金川二矿区16行垂直矿柱安全高效回采实践

分析16行垂直保安矿柱的受力状态以及对整个采场稳定性的作用,以采场稳定性为基础,研究金川二矿区大面积连续开采暂时留设的16行垂直矿柱资源回采技术,开展矿柱安全采矿设计和回采实践。结果表明,在二矿区大面积连续开采过程中,垂直矿柱在高应力作用下产生整体塑性屈服破坏。当回采水平低于垂直保安矿柱以后,整个矿柱对采场的支撑作用逐步减小直至作用不明显,因此回采矿柱对采场整体稳定将不产生显著影响。实践中有效回采了16行垂直矿柱资源。

Practice of safe and high-efficient mining of 16-Line Vertical Pillar in Jinchuan No.2 Mine

Fully mining and using of non-renewable resources is the important measure of realizing sustainable development of mine enterprise. According to the temporary leaving 16-line vertical pillar in large area continuous mining of the No.2 mining area of Jinchuan Group, The paper develops mining technology and engineering practice research of the 16-line vertical pillar based on stope stability. First, the paper analyzes forced state and effect on stope stability of 16-line vertical pillar. The results show that vertical pillar produces the whole plastic yield destruction under high stress in large area continuous mining of the No.2 mining area. The whole pillar supporting effect of stope decreases gradually and no obvious while mining level lower than vertical pillar, The pillar of stope stability will not have a significant impact. Therefore, safe mining design and mining technology of the 16-line vertical pillar was developed, and safe mining engineering practice of the 16-line vertical pillar was carried out.