5 research outputs found
Optimisation of final crushed stone exploitation contours on surface mine “Tambura” : master's thesis
Get PDFU radu je prikazan način optimizacije završnih kontura površinskog kopa tehničko – građevnog kamena na eksploatacijskom polju „Tambura“ te je odabrano optimalno rješenje. Sukladno važećoj zakonskog regulativi, dostupnim podacima te pravilima struke izrađena su tri trodimenzionalna modela završnih kontura. Metodom računalnog modeliranja proračunate su rezerve mineralne sirovine za svaki od modela. Analizirane su prednosti, ovisno o kriterijima, za svaku završnu koturu te je na temelju provedene analize odabrano najpovoljnije rješenje za eksploataciju tehničko – građevnog kamena na eksploatacijskom polju „Tambura“.This paper presents the method of optimization of the final exploitation contours of crushed stone surface mine “Tambura” and offers the optimal solution. Three-dimensional models of final exploitation contours were created in accordance with the existing legislation, available data and professional practice. Mineral resource reserves were calculated for each of the models by using a computer modelling method. The advantages of every final contour were analysed in accordance with their criteria. Based on this analysis, the optimal solution for the final contours of exploitation of technical – building stone in the surface mine “Tambura” was chosen
Multi-criteria analysis for the selection of the optimal mining design solution — a case study on quarry “Tambura”
No full textMining design is usually evaluated with different multiple-criteria decision-making (MCDM) methods when it comes to large open pit or underground ore mines, but it is not used on quarry sites. Since Croatia is mostly mining stone, the implementation of such methods in decision making of the quarry mine design is imperative but left out. In this paper, the PROMETHEE II and AHP decision-making methods are implemented on the quarry site to find out the best final quarry design contour. By implementing the MCDM methods, the best quarry model was chosen based on 22 different criteria parameters out of three final quarry designs. The chosen model is not only financially sound but also has the least environmental impact
The influence of haul road parameters on safety
No full textUsing risk assessment in a work process that can influence people, machinery, and environment enables simple and quick method of establishing potential hazards and giving those a risk rating. The big advantage is that hazards are defined for a specific case, and consequently, risk ratings are defined for each hazard. Adding risk ratings for each hazard makes it possible to assess total model risk rating and determine the average risk rating of each model. Distributional risk assessment is an additional method of analysing each model and it provides a visual overview. Additional risk control measures were applied to the least critical model to assess the hazards, and thus model risks were reduced to the least value. Risk assessment was performed on the example of “Očura II” quarry haul road based on a new risk assessment algorithm
PROTECTION OF FORESTS FROM GYPSY MOTH (LYMANTRIA DISPAR L.)
No full textŠume su biološki najraznovrsniji ekosustav na kopnu i jedan od najsloženijih sustava. U Republici Hrvatskoj one čine 49,3% kopnene površine države. Smiju se koristiti jedino na način i pod uvjetima koji su propisani Zakonom o šumama. Zaštita šuma ima važnu ulogu za očuvanje ravnoteže šumskih ekosustava. Najvažniji i najčešći štetnici u hrastovim šumama su: Gubar (Lymantria dispar L.), mrazovci (Operophtera brumata L., Operophtera fagata Scharf), Zlatokraj (Euproctis chrysorrhoea L.) i Zeleni hrastov savijač (Tortrix viridana L.). Kao mjere zaštite od tih štetnika je potrebno koristiti biotehnička sredstva ili biološke pripravke na bazi bakterije Bacillus thuringiensis, a ljudi se moraju zaštititi odgovarajućim osobnim zaštitnim sredstvima koja podrazumijevaju maske za zaštitu lica, zaštitne rukavice i zaštitne kute ili pregače.Forests are the most biologically diverse ecosystem on land and one of the most complex systems. In the Republic of Croatia, they make up 49.3% of the country's land area. They may be used only in the manner and under the conditions prescribed by the Forest Act. Forest protection has an important role to play in preserving the balance of forest ecosystems. The most important and the most common pests in oak forests are: Gypsy moth (Lymantria dispar L.), Winter moths (Operophtera brumata L., Operophtera fagata Scharf), Brown-tail moth (Euproctis chrysorrhoea L..) and Green oak tortrix (Tortrix viridana L.). Biotechnical agents or biological preparations based on the bacterium Bacillus thuringiensis should be used as protection measures, and people should be protected with appropriate personal protective equipment, including face masks and protective coats
Abstracts of The Second Eurasian RISK-2020 Conference and Symposium
Get PDFThis abstract book contains abstracts of the various research ideas presented at The Second Eurasian RISK-2020 Conference and Symposium.The RISK-2020 Conference and Symposium served as a perfect venue for practitioners, engineers, researchers, scientists, managers and decision-makers from all over the world to exchange ideas and technology about the latest innovation developments dealing with risk minimization
