Due to the unique advantages in coal mining, the back fill technology with high water material for rib in used gateway is getting more and more special attraction from the coal mining industry.

• 高水材料巷旁充填沿空留巷技术由于其在采煤生产中的独特优点而愈来愈受到采矿界的高度重视,并逐步得到推广应用。