<p>Sizing the production capacity of underground coal mines is an extremely complex task with a number of specifics that must be taken into account when designing the mines. The main factors are the specific natural-geological conditions of the deposit, which determine the application of an adequate excavation system followed by organizational factors, which in combination gives the most favorable production, economic and safety parameters.</p><p>This paper presents the specifics of production capacity design in active underground coal mines in Serbia, based on a comprehensive analysis of the influencing factors. Of special importance is the ranking of the impact of natural and geological conditions on the excavation system, with four groups with the qualitative analysis.</p>

<p>The “product” of architecture, as something that is created by the architect in a “design process”, along with other effective materialistic and environmental factors, depends on the worldview of the architect as the pioneer and director of the process. In fact, the architect‟s definition of human being and his aspects of existence on one hand and his needs and objectives on the other, determine “how” and “in what direction” the design process will proceed. It also reveals how the data intended for designing will be gathered, and “for achieving what goals” and “meeting what needs” they are processed. The present enquiry is an attempt to investigate how the character and characteristics of the architect‟s worldview will affect the steps and characteristics of the design process. Therefore, first, an architectural design process will be established step by step, and then, the effects of the worldview on them will be studied; and consequently the components influenced by the worldview will be analyzed. Based on the nature of this paper, the descriptive-analytical methodology and inductive reasoning were used. Also, the required data were gathered by desk study.</p>

<p>The major task of multi-purpose reservoir „Modrac“ operation is to decide how much water should be released now and how much should be retained for future use given some available and/or forecasted information at the beginning of the current time period. In practice, reservoir operators usually follow rule curves, which stipulate the actions that should be taken conditioned on the current state of the system. Through construction of the dam Modrac in 1964, the reservoir of the same name was formed. Its primary objectives were the provision of technological water for industries in the Tuzla region and mitigation of downstream floods as well as recreation and other purposes. The multi-purpose reservoir Modrac is currently a drinking water source for the municipality Tuzla. In order to better manage of the multi-purpose reservoir „Modrac“, certain analyzes are presented in this paper.</p><p>This paper presents an analysis of annual precipitation, mean annual inflows in the catchment area of the multi-purpose reservoir „Modrac“ for the period 1967 - 2016. In this paper there are presented statistical datas on the maximum amount of precipitation for the dry season period (May to October) for different return periods, for different distribution curves, as well as the maximum amount of precipitation for the wet season (November to April) for different return periods for different curves distribution.</p><p>This paper provides information on the movement of precipitation changes in the catchment area of multi-purpose reservoir “Modrac” for the period from 1967. – 2016.</p>

<p>The paper presents the impact of the construction site of a part of the Banja Luka – Doboj motorway, section 1: Banja Luka – Prnjavor, in the settlement of Miloševac, on the quality of water in the rivers Vrbas and Crkvena. Before the construction of a new bridge, the zero state was determined in the direct vicinity and at locations downstream from the construction site in order to have a realistic picture of impacts of the mentioned construction on the quality of surface waters. Comparison of the data acquired by continual monitoring of a significant number of parameters (total 18) during 12 months and their zero state, i.e. their values before the commencement of construction, gives a realistic overview of impacts of the construction site on the quality of water in nearby surface watercourses. In the case that the execution of civil works proves to have a negative impact on the quality of these rivers, the cause of negative impacts shall be determined and additional measures of prevention, reduction or mitigation of impacts shall be taken.</p>

<p>During construction, especially of tunnels, very often there is a need to change the tender technical documents, i.e. the documents upon which the construction permit is obtained and the tender is announced. The main reason for the change of documentation is, above all, unsuficient geotechnical investigations due to which technical solutions and calculations are inadequate. Very rearly documentation is changed due to errors in the calculation if the techncal review of documentation is correctly done. The paper presents an example of the change of documentation during construction and the reasons for that.</p>

<p>Spices and herbs have been used for centuries by many cultures to enhance the flavor and aroma of foods. Early cultures also recognized the value of using spices and herbs in preserving foods and for their medicinal value. In the present study the essential oil of wild growing Thymus praecox Opiz ssp. polytrichus was isolated by hydrodistillationprocess. Extracts of T. praecox ssp.polytrichuswere prepared by using solvents of varying polarity. Antioxidant potential and ability of essential oil and extractsto neutralize DPPH radicals was investigated. The essential oil showed significantly higher antioxidant activity compared with synthetic antioxidants BHA and BHT. This work provides the basis for the present rapidly increasing interest for the use of natural antioxidants as food antioxidants, functional food ingredients and/or as nutritional supplements.</p>

<p>Regional Landfill Brijesnica is located in the northeastern part of Bosnia and Herzegovina, and the western part of the municipality of Bijeljina, and began work in 2010, with an approximate area of 4.5 ha. The sanitary cells are built with protective insulating materials - special geomembranes and other materials that guarantee the protection of groundwater. The landfill has a system to collect leachate and biogas collection system. An equalization pool was built to accept leachate with a recirculation system with the return of leachate into the cell. Leachate from the equalization basin is in the monitoring period directly discharged into surface flows (Majevički kanal).</p><p>In this study, to determine the state of pollution of surface and groundwater first a hydrogeological analysis of the immediate area of the landfill was done. The analysis of the results of the monitoring of leachate, surface water and groundwater in this dump for a period of four years was done. Monitoring of these waters was made in all four seasons during several hidrological years in order to define a degree of pollution of surface and groundwater. Based on the results of analysis the undeniable impact of leachate from the landfill to the surface was determined but not in groundwater.</p>

<p>The paper present a review of the geotechnical characteristics of the terrain at the location of the bridge No. 1 of motorway Lašva – Donji Vakuf, subsection interchange Lašva – interchange Kaonik.</p><p>Also, given the suggestion of foundation structures for each column, as well as the calculated bearing capacity</p>

<p>In Bosnia and Herzegovina, Tertiary volcanic rocks occur within two geotectonically different areas: (1) in northeastern Bosnia, the wider area of Srebrenica and, (2) to a lesser extent in central Bosnia, the wider areas of Maglaj, Teslić and Nemila (Kolići). The major and trace element variations in the rocks surrounding Maglaj indicate their high-K calc-alkaline character, and are consistent with fractionation of the observed phenocryst assemblages (plagioclase, sanidine, biotite and hornblende). The scatter in some graphs cannot be explained by simple crystal fractionation from a common parent magma. More likely, such variations are affected by variable contribution and assimilation of continental crust within the magmas generated in the mantle. The presence of reverse zoned plagioclase phenocrysts, as well as a resorbed rim enclosing the coexisting quartz phenocrysts, can be interpreted by mixing of magmas with different temperatures and compositions.</p><p>All analyzed rocks show enrichment of the LILEs over the HFSEs and have significant negative Ta-Nb, P and Ti anomalies, and positive U and Pb anomalies, which are characteristic of subduction-related volcanic rocks generated in (post) collisional zones. Chondrite-normalized REE patterns exibit enrichment on the LREEs over the HREEs with (La/Yb)cn ranging from 21.4 to 21.9. All analyzed rocks have small negative Eu anomalies (Eu/Eu* =0.86-0.89) which suggests that plagioclase fractionation played a minor role in the genesis of the dacites. Ratios of some diagnostic elements versus SiO2 diagrams are best explained as a result of assimilation of varying degree in the continental crust during magma ascent and continuing fractional crystallization. High values of LILE/HFSE ratios in K/Ti (6.6 to 11.9), K/Zr (124-169), K/Nb (1598-2692) and Ba/Nb (44-65) and negative anomalies of Ti and Nb in the volcanic rocks surrounding Maglaj can be explained as the result of complex processes in the magmatic system originally derived from a mantle wedge.</p>

<p>Using of explosives in modern mining is very important for the good, efficient and rational organization for obtaining of solid minerals, especially in the exploitation of mineral resources on mines with large capacities. Technological phases of drilling and blasting in the exploitation process are very important in this case, and the analysis in this paper, because specific working environment and technical construction-limestone, where performance and capacities for further technological stages largely depends on the granularity of blasted materials (capacities of bulldozers, capacities of loadersexcavators, capacities of trucks and equipment for stone crushing and grinding). Objective of this paper is to get the best drilling and blasting parameters with different combinations of explosives, to get an optimum combination that will be continusly used.</p>