Application on Gob-Side Entry Retaining Technology with Coal Gangue Bag Packing in Medium-Thick Coal Seams

The key point of production smoothing in coalmine is regular continuing excavate, the gob-side entry retaining technology with coal gangue bag packing not only solve the continuing excavate problem, but also facilitate the meticulous mining. The selection of the waste filling technique and the determination of basic parameters of filling body are the keys to whether gob-side entry retaining technology success or not. Due to the thicker thickness in medium-thickness coal seam and the higher height of crossheading, it is propose that the gob-side entry retaining technology need to be improved much higher. Therefore, the determination of basic parameters of filling body is particularly important.