According to the technical characteristics of the coal mining unit and flexible scraper conveyor in the fully mechanized top coal caving face, the SSJ-1200 / 2 × 200 telescopic belt conveyor is selected for the design of the transportation along the trough of the mining face. : Conveying capacity 1200 t / h, inclination angle ± 5 °, conveying length 1000m, bandwidth 1200mm, belt speed 2.5m / s, motor power 200 × 2kW, voltage 2300v, tail equipped with automatic moving device