Coal mine area Luhe group sandstone ground drilling, injecting, water reducing, mining and slurrying system and process

The invention discloses a coal mine area Luhe group sandstone ground drilling, injecting, water reducing, mining and pulping system which comprises a vertical storage bin, a spiral conveying machine, a first-stage stirring tank, a second-stage stirring pool and a grouting pump, the vertical storage bin is connected with the first-stage stirring tank through the spiral conveying machine, the first-stage stirring tank is connected with the second-stage stirring pool through an open channel, and the second-stage stirring pool is connected with the grouting pump. The open channel is provided with a baffle used for stopping slurry from flowing, the grouting pump is connected with the second-stage stirring pool and used for injecting grouting slurry in the second-stage stirring pool into a drill hole, the number of the first-stage stirring tanks is multiple, and the multiple first-stage stirring tanks are each provided with a slurry density control device. The invention further discloses a pulping process using the