Browsing by Author "CZAPLICKI, Jacek M."
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Item A CALCULATION METHOD FOR A SHOVEL-TRUCK SYSTEM WITH AN INCLINED HOIST OF TRUCKLIFT TYPE(The International Journal of Mineral Resources Engineering, 2008-07-21) CZAPLICKI, Jacek M.The proposal to apply an inclined hoist of the Trucklift type in open pit mining hung in mid-air. Although this suggestion is quite interesting, no mine around the world was interested in such an installation. It appears that one of the main reasons for which the proposal missed its aim was the lack of the method of analysis and calculation of shovel-truck systems including such a type of hoist to allow an assessment of what kind of improvement might be expected if the hoist is employed in the system. This paper shows the method of analysis and calculation of shovel-truck systems with a hoist, considering the majority of the important compenents that have an influence on the course of the operation/exploitation process of the machinery system. An example is given to add to the communicativeness of the considerations and conclusions drawn.Item BIN VOLUME SELECTION IN RELATION TO HOIST OUTPUT AND STREAM OF ROCK EXTRACTED-ANALYSIS OF THE SYSTEM(The International Journal of Mineral Resources Engineering, 2008-07-20) CZAPLICKI, Jacek M.This paper conducts an analytical description of the problem of shaft bin volume selection in relation to the hoist output given and to the stream of rock mass delivered to the shaft. Special attention is devoted to the stochastic nature of phenomena occurring during ine operation. The stream of mass transported is identified as the Gaussian and the hoist daily output as the random variable that can be described by a modified beta distribution. The bin volmu is considered as a function of either the average value by which the rock mass exceeds the hoisting capacity of transportation both per day or the average rock mass that is delivered to the shaft during the mean time of hoist repair plus the corresponding standard deviation of thise repair time. The rock mass fluctuation in the bin is also taken into account, and its effect included in the calculation procedure.