Advanced Materials Research Vol. 1020

Abstract: Seismic response of shallowly buried underground under vertical seismic excitation is studied. In order to simplify the analysis two steps are adopted in the analysis. In the first step structure is looked at as rigid body, and the dynamic response of the structure under vertical seismic excitation is obtained on the basis of soil-structure dynamic interaction analysis. In the second step at first the natural frequencies and mode shapes of the structure are obtained with consideration of the bending restraint of the side walls to roof slab, and then the dynamic response is determined by taking the dynamic response of rigid body in the first step as input, and furthermore the bending moment of roof slab is obtained. Key words: vertical seismic excitation, roof slab, soil-structure interaction, dynamic response

Abstract: Abstract. Geo-technological extraction methods recently are widely used in the mining industry. Removing the metals from underground ore deposits is carried out by injecting chemicals (solvents, oxidants, reducing agents) into wells drilled in them, and the subsequent extraction of metals from saturated solutions. Particularly, this method utilized for the extraction of uranium from flooded sediments and copper from poor (substandard) ores, as well as some non-ferrous and rare metals from waste dumps and tailings of substandard ore mines and processing enterprises. The paper discusses methods developed for prediction of moisture content (water saturation) in rocks under filtration of liquid with incomplete saturation of pores while changing the concentration of the metal in the liquid phase (in an ore body), as well as problems of dissolution and desorption of metal salts on the surface cracks or pores on ore body based on molecular diffusion equation of metal salts. The present work conducted for developing the methods for calculating the liquid filtration through underground deposits of minerals and forecasting of dissolving and washing out metals. It is shown that the processes which take place with the use of chemical reagents are different comparing to the similar processes with water injection. These data allow to predict the changes in the concentration of salts and metals in the liquid and solid phases depending on time.

Abstract: The aim of the study is to identify the areas over the mountain slopes along the international Baku-Tbilisi-Ceyhan oil pipeline corridor highly sensitive to erosion, and to evaluate and predict them by considering the topographic, geological, hydrological, hydraulic and climatic factors of the mountain slope, which are the main determinant of water erosion. Aiming at alleviating the erosive processes in the oil pipeline corridor, the new structures of the resource-saving engineering measures of the environmental protective structures are proposed, with the priorities of their scientific-technical novelty evidenced by the relevant patents of Georgia and Russia. The methods to design bunds with the polyethylene bags filled with ground and secondary vehicle tires as anti-erosive measures are proposed.

Abstract: Abstract: National Geodesic Network of WGS-84 system was founded in the territory of the Republic of Armenia from 2002 to 2007, which includes zero, first, and second class 1115 stations and there were other 229 State Geodesic Triangular Network stations. The observation at these stations has been done by GPS system. Each of the above mentioned stations covers on the average 27 square kilometers of the territory of Armenia. The data obtained during GPS observations have become the foundation for creating local quasi-geoid models and obtaining differences of heights (geoid wave value) of normal and WGS-84 ellipsoid surfaces. On the basis of gravimetric data a quasi-geoid model has been computed and developed. To creat the model coordinates of four geodetic satations encompassing the area of the Republic of Armenia have been used. To get the digital model of the selected area was diveded into five-minute sections by latitude and longitude and then coordinates of geodetic points have been taken. The above mentioned points were recalculated from the local system to WGS-84 system. The creation of the local elippsoid quasi-model is conditioned by the difference of 3D coordinates difference of three-dimensional of each point’s position. The values of the geoid wave vary within the range of 17.4547 meters, the average difference being almost in the centre of the area and is 21.2522 meters. To obtain the digital model of the quasi-geoid at the given local ellipsoid at each 100m a square matrix (of the network) was made by coordinates of recomputed points.

Abstract: Since 2013 it is compulsory in the Czech Republic to declare energy performance of a property intended for sale or lease in so called Energy Performance Certificates. Before introduction of this obligation many various arguments were presented to public to support it, especially by the subjects participating in the energetic evaluation of buildings. One of the most common arguments was that this gives people interested in lease or purchase of a property with high energy consumption a tool for reduction of the rental fee or the purchase price. This contribution, based on performed research and wider analyses, shows that this assumption together with others was misleading, and it also evaluates the reasons of this fact.

Abstract: This paper focuses on the present and prospective use of renewable energy in sustainable building. Construction industry, which consumes over 40% of world energy production and generates nearly 35% of world greenhouse gas emissions, bears responsibility for preservation of environment. The principal part of this publication discusses renewable energy as an inexhaustible and ecological source, which conforms to the general principle of sustainable growth.

Abstract: Burning tips of colliery spoil represent long-term ecological hazard. History of these processes in the Ostrava region is more than 20 years long. The attention in the past was in case of burning tips given to control, even to remediate underground fires. Thermal potential of burning tips has remained unnoticed. Just in last five years in Czech republic and abroad it has started to experiment with heat exploitation originating during tips burning. Trial tests with heat exploitation in the Hedvika tip in Ostrava were successful and they produced even economic contribution. Verification of marginal conditions has been already a topic of ongoing research. Hazards during heat exploitation from thermal active coal tips are as follows: migration of thermal spots, difficult temperature regulation of the surroundings from which heat is taken, aggressiveness, and from it resulted demands to materials used in this technology.

Abstract: The largest been realized installations of heat pumps in the Czech Republic, where the primary collector of low-potential heat is formed deep wells, is heating complex building of new Auditorium and CIT in campus of VSB Technical University of Ostrava. This building represents two independent functional units (Auditorium with side halls and Information Technology Centre - CIT) with a total floor area of 9234 m². The original project planned compound heating using district heating as a primary source of heat. Heating the object itself is a combination of floor heating systems and hot-air heaters. During project preparation has changed the project heating and a modern, technically unique and highly cost-effective solution has been designed with heat pump (type rock-water). Currently building heats 10 heat pumps with a total output of 700 kW through 110 wells with a depth of 130 m each. To assess the proportions of individual internal and external sources to the overall heat balance, the verification of systems designed for long-term monitoring of the behaviour of the rock massive around the energy used wells and energy storage options have been proposed and gradually implemented two research measuring polygons. They are located in the area of energy utilized wells. Each of the monitoring wells is instrumented with sensors at a certain depth. This article discusses the implementation of research polygons on experience with the excavation of wells using temperature sensors, a data acquisition system and finally outlines the possibilities of evaluating the measurement data.

Abstract: The analysis focuses on the influence of boundary conditions on the final energy intensity of selected groups of houses. The individual energy intensity will be set for the selected buildings. For these buildings, the standard boundary conditions will change (indoor air temperature). The deviation values of resulting energy consumption will be defined by statistical evaluation.

Abstract: The subject of the paper is to calculate the energy performance of building in proposed variants. The differences in the variants are in the using of conventional and renewable sources for heating and domestic hot water system. Target of the second part of paper is to know, how much money we need to invest into the proposed variants for heating and domestic hot water systems and how much money will by the user paying for operating costs. The conclusion of the paper describes the payback periods of proposed variants.