近距离井筒保安矿柱优化研究

Optimization Study on Safety Pillar of Short-distance Shafts

保安矿柱是采掘区域和井筒之间的重要隔离屏障,是确保井筒安全稳定运行的关键。单个井筒保安矿柱的留设方法较为简单,当数个井筒集中在某一小范围区域时,近距离多井筒保安矿柱的留设则较为复杂,需同时考虑数个井筒的保护问题。结合苍山铁矿的现场实际,针对其主井、主溜井和盲竖井保安矿柱的留设问题,设计了不同保安矿柱半径尺寸的多个方案,采用三维数值模拟对保安矿柱进行优化研究,最终确定保安矿柱的最佳尺寸为40m。

Safety pillar is an important separating barrier between mining area and shafts,and plays an important role in ensuring safe and stable operation of shafts.The method of setting safety pillar is simple for single shaft.When several shafts concentrated in a small range,setting up safety pillar of multiple short-distance shafts would be very complicated,so it needs to be paid more attention to the protection of several shafts.Based on the actual situation of Cangshan Iron Mine,aiming at the problems of setting safety pillars in main shaft,main chute and blind shaft,several schemes with different radius sizes of safety pillars were designed.Three-dimensional numerical simulation was used to optimize the safety pillar,and the optimum size of the safety pillar was determined to be 40 m.