无底柱分段崩落法损失贫化细部控制方法研究

发布时间：2018-09-05 19:53

【摘要】：无底柱分段崩落法以其安全、有效、适应性强等优点被国内外金属矿山广泛使用;但矿石损失贫化大的问题多年一直未得到解决。针对这一问题,研究了回采过程中矿石损失贫化的发生过程与细部控制方法,分析了分段之间进路非菱形布置、出矿口眉线破坏、爆破隔墙、大块堵塞出矿口一侧等常见现象对放出体形态的影响,探讨由此引起的对崩落矿岩散体几何形态吻合度的降低程度,发现正是这些常见现象制约了崩落矿石的移动范围与总体放出速度,加大了崩落矿石的残留量与放出矿石的混岩量,导致矿石损失贫化居高不下。据此提出了加密回收进路、改进采场结构、控制炮孔不装药长度保护眉线、及时处理堵口大块和保障整条进路菱形布置的细部控制方法。该方法用于邯郸市北m:河铁矿与灯塔市小汪沟铁矿,取得显著成效。
[Abstract]:Sublevel caving method without bottom pillar has been widely used in metal mines at home and abroad for its advantages of safety, efficiency and adaptability, but the problem of large ore loss and dilution has not been solved for many years. In order to solve this problem, the occurrence process and detail control method of ore loss and dilution in the process of mining are studied, and the non-diamond arrangement of the entry road between sections, the destruction of the eyebrow line at the ore outlet, and the blasting partition wall are analyzed. The influence of some common phenomena, such as block on the shape of the caving body, is discussed, and the degree of decreasing the degree of geometric shape coincidence of the caving rock is discussed. It is found that these common phenomena restrict the moving range and the overall release speed of caving ore, increase the residual quantity of caving ore and the mixed rock quantity of ore, and cause the ore loss and dilution to remain high. Based on this, a detailed control method is put forward to improve the stope structure, to control the length of the hole without charge to protect the eyebrow line, to deal with the block in time and to ensure the rhombus layout of the whole route. The method has been applied to Bei: he Iron Mine in Handan City and Xiaowanggou Iron Mine in Dengta City with remarkable results.
【作者单位】：东北大学资源与土木工程学院;
【基金】：国家自然科学基金重点项目(编号:51534003),国家自然科学基金青年项目(编号:51404065) 中央高校基本科研业务费专项资金项目(编号:N140104008,N150104006)
【分类号】：TD853.362

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