Study on the capacity and relocation step distance of the semi-fixed crushing station for stripping in Baorixile Open-Pit Coal Mine

To determine the production capacity of the crushing station and its relocation step distance when applying the semi-continuous stripping process in the Baorixile Open-Pit Coal Mine, this study analyzes the production capacity of the semi-fixed crushing station for stripping based on existing production data, such as the raw coal crushing station at the mine. The study investigates the capacity limitations of the stripping crushing station under single access ramp and spreader operation conditions. A residual economic benefit expectation method is proposed and applied to calculate the relocation step distance of the crushing station under spreader-tracking dumping conditions. The results indicate that the optimal time node for deploying the semi-continuous stripping process is after the completion of the mining direction transition, with the layout positioned on the northern end-slope surface of the third mining area. The production capacity of the stripping crushing station in the semi-continuous stripping process is 9 000 t/h, with a designed annual capacity of 14.5 Mm³/a. The service period of the stripping crushing station at the current location is determined to be two years, and the distance from the current position to the access ramp is identified as the reasonable relocation step distance.