This paper introduces the key technologies of 8103 and 8402 fully mechanized coal faces of C5 × 3 and 4 × 3 of Dongzhouyao, Tongfa. By reasonably determining the coal caving technology, the safety exits of the head and tail roadways are unblocked, the haulage speed of the shearer is increased, the cutting depth of the shearer drum is increased, the liquid supply system of the emulsion pump station is reformed, and the roof breaking capacity of the top beam of the middle support is increased. The single cutting output of the working face is increased and the work is realized Good economic and social benefits have been achieved.<br>
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