Daniela Marasová

Mathematical Modelling of the Process of Conveyor Belt Damage Caused by the Impact Stress

The article presents the results of the mathematical modelling of the strain and deformation conditions in the steel-cord conveyor belt of the ST 2000 and ST 2500 types, applying the Finite Element Method. The output of the model is identification of the maximum magnitude of the activated dynamic force in the conveyor belt on the basis of the analysis of vertical shifts of the loaded point, vertical strains in the area of supporting rollers, and the maximum principal strains.

Applying the Heuristic to the Risk Assessment within the Automotive Industry Supply Chain

Abstract Risk management facilitates risk identification, evaluation, control, and by means of appropriate set of measures, risk reduction or complete elimination. Therefore, the risk management becomes a strategic factor for a company’s success. Properly implemented risk management system does not represent a tool to avoid the risk; it is used to understand the risk and provide the bases for strategic decision-making. Risk management represents a key factor for the supply chain operations. Managing the risks is crucial for achieving the customer satisfaction and thus also a company’s success. The subject-matter of the article is the assessment of the supply chain in the automobile industry, in terms of risks. The topicality of this problem is even higher, as after the economic crisis it is necessary to revaluate the readiness of the supply chain for prospective risk conditions. One advantage of this article is the use of the Saaty method as a tool for the risk management within the supply chain.

Intelligent Wagon: A New Approach to Monitoring the Wagon’s Technical Conditions

Information generating on rail freight wagon components that carry a higher risk of damage during operation would create ideal conditions in real time and improve the safety control of their operations. Appropriate application technology can provide a solution for improving the quality of railway wagon operation. The aim of presented paper is to measure, monitor and signal the vehicle during the operation of the vehicle used RFID technology in theoretical and after testing in real conditions of rail freight wagon.

Selection of the Optimal Alternative of the Deposit Opening Applying the Decision-Making Process

The reason for opening deeper mining horizon is to preserve the volume of extraction, a smooth transition to a new horizon with the intention of mining state of existing stocks. In the proposal of opening will be maintain the current direction of transport (extraction of mineral, haulage of materials, lower) through bank to the existing plant equipment. Alternative proposals for solutions of opening new horizon will be limited to the range of main opening workings (hoisting shaft), including relevant hoisting equipment and objects immediately fasten on it. Other deeper horizon equipment outside the pumping station (filling station, transformer station, depot, level gangway, etc.) will be practically independent on the horizon and will be the same essentially in all cases. The proposal will be considered three alternatives: deepening of a shaft, sinking blind shaft and dip road. The best alternative will be recommended on the basis of the decision-making process.

Identification of Factors Causing Damage to Conveyor Belts during the Transportation of Coal

The paper deals with the identification of the factors that cause damages of conveyor belts at coal quarry. On the base of statistical processing of the data obtained from 4 open-pit mining sectors the most important factors causing time-outs are identified. The cause-effect relation is demonstrated on the example of bipartite graph where the higher valence of each out-vertex signalizes the greater importantce of the considered factor to cause shatter effects. In order to avert the negative effects, break-downs and increase the reliability of conveyor belts a monitoring system for these belts is proposed.

Proposal of the Integrated Geothermal Centre Model and its Allocation

The main aim of this article is to propose a model of an integrated geothermal spa resort and its allocation using multi-criteria decision making. Proposal for allocation of mentioned spa resort is defined on the basis of the evaluation criteria.

Risk Assessment Using the AHP Method in the Automotive Industry

Modern cars consist of approximately thirty thousand parts and components; their assembly in an assembly plant is preceded by the supply via an optimally functioning supply chain. Ramification of this chain depends on a car model and equipment; however, the number of direct and indirect suppliers often reaches approximately one hundred and more. That is why perfect mutual cooperation among these suppliers is required while applying the logistic, managerial, as well as information methods to increase the efficiency and eliminate the production down-time. Over the past years, number of events forced major car manufacturers to reassess the supply chain flexibility in high-risk situations.The main objective of this study is to identify weak, high-risk sides of the supply chain and assess them applying the AHP method which represents an efficient tool of multiple-criteria decision making.