Development and implementation of technical and economic model of the potential of operation schedules of coal mines
MetadataShow full item record
The purpose of this research is to determine parameters concerning development of the perspective time program to extract reserves providing complete predictability of the progress of mining operations within the sequent areas of a mine field. The conditions are those under which any mine can provide rather stable mining of the intended coal volumes; labour productivity increases within the prescribed limits as a result of its production and economic activities the mine raises the amount of money required to provide resource potential. Methods. Algorithm, relying upon economic and mathematical model to determine values of basic parameters within the coordinate system of technical and economic potential of a mine, is the basis to form such an algorithm for the determination of a potential of operation schedule of a mine as well as strategic parameters of its implementation. The priority obviousness of the basic parameters, identifying a level of operation schedule, depends upon their closeness to the factors being arguments of lower orders. That is why optimization process involved the development of a system of additional restrictions reflecting interconnections between factors of the first order and lower orders. Findings. Analysis of functional relationships and correlation relationships between variables in the context of corresponding equations has helped determine new analytical dependences which, together with the available functional dependences between production characteristics of a mine, make it possible to develop a model to determine values of basic parameters of operation schedule of a mine. In this context, the obtained model is completed with additional restrictions, certain meanings of each variables and the problem solving is limited by Pareto set for the selected variables. Scientific novelty. As for the mines, which standing is characterized by the optimization indices, priority of effect on strategic parameters of their production activities, should be as follows: first, effect on the parameters which actual values excess their critical value, determined in terms of zero value of economic added value under formation, corresponds to relative deviation of the parameter actual value from its critical value (maximum to minimum); second, effect on the parameters, which values do not excess their critical values but differ from their optimum ones, determined for the reference economic potential, should be performed in accordance with a coefficient of the parameter elasticity as for such integral index as "economic added value" (greater to lesser). Practical relevance. Implementation of the model, intended to determine technical and economic potential of mines with the development of Pareto sets, has made it possible to obtain both minimum and maximum values of longwall advance for a group of anthracite mines in Shakhtarsk and Dolzhansk-Rovenky regions to be analyzed. Selection of a reference level of technical and economic potential of a mine, which is less than zero, makes it possible to make a decision concerning closing of certain mines based upon economic expediency, i.e. added value creation. Owing to the abovementioned, two groups of Ukrainian anthracite mines have been identified which are determined as profitable or unprofitable relying upon objective indices. That also helped specify a status of "depressive territories" where underdevelopment in social and economic sphere takes place.