Luka Crnogorac

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• Doctor of Engineering
• Assistant professor at University of Belgrade

Projektovanje jamskih magacina eksploziva predstavlja složen inženjerski problem. Sama namena jamskih magacina zahteva ispunjenost niza uslova koji se odnose na bezbedno pozicioniranje magacina, ispunjenost uslova ventilacije, pristupa, rukovođenja magacinom, načina skladištenja eksplozivnih sredstava, protivpožarne zaštite, elektro zaštite itd. Ve...

The choice of adequate mining machines is one of the most complex problems in the underground exploitation of mineral raw materials. The weight of such a decision is reflected in the high prices of these machines and the occurrence of even greater costs during their use if their choice was wrongly conceived. There are numerous examples from practic...

Relatively large deformations of the steel arch support in underground coal mines in the Republic of Serbia present one of the main problems for achieving the planned production of coal. Monitoring of the critical sections of the steel arch support in the underground roadways is necessary to gather quality data for the development of a forecasting...

Modern mining cannot be imagined without usage the explosives, especially the mass mining of metal deposits. Mining is an economic branch where explosives found the extensive application for exploitation the hard mineral raw materials. Usage the energy of explosive leads to technical-economic indicators improvement during the mineral raw materials...

Eight underground coal mines in Serbia are gathered into public enterprise for underground coal mining (PE UCM Resavica). Applied mining methods and drifting in these mines have not been changed for last 25 years. Drifting is performed by drilling and blasting. In several mines preparations for introduction of longwall mining is underway. This requ...

Apstrakt: Primena energije eksploziva tj. miniranje, predstavlja osnovni na in eksploatacije vrstih mineralnih sirovina u rudarstvu. Miniranjem se postižu vrlo povoljni tehno-ekonomski pokazatelji, koje nažalost prate i negativni efekti miniranja. U cilju zaštite životne sredine potrebno je za svaku radnu sredinu odrediti jedna inu oscilovanja sten...

By its form, the use of explosives has a destructive character. However, energy of chemical explosives is tamed and perfected in many effects, so that is developed a series of activities which work is unthinkable without the use of explosives. In mining industry, explosives are most commonly used for exploitation in hard rock mass. Thereby, large a...

Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and t...

A proper assessment of the stability leads to proactive decision making for the method of construction, the shape and size of the cross-section of the facility and the adequate support. The stability is directly dependent on the physical, mechanical and technical characteristics of the rock mass. The traditional assessment-based approach and the cl...

This paper presents a review of the advantages of application of JKSimBlast 2DFace software in design phase of underground premises. The aim of this research was to show possibilities of the software and possibility of its application in design of underground premises with suggestions for further work. A model of a drift "TIP 5" was developed and a...

A proper assessment of the stability of underground facilities leads to proactive decision making for the choice of method of construction, the shape and size of the cross-section of the facility and the adequate type and dimensions of the support system. The stability is directly dependent on the characteristics of the rock mass. To ease the proce...

Knowing mechanical properties of rocks incorporated with ultrasonic waves velocities investigations provide a secure basis for mine modelling. Uniaxial compressive strength, dynamic elastic modulus and ultrasonic waves velocities are just some of the rock properties that indicate on presence of discontinuities, stratification and fissures of rocks....

This paper presents the process of making the 3D model of terrain, digital elevation model and orthophoto at the location of the "Crveni Breg" mine. The necessary photos were taken with a 20-megapixel digital camera attached on the DJI Phantom 4 Pro photography UAV. AgiSoft PhotoScan was used to create the 3D model of terrain. A spatial visualizati...

За потребе снабдевања водом мале хидроцентрале „Паклештица“ код Пирота, потребно је израдити хидротехнички деривациони тунел. На основу расположивих подлога за пројектовање и литературних података, у овом раду извршена је, класификација радне средине, одређен облик и димензије попречног пресека. Према условима радне средине извршен је избор тунелск...

During the mining and processing of ore leads to gross violations of the environment, resulting in disrupting existing ecological processes in the region. This distortion is reflected, among other things, in the production of large amounts of waste material, which needs to be properly stored. Biological remediation is considered one of the most eco...

This paper represents the choice of shape and calculation of cross-sectional dimension of investigating adit IP-595 (IP-595) in mine "Rebelj" near Kosjeric, as well as calculation and choice of appropriate type of support for this underground mining facility, which will have multiple purposes. In selecting the proper type of support, in addition to...

This paper offers a review of some historical evidence and facts about the existence of mining activities in the area of the mountain Avala. Mining activities at Avala can be traced back to the pre-Antiquity times and, depending on the era and political circumstances, they affected more or less the destiny of the Belgrade neighbourhood and even of...

This paper provides a brief overview of the methods and materials for injection in underground construction, with a focus on the use of new injection compounds for this purpose. The aim is to draw attention to the possibility of applying new materials for injection that are present in the world, which would facilitate the work, significantly shorte...