In addition, when returning to the mining room, it is difficult to ensure that the boundary of the pillar is straight, and the understanding of the outline of the pillar is unclear. When returning to the mining column, most of the original tunnel is used to arrange the blasthole, and sometimes it can only be used for the hole. Blasting (unlike holes make the distribution of explosives uneven), resulting in poor quality of ore deposits, large ore. Zhoushan Golden Pard Machinery Co., Ltd.  , https://www.goldenpardmachine.comSince the pillars are cut by various roadways and both sides are empty, there are many free faces of the mines, and the direction and sequence of the mines are difficult to control.
November 12, 2021