Abstract
In a continuous system of production in open-cast coal mining, in addition to the basic machinery which consists of highly productive machines (bucket-wheel excavators, bucket-chain excavators, spreaders, conveyor-belt transporters, etc.) that provide an uninterrupted exploitation of mineral ores, the usage of auxiliary machinery is also necessary. The auxiliary machinery provides the possibility of using the capacities of basic machinery adequately and timely. Further, it must be mentioned that the auxiliary machinery generates up to 20% of the total mining expenses. Dozers are the most commonly used machines. Choosing the adequate dozer of the right type and manufacturer is of great importance and can be made easier by carrying out an analysis of the existent operational-exploitative parameters. In this paper, the method of grading the operational-exploitative parameters of dozer is defined. The choice of the optimal type of dozer was conducted by using the analytical hierarchy process (AHP).
Highlights
The process of ore exploitation in open-cast coal mining is complex and demands hiring many people and providing varied equipment
Taking into account the engine power (EP), the analysed dozers belonged to the group of strong dozers in the range of the 190–300 kW class, and according to the nominal towing force (TF) to the group of heavy dozers 250–350 kN
In order to evaluate the priority, the range of the class for both sub-criteria was divided into 10 equal parts, and each alternative defined its priority in relation to that division
Summary
The process of ore exploitation in open-cast coal mining is complex and demands hiring many people and providing varied equipment. In order to provide continuous (twenty-four hours a day) production and to excavate the planned amount of ore and overburden in an open-cast coal mine, it is necessary to achieve optimal working conditions. In open-cast coal mines, dozers often work under aggravated conditions with the materials of different physical–mechanical qualities and under variable weather conditions. Under such circumstances the workload on the equipment significantly oscillates, making room for frequent changes of the direction, course and the speed of movement
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