基于正交试验的矿柱稳定性影响因素敏感度分析

摘要

The sensitiveness of ore pillars stability to each influence factors is analyzed from the as-pects of load,structure parameters and rock overburden,the formula of ore pillar safety coefficient is de-duced.Based on the poor calculation method of orthogonal test,the sensitiveness of strip ore pillars to each influence factors:width of ore pillars >depth of mining >compressive strength ore-bearing rock >density of overburden bulk >height of ore pillars.The analysis results show that,width of ore pillars and safety coefficients of ore pillars are negative related with each other,while,width of ore pillars and depth of mining are positive related with other.%从载荷、矿柱结构参数和覆盖岩层等方面分析了矿柱稳定性对各影响因素的敏感程度，推导出了条形矿柱的安全系数公式。采用正交试验极差计算法得到条形矿柱对各影响因素的敏感度依次为：矿柱宽度＞矿体开采深度＞矿房宽度＞矿岩抗压强度＞上覆岩层容重＞矿柱高度。分析结果为：矿柱宽度与矿柱安全系数负相关，矿房宽度和开采深度则相反。