Abstract
The objective set in the research is the following: to develop the methodology and application tools for assessment of the open-pit excavators engineering level when selecting and designing them for specific mining-geological and technical service conditions. To achieve the objective, the methods of statistical data analysis, methods of regression models and of mathematical experimentation building, analysis and synthesis, methods of comprehensive assessment of the engineering level indicators, as well as mathematical modeling and appliance of linear algorithm were used. As a result, there was developed the methodology of comprehensive assessment of engineering level and parameters optimization of open-pit shovel excavators, there was also developed a software package, based on the methodology mentioned above, that allows science-based selection of excavators that possess optimum parameters for the specified conditions.
Highlights
Open-pit shovel excavators are the prime extracting equipment used for open-pit works and they perform over 80% of the total work content
On the grounds of the developed range of methodologies there was conducted a comprehensive assessment of engineering level of existing open-pit hydraulic «front shovel» type excavators fleet according to proposed nomenclature of simple indicators, using specific for open-pit excavators functional criterion
To compare the engineering level of domestic production excavators (OMZ) with foreign equipment there were examined sufficiently proven and widely used open-pit excavators manufactured by the leading in this field companies: American «Caterpillar», Japanese «Komatsu», «Hitachi», German «Liebherr» and Swiss «Terex O&K»
Summary
Open-pit shovel excavators are the prime extracting equipment used for open-pit works and they perform over 80% of the total work content In this regard, quality of their performing functions determines to a greater extent the efficient operation of the whole mining enterprise [1, 2]. Mining specialists' selection of excavators is mainly based on the operating history of the previous machines, their price and operation costs, and, what is more, no quality assessment of the machines in specific conditions of the enterprise is performed. Such approach has lots of disadvantages the main one is that it is impossible to «bind» the parameters of the selected machine and the parameters of the environment. When selecting and designing machinery with necessary relevant parameters it is necessary to use systems approach that will help improve the quality of open-pit excavation equipment performance
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