to test components of mining machinery control hydraulics presented in the article may support the initiative. This system enables reliable and efficient testing of components of the control hydraulics. This has an essential and practical significance, since hydraulic systems are commonly applied by many industries, in parti...

Conditions of the microclimate prevailing in mine workings are one of the most important factors influencing on the comfort and safety of the working mine crews. This climate depends on parameters of the ventilated air stream and conditions prevailing in these workings. Parameters having the most important influence on the conditions of microclimate are temperature of the air and rock mass, humidity, velocity of air stream and average temperature of radiation of wall surface of the working. Nowadays, due to the la...

Underground mining operations are inextricably linked to negative impact on the environment. This impact, in particular, may result in the formation of mining damages (various types of terrain deformation) and pollution of the environment. It can also results in long-lasting changes in the landscape and environment. Sustainable management of areas degraded by mining exploitation requires an accurate stocktaking. Authors of this article presented the example of usage of GIS technology to develop a model of supporti...

Gas flow through porous media is a physical phenomenon commonly occurring in natural environment and in many industrial applications. This phenomenon is most often connect with filtration process and migration of gases through different porous structures, mainly rock media. In these medium there occur free spaces of different shapes, in which flow of gas is possible. These spaces create pores (for which longitudinal dimension and transverse dimensions are similar) and gaps (for which transverse dimension is consid...

Active mining operations in range of gaining raw material have very negative impact on the natural environment. Long-term observations proved that mining exploitation causes very significant changes in natural environment, in the region in which it is conducted. Particularly, this is applies to underground exploitation of hard coal. Underground exploitation and associated coal production cause that a lot of post-mining wastes are formed. These wastes for several years of exploitation in Poland were deposited in po...

A very important factor, which has a great influence on the financial situation of mining enterprises extracting coal, is an effective use of machines. To determine the level of the use of the machines, it is necessary to reliably evaluate their work. The credibility of such evaluation mainly depends on the quality and the amount of obtained data about the parameters of the machinesпїЅ work. To synchronize, archive and analytically process the data, it is essential to use appropriate informatics tools. The article...

One of the main factors determining economic and social development of particular countries is availability of cheap energy source. In a case of European countries, this availability has also important influence on the integration process. Amount of produced energy in given country tells about the level of its civilizing development. Also so-called energy independence that most countries are aimed and which guarantees political independence is strictly related to this problem. It can be assumed, that energy is one...

One of the commonly present gas hazard in hard coal mines methane hazard. The most endangered region by this hazard, during ventilation of longwall in пїЅU from boundariesпїЅ system is the crossing with ventilation roadway (so called пїЅupper corner of longwallпїЅ). Accumulation of methane in this place results from its release from goaf. Therefore, in order to decrease methane concentration in this region, auxiliary ventilation devices are used. They are aimed to supply to this place such an amount of fresh air, ...

One of the most significant elements of every machine operation is its control system. Proper design, construction and operation of the control system is the key factor for correct and efficient operation of a machine. This particularly applies to mining machinery operating in hazardous environments and exposed to loads which cannot be fully predicted. Such machines must be therefore characterized by high reliability, durability, readiness and safety. In order to fulfil all these requirements, a machine must be eq...

One of the most dangerous greenhouse gases that causes intensification of so-called global warming (also called as greenhouse effect) is carbon dioxide (CO2). Results of studies indicate that this gas impacts on the growth of air temperature at the ground and through this it causes the climate changes on our planet. Main reason of emission of this gas is combustion of fossil fuel (coal and crude oil). The biggest emitters of gas are energetics (heat and power production), transport and industry and construction se...

The production of electricity and heat is inextricably linked to the emission of gases, dust and other substances harmful to the environment. The size of this issue depends on many factors. The most important ones are: the type of fuel used in the production of energy, the type and age of generating installations, the technology used and the type and effectiveness of purification systems. The basic problem of power industry is the need to generate the right amount of energy needed for economic development, while a...