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Soil stabilization represents process for improvements physical-mechanical and deformation feature of soil, adding binders. There are two basic kinds of stabilization: mechanical and chemical. Chemical stabilization of soil refers on addition binders to basic material of soil. The most common materials in chemical stabilization soil are lime and cement. In this work will to be shown the results stabilization soil with lime, for access roads on territory of the city of Bor. more...

There was an increase in the groundwater level and increased waterlogging of the terrain at the "Šaški potok" flotation tailing dump in Majdanpek, due to a damage of drainage collector. The stability of man-made materials of the landfills is directly dependent on the position of the free water surface in the body of the landfill. The rise of the underground water level leads to a decrease in the strength parameters of the materials from which the dam is built, which reduces the safety factor of the outer slope. For the purpose of interventional lowering the high level of underground water in the main dam body of the landfill, a hydrodynamic terrain model was created and various conceptual solutions were evaluated, using the hydrodynamic analysis. A group of wells was selected as the most optimal technical solution for lowering the groundwater level below the designed elevation. more...

By analyzing the world's best practices, the mining waste dumps can be turned into suitable land for location the renewable and clean energy power plants. There are several advantages that characterize these locations: they are characterized by the environmental conditions that are not acceptable for commercial or residential development. Generally, they are located near the existing roads and energy transmission or distribution infrastructure. They can be adequately zoned for renewable energy sources, provide the opportunity for employment in the urban communities and to promote cleaner and more cost-effective energy technologies, reduce the impact of energy systems on the environment (e.g. reduce the emission of harmful gases). As the solar power plants are usually built on large areas, which can lead to the changes in geological and geotechnical conditions along the project site, it is extremely important to design the appropriate geotechnical investigations to reduce or limit the geological uncertainty and determine the suitability of site for construction. In these cases, the geotechnical studies are very complex, striving for a multidisciplinary approach in analyzing the site in question for construction a solar power plant, respecting the current legislation , regulations, norms and standards. more...

The applicability and purpose of the micro-reinforced concrete is such that they are made according to the special systems and recipes with the addition of additives, fibers or additives and fibers, which should provide the concrete with the most optimal properties for each of the specific cases of use. The micro-reinforced concrete with polypropylene fibers is used for shotcrete, in the remedial mortars, for making floors, in plaster mortars, to improve the fire resistance and so on. A compressive strength is one of the physical and mechanical characteristics, that is partially mentioned in this paper. more...

Atmospheric pollution at the open pits depends on the annual production and intensity of emissions the harmful gases and dust, that is, development the individual phases in overburdening and obtaining the useful mineral resources. The gas and dust emissions at the open pits occurs as a consequence of technological processes aimed at obtaining the mineral resources, most often during loading and transport operations. In addition, the pollution also depends on the terrain configuration around the open pit and climatic parameters. Therefore, it can be considered that the entire area of the open pit is a source of environmental pollution. This paper will present the results of pollution level by gaseous pollutants at the open pit, caused by the operation of mining machines. more...

In order to enable further overhang of the flotation tailing dump and its exploitation in the safe and stable conditions up to the designed elevation of K+545 m altitude, since the stability coefficients in a part of the tailing dump next to PS Kaludjerica are below the minimum due to a wide seepage front through the outer slope of the embankment, its rapid rehabilitation is necessary. In this paper, the problems affecting the rehabilitation and further overhang of the tailing dump are present. more...

After conducting the geotechnical and hydrogeological explorations of the RTH flotation tailing dump and determining the stability of slopes for the overhanging purposes, the zone with the observed instability, an elevated and unfavorable gradient of the groundwater level, was determined and located. Due to these reasons, further design of the groundwater level regulation system was started. The hydrodynamic analysis of the task determined that in order to achieve the effects of lowering and regulating the level of underground water, it is necessary to construct fourteen wells. more...

Geotechnical and hydrogeological investigations were carried out at the location on the sector 6 of the "Valja Fundata" flotation tailing dump in Majdanpek. The goal of investigations was to define the geotechnical and hydrogeological structure of this part of the tailings dump, as a basis for determining the optimal conditions for overhanging and rehabilitation of the terrain, planned for the landfill expansion. The appropriate geotechnical and hydrogeological terrain models, which will be used as a starting point for further construction and mining design, were developed applying the multidisciplinary geological investigation models. more...

During the geotechnical research at the RTH flotation tailing dump in Bor, the environment representing the so - called "anthropogenic layers" of smelting slag was singled out in the engineering geological materials of the field. It is a petrified, semi-metallic material, which forms layers in the field or is spread in a loose state. This paper presents the results of geomechanical and chemical tests, as well as the SEM analysis of samples of this material. more...

The problem of unregulated waste disposal sites is present not only in Serbia but in the other parts of the Republic of Serbia. Therefore, it is necessary to locate these waste dumpsites, investigate their negative impact on the environment, make environmental risk assessment and start solving this problem. This presentation shows a methodology of the environmental risk assessment for the unregulated waste disposal sites in the city area of Bor. The idea, presented through this methodology, suggests how to understand the risk, how to make the risk assessment so that the owner is informed about possible consequences. In this way, a possibility can be avoided that in fear of unknown and incapable of understanding, the owner might take the precautionary measures at random. With regulated categorization a remediation of waste disposal sites can be done. more...

Geotechnical investigations were conducted at the construction site of the new crushing plant at the open pit "Kriveljski kamen" in Bor. The construction of parts of this plant is planned on an unstable slope. The aim was to define the lithological-geotechnical material and terrain structure as a basis for determining the optimal conditions of construction, excavation methods, funding and undertaking the reclamation measures in the area intended for accommodation of facilities. more...

The increase in mining activity in the Bor basin in recent years has also required the construction of new mining facilities. The construction of numerous embankments and dams, as parts of these facilities, required a constant control of compaction the coarse-grained and fine-grained materials from which they were built. The compaction check was performed using the static and dynamic circular plate test. The results of measurement and correlation of static and dynamic deformation modulus for multiple types of materials, used during construction, are presented. more...

During formation of the flotation tailing dump Čukaru Peki, a landslide was activated above the mentioned location, which led to a standstill and endangerment of works. In order to obtain the geotechnical bases for designing the measures for its rehabilitation, the landslide tests were performed. Geomechanical works included the field research and testing, laboratory geomechanical testing and cabinet work more...

Underground structures and tunnels as buildings cover a wide range of the areas in constructions that are closely intertwined and mutually conditioned. The geological environment conditions are a choice of excavation technology, which in turn indirectly affect the pressure level of rock mass and the choice of supporting structure (temporary and permanent). Calculation for the support metal elements capacity is presented in this paper. more...

For the purposes of the Project Cadastre of Mining Waste in the Republic of Serbia.", implemented by the association PLEJADES GmbH - Independent Experts and DMT GmbH & Co. KG, Germany, the Mining and Metallurgy Institute Bor has performed the geotechnical exploration and testing in order of the slope stability assessment of the mining waste facilities. more...

The Point Load Test (PLT) was performed in the geomechanical laboratory of the MMI Bor, in order to determine the strength index of coal samples from the Brod - Gneotino, Bitola, Republic of Macedonia. On the basis of the obtained results, it is possible to predict the other parameters of the rock mass strength. This paper presents the values of the calculated uniaxial compression strength of coal. more...

This paper gives the stability analysis of the Western and Eastern external landfill at the Open Pit Gacko, together with the problems that occurred during the last field visit.

In the period May-June 2017, the Laboratory for Geomechanics of the Mining and Metallurgy Institute Bor, performed the laboratory tests of natural stone from the quarry 'Bresje' near Jagodina, as a technical construction stone. Tests were carried out to the extent prescribed by the domestic regulations in order to obtain an exploitation permit. The results of physical-mechanical, petrographic and chemical characteristics that allow or limit its use as a technical building stone are presented in this paper. more...

The need to open the lower parts of the ore body was caused by a number of reasons. One of the reasons is the high price of precious and non-ferrous metals on the stock market, which is far higher than the one used in calculation the technical-economic assessment in the project study on mineral reserves from 2004. Another reason for opening the lower parts of the ore body would be the remaining part of the balance reserves verified by the project study on ore reserves, not included in the main mining design on mining the ore body 'Čoka Marin - 1'. more...

Ugljevik Basin is an important energy resource of the Republic Srpska and base for operation the power plant Ugljevik. Level of exploration the Ugljevik Basin, Mining District Bogutovo Selo, at the far NE slopes of the mountain Majevica and a part of the South Mining District of the deposit Bogutovo Selo, the area 'Jablan', are completely geologically explored, and geological explorations are continued in the area of coal deposit Ugljevik-East. This work presents the results of petrographic, chemical and physical characteristics of coal samples from the deposit 'Ugljevik East-Phase II.' Testing of coal samples showed the heterogeneous composition (lithotypes, mikrolithotypes, macerai), and varying degrees of carbonization as well as physical-chemical characteristics of coal (technical and silicate analysis). more...