THE ARCTIC AREA VERSUS THE WORLD IN THE FIELD OF FOSSIL FUELS

The Arctic area could represent one of the largest world powers oriented on the export of oil, natural gas and other minerals. It would provide a significant position on the international energy market at a time when the energy security is becoming the most frequent topic in international negotiations. Countries surrounding the Arctic area are becoming aware of these factors and take an action to get part of the area. Their aim is to acquire the largest area while their attention is focused on seabed of the Arctic Ocean. Presented article deals with the analysis of the Arctic region from the perspective of international law and fossil fuel reserves which are according to recent surveys located in this area. It also provides an overview of climate change taking place in this area

Theory of Similarity and Modelling in Rock Mechanics

The work describes a laboratory method of investigating the stress-strain state around horizontal mine openings (galleries) using of physical modelling. Basic results carried out of the experiments make possible to determine the value of the supports resistance q, which is required for the stabilization of the mine opening in the real conditions

Stabilitätsanalyse des sekundären Spannungszustandes in der Umgebung

Článok sa zaoberá problematikou stability dlhých banských diel, ktorá je významná aj v špecifických prípadoch líniových podzemných stavieb razených v málopevných horninách. Výskum zmien napäťovo-deformaèného stavu týchto diel bol realizovaný pomocou experimentov na modeloch z ekvivalentných materiálov. Uvedené výsledky pokusov umožňujú stanoviť hodnotu reakcie výstuže q potrebnú pre stabilizáciu podzemného diela razeného v pružno-plastickom horninovom prostred

THE ARCTIC AREA VERSUS THE WORLD IN THE FIELD OF FOSSIL FUELS

The Arctic area could represent one of the largest world powers oriented on the export of oil, natural gas and other minerals. It would provide a significant position on the international energy market at a time when the energy security is becoming the most frequent topic in international negotiations. Countries surrounding the Arctic area are becoming aware of these factors and take an action to get part of the area. Their aim is to acquire the largest area while their attention is focused on seabed of the Arctic Ocean. Presented article deals with the analysis of the Arctic region from the perspective of international law and fossil fuel reserves which are according to recent surveys located in this area. It also provides an overview of climate change taking place in this area

Modelling of heat flow in Earths Crust

The paper deals with the modelling of the heat flow in the Earths crust. The used three-dimensional model utilises the computer environment where the rock masses are modelled by the set of basic structural elements placed in the orthogonal co-ordinate system x, y, z, while the basic structural element is a cube with a chosen size. The physical notion of the diffusion is utilised for modelling the potentials flow from places with higher value of potentials to the surrounding rock masses. With the help of coefficients of diffusion kx, ky, kz, representing the ability of transmission of the thermal energy being present in the basic structural element of the rock to the adjacent structural elements of the rock model, it is possible to model iso-tropic, anisotropic, or heterogeneous properties of the modelled rock masses, as well as the properties of spreading the heat in this environ-ment