中文摘要：

新城金矿Ⅴ#矿体-580 m中段顶柱矿石品位高,但地质条件复杂,回采存在安全隐患。为了确定适合新城金矿顶底柱回采的最优采矿方法,引入突变理论对采矿方法的选择问题进行研究,利用突变数学和模糊数学结合引出的突变级数法建立采矿方法综合优越度评判模型。基于突变级数法的边坡稳定性评判法综合考虑了采矿方法选择的不同影响因素（安全、生产能力、经济技术）,根据归一公式作量化递归运算,得到3种采矿方法的突变级数分别为0.972、0.969、0.956,从而确定了方法 I最优。井下工业性试验结果显示,该采矿方法是合理的,表明将突变级数法应用到采矿方法的优选当中是可行的。

英文摘要：

The ore grade of crown pillar at- 580 m level of Ⅴ#ore body in Xincheng gold mine is high. But there exists hidden danger to recover it due to the complex geological conditions. In order to determine the optimal mining method for crown pillars,a catastrophe theory is adopted to optimize the mining method. The catastrophe progression method with the catastrophe mathematics and fuzzy mathematics is used to establish an integrated superiority evaluation model of mining method. Based on slope stability evaluation method of catastrophe progression,different factors（ safety,capacity,economic and technical index）for mining method selection are comprehensively considered. According to the normalized quantitative recursive formula for computing,the mutation progression of three mining schemes is determined to be 0. 972,0. 969,0. 956 respectively,so scheme I is optimal. The underground industrial test showed that scheme I is reasonable. It is feasible to apply the mutation progression method into the optimization of mining method.