锡林浩特萤石矿高端壁无底柱分段崩落法

针对锡林浩特萤石矿实际生产中存在的采矿难度大，安全条件差，生产效率低等问题，提出了多作业面同时掘进、覆岩放矿+废石充填的高端壁无底柱分段崩落法开采方案。给出了适合该类矿体的崩矿参数，通过地表监测及室内试验研究塌陷坑边壁岩移的变化规律，提出协同排岩充填的方法，增强边壁与散体堆的稳定性，并依此在锡市萤石矿试验采场进行了试验。跟班标定结果表明:该采矿方法回收率较高（达到94.18%），崩落矿石块度良好，与分析情况基本吻合，可有效解决此类急倾斜中厚矿体开采难题。

High-end Wall Pillarless Sublevel Caving Method in Fluorite Mine in Xilinhot City

The multiple working faces drill synchronously,overburden strata ore-drawing and waste rock filling of the high end wall non-pillar sublevel caving method is proposed to solve the problems of large difficulty of mining,poor safety conditions and low productive efficiency existed in practical production of the fluorite mine in Xilinhot City. The suitable caving parame-ters is given,the change rule of sidewall strata movement of the collapse pit is analyzed by adopting the surface detection meth-od and test method. The collaborative waste rock filling method is proposed to enhance the stability of sidewall and the loose body,and the some relative tests are done in the experiment stope in the fluorite mine in Xilihot City. According to results of the regular shift recordings,the recovery rate is improved to 94. 18%,and the degree of caving ore lumpiness is good,which is consistent with the previous analysis in this paper. The above study results further show that the recovery indexes obtained by the optimization model established in this paper are good,and the mining problems of the steeply inclined and medium thick ore-body can be solved effectively.