Mine planning under uncertainty

The aim of this study is to develop a methodology that can contribute to the construction of scenarios for mine planning and to evaluation of the impact of geological uncertainties provided by simulated models. The approach suggested here includes the definition of a methodology to control and incorporate the local uncertainties associated with the ore in order to improve mine planning, assess the sensitivity of financial return and while considering the variations and uncertainty related to the geological model and grade estimation

Floating slopes method application on the coal deposit Kongora

Izrada geološkog i ekonomskog modela ležišta u trodimenzionalnom okruženju, uz popratne baze podataka i proračune ekonomskih vrijednosti ležišta predstavlja temelj za primjenu suvremenih metoda u rudarstvu. Suvremene metode, kao što su: Lerchs-Grossmann-ova (LG) metoda, metoda pomičnog stošca i metoda dinamičkog programiranja, poslužile su kao izvrstan predložak za izradu programa optimalizacije kontura površinskih kopova. Računalna tehnika omogućila je iznalaženje optimalne konture kopa preko algoritama ugrađenih u profesionalne i namjenske programe. Brzina i jednostavnost rada te dobivanje pouzdanih izlaznih rezultata omogućili su široku primjenu suvremenih metoda, ugrađenih u puno računalnih programa.Temeljem osnovnih kriterija suvremenih metoda (optimalnost, stabilnost i kompatibilnost kosina) autori su predložili metodu optimalizacije kontura površinskog kopa koja je nazvana metoda pomičnih kosina (MPK).Ovaj rad je objedinio rezultate primjene MPK na ležištu ugljena "Kongora".Developing three-dimensional geological and economical models of deposits in combination with deposits economical values calculations, represents a fundament for application of contemporary methods in the mining engineering. It is proved that contemporary methods, such as Lerchs-Grossman\u27s method, Method of floating cone and Dynamic programming, are excellent models for generating the algorithm for contour optimization of an open pit mine. The exploration of the optimal pit contour can be a relatively simple and fast process if specialized mining software is utilized. The simplicity, quickness and reliable results offer a wide range of contemporary methods applications built in many mining computing programs. Based on available contemporary methods and their elementary criteria (optimality, stability and slope stability), authors suggest an innovative method of open pit contour optimization, named "Floating Slopes Method (FSM) ". This paper presents synthesis of results of FSM application on the coal deposit "Kongora"

Smart, social, flexible and fun: Escaping the flatlands of virtual learning environments

© 2019, Springer Nature Switzerland AG. This paper describes the development of intelligent, social, flexible and game-based pedagogic approaches and their applications in Virtual Learning Environment based Education. Applications of computer science technologies and techniques can enable, facilitate and change educational approaches, allowing scalable approaches that can address both individual student needs whilst managing large – sometimes-massive - cohort sizes. The benefits of these information systems include supporting the wide range of contexts met in education, in terms of individual needs and specific subject and curriculum requirements. Technologies and approaches that are considered range from the representation of knowledge and the use of intelligent systems, the use of social computing, through to the enabling opportunities of ubicomp and the practical application of game mechanics (gamification). This paper concludes with practical illustrations in the context of undergraduate computer science didactics

Simulation of rapid loading systems in iron ore mines

In the mining industry, it is observed that sudden break-down of any equipment may stop the entire system, resulting in drastic production losses and enhancing the cost production. In this paper, the probability of sudden break down of each equipment are individually analyzed from their previous performances where the frequency of occurrences, duration and the time-interval of each breakdown has given an additional stress and the non-availability of that equipment on the entire system is discussed. Computerized best fit matching is found out for preventive maintenance of this equipment by developing different sub-routines and simulation models. Optimum utilization of those equipment shows a particular steady- state production from the mine. Advanced technology is used for the operation of the open-pit mining. Hazard due to open cast mining is less than that of underground mines and the recent trend is to adopt the former one. For the mechanization, different types of machineries are used, such as shovel, dumper, dozer, drill machines, etc. use of more machineries increases the complexity of the operation and as a result it is very difficult to the proper matching of these equipment’s. As these machineries are very costly so unless they are properly matched, reduction in production cost is not possible. Sudden breakdown of one equipment may stop the production from whole mine. So it is needed to analyze the breakdown data by statistical approach to find out the possibility of breakdown of that particular equipment and ask for preventive maintenance. This analysis needed the help of computer for simulating the whole mining system to judge the performance of each equipment. This paper deals with the computerized best fit matching, for preventive maintenance of equipment