When using rail transport to develop, because locomotives small climbing ability, from one level to another long pit horizontal line, a large turning radius (curve radius gauge railway transport is not less than 100 ~ 120m), by opencast The plane size is limited, and the wiring method is mostly the return pit line and the straight-forward pit line. The former is once every horizontal foldback, and the latter is folded back every other level or levels according to the plane size of the open pit. When the train runs along the pit line, it needs to be rerouted to the working level by the reentry station. Straight-return pit lines have fewer reentry stations, and the train round-trip operation period is shorter than the reentry pit line. Therefore, under the possible conditions, the straight-forward pit line should be used for development.
Since the railway transportation is mostly for the reentry pit line or the straight-forward pit line, as the mining depth decreases, the train increases the transportation period at the turn-back station due to the parking reversal. According to the transportation cost of unit rock, the economically reasonable mining depth for the single railway transportation of the open pit mine is about 120~150m. When using the traction unit, the slope of the line can be increased to 6% and the mining depth can be up to 300m.
The development of railway transportation is generally adapted to the large open pit mine with large plane size and high production capacity. With the development of large dump truck technology, the proportion of railway transportation development has decreased.Sheet Metal Processing,Cnc Sheet Metal Bending Parts,Precision Sheet Metal Bending Parts,Sheet Metal Processing Equipment
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