Software solution for the mine subsidence prediction based on the stochastic method integrated with the GIS

Mining induced the ground subsidence and consequently, damages on objects above excavation works is a serious problem all over the world. In this paper, a new approach for subsidence and deformation prediction based on the stochastic Pataric-Stojanovic method is presented. Since the calculation using the equations of this method is very complex, the original computer program package with the title MITSOUKO has been purposely designed. The MITSOUKO program enables calculating at any point of the land surface and representing the results owing to the possibility of their integration and further processing in the Geographical Information System (GIS). The components of the GIS are used to realize the spatial analysis.

Changes in a function of transformation as the challenges of tomorrow

In the world of growing uncertainty, a change is the road without real purpose. Upcoming events can be successfully planned and controlled in a shorter time perspective. With time distance from the current standing point, the level of uncertainty increases while probability of outcomes of events that occurred with an effect of change decrease. Dominant challengers of changes in the enterprises are the technical progress and competition. Reaction of an enterprise is its answer on challenges of changes. At the beginning, we think that we know where the change will take us, and expressed if it will be a fact for us to last as long as possible, because of the fact that at some point end will come to the existing, because a change with some other working change is inevitable. Ability to understand changes is a condition to its implementation. Changes in terms of development require an adaptation and active recurrent action, and who manages to adapt to the developing trends and conditions of environment will last and exist, who does not, will disappear.

Application of the COMFAR III software package in development a feasibility study of investment on an example of technical-construction stone of the open pit Gelja Ljut

This work presents the application of the COMFAR III software package in development a feasibility study of investment. The application of this program enables an efficient analysis of investment justification and numerous variations of both input and graphic and alphanumeric output data. The methodological basis of economic analysis, used in this software package, is based on decades of experience of economists, engineers, managers, ecologists and experts from the other fields, as well as on the experience of numerous investment projects within the United Nations Industrial Development Organization. The applied methodology is the current standard in the field of economic evaluation and analysis of the industrial development projects. The software package was used on a specific example of the open pit of technical stone Gelja Ljut-Gacko, in a function of providing the concession right of this deposit for the needs of the Gacko Mine and Thermal Power Plant.

Potentials of traditional cash metal coins versus digital contactless payment in the time of coronavirus pandemic

This paper addresses the challenges associated to the strength of potential for payment with traditional metal cash and paper money versus a non-cash method of payment in the era of the COVID 19 pandemic in the world and our country. The pandemic served to accelerate the contactless method of payment, because payment without contact is now not only a convenience, but a necessity. Before the pandemic in Europe, cash accounted for close to half of the payments, and in just a few weeks of the COVID 19 pandemic, it fell by 10 percent. Concepts that have so far preferred cash were definitely compromised during the pandemic crisis, and the pandemic is actually the strongest marketing of digital contactless payment methods so far, through the dominant contactless style of money exchange in the world and Europe, as shown in the paper we have today. Some research studies described in the paper in form of the health adventages of mobile wallet payments, as opposed to the proven health-threatening cash and coin-based cash payment model, indicate that the end of the cash era is approaching, being primarily accelerated by the health risk of COVID 19 infection. Particularly interesting is the live study conducted in the area of the northern Kosovo and Metohija, presented in a form of a set of financial services offered by the Postal Savings Bank of the Kosovska Mitrovica branch office, and relation between the contactless and cash payment model, before and after the COVID 19 pandemic. Naturally, all of this is accompanied by significantly limited knowledge related to SARS Cov 2, better known as the current COVID 19 pandemic.

Illustration an advantage assessment of the quality management system implementation into metallurgical organizations

Implementation of the quality management system (QMS) in organizations is directly linked to the performances and business activity relative to a competition. With increasing market competition and changing markets, the quality system becomes a significant component and is increasingly being researched and identified as a major factor in cooperative advantage over competition, stakeholder satisfaction and maintaining the good customer relationships in almost all organizations connected with metallurgy. This paper implements a multi-criteria approach to a decision-making based on the Analytic Hierarchy Process. The aim of this paper is to illustrate the assessment of benefits of the quality system implementation ranking the criteria for a sustainable development by the MCDM models.

Formation analysis of Maglajci-Moštanica ophiolytic zones in the North of Kozara for the use of rocks in construction

Based on the field work and laboratory research, the basic geological characteristics of the ophiolitic melange of northern Kozara are presented, with an emphasis on the Maglajci ophiolitic block. Criteria for separations of formations were established and then applied in the analysis, especially those geologically directly recognizable in the field and outcrops, so one ore formation with two ore subformations was separated in the Maglajci block. In the central zone of block, the basalt outflows and diabase are dominant, while in the south of the block it is an outflow basaltic sequence of the ocean floor with the acidic differences of rhyolites and keratophyres. The second subformation also includes the Moštanica and Vojkova Bloc as a whole. The ore bearing formation is evaluated as a medium to low perspective formation, while parts of the Maglajci block with a massive to brecciated outflow are highly perspective terrain. There are rocks of good physical-mechanical characteristics and they meet the most requesting standards for road building. The results of formation analysis have denied a prior prognosis of ore bearing characteristics of this area, because it was thought that the ophiolitic blocks was built almost exclusively of diabase, and that the fields with those blocks are equally and good perspective for researching the deposits of construction stone.

Prospective image of the industrial future

World and facts that will structurally organize it, in the future will be much different from a position in which they are nowadays. Dynamics of development is a result of rapid events and implementation of change. If technology generates a change, a question of survival of functioning and controlling mechanisms for managing businesses in past is being imposed. Chain reaction will show as necessary. The new information will represent the basic of decision of predictive character. The laws of construction and functioning of cybernetic systems are supported. Evolutionary economy [1] and digital Darwinism will mark, from a historical aspect, the content of work and communication. If the natural systems came to be in a spontaneous order, the social organizations are constructed, which especially stands for enterprise, that is set to be efficient and useful creation and whose shaping and management is based solely on a rational behaviour, which means a goal-oriented business direction. In accordance with the topic, the industrial policies, dying industries, propulsive industries in making, occurring technologies will be evaluated that are characterized by AI as well as tendencies of the evolutionary character and digital Darwinism. The result of work should represent the whole model and partial models of industry of the future. IT and communication process (networking) create a symbiosis and that will be a necessity for functioning the organizational systems

Prediction of surface subsidence and deformations due to the underground coal mining

Throughout its historical development, mining has faced the problem of moral and material responsibility due to various types of endangerment and damage to the environment. As a result of the underground coal exploitation, a movement of the rock massif above the coal seam, and changes on the terrain surface due to the process of massif stabilizing take place. The process occurs in space and time, from the moment of balance disturbance in the massif, i.e., the beginning of excavation, during excavation, and after the final excavation of deposit, when the equilibrium state is reestablished in the massif. The character and intensity of these movements and principles according to which they are performed, depend on numerous natural and mining-technological conditions, and are specific to each individual coal deposit. Deformations on the terrain surface in the sinkhole occur in the horizontal and vertical directions. Their values serve to determine the vulnerability level of individual objects on the terrain surface. On the basis of the Patarić-Stojanović stochastic method for the predictive subsidence and deformations calculation, an original MITSOUKO program package, supported by the spatial analyses in the Geographic Information System (GIS), was designed. A case study in Sladaja village influenced by the underground exploitation in the coal mine "Rembas"-Resavica, one of the biggest Serbian coal mines, has been chosen. The data processed in the GIS provided determining the module, sense, and direction of the displacements, sinking velocity, and possible effects of subsidence on facilities.

Supplier ranking in the Public Company for Underground Coal Exploitation Resavica in an aspect of delivery

The aim of this paper is to show the application of multi-criteria analysis (PROMETHEE method) in the selection of suppliers that operate in the mining systems, specifically in the Public Company for the Underground Exploitation of Coal Resavica (PCUEC Resavica)-Serbia. The company ranking was done in terms of delivery according to five criteria. The criteria cover the most prominent aspects of the delivery management of suppliers. Accordingly, 5 suppliers were taken into consideration. In the ranking process the expert knowledge of specialists from the PCUEC Resavica was used. Firstly, the determination of importance and impact of certain criteria to the process of supplier selection was done, and after that the assessment of suppliers according to each criterion is performed by the company experts. The PROMETHEE method is used for the final ranking of suppliers. The obtained results show that the applied combined method gives the excellent results and it can be used for solving a large scale of complex problems in mining systems.

Analytical determination of the availability of a rotary excavator as a part of coal mining system: Case study: Rotary excavator SchRs 800.15/1.5 of the Drmno open pit

Rotary excavators as the basic machines at the open pits of lignite operate in very difficult working conditions, where they are constantly expected to be highly productive, reliable, available and safe as the production carriers. Determining the availability as well as the duration and number of failures using the analytical methods allows to analyze the key influencing factors on their occurrence and values of these parameters and to determine the essential elements of system maintenance and management in order to optimize them.