基于中心复合响应面的覆盖层岩块粒径与密度实验分析  

Experimental Analysis of Particle Size and Density of Cover Layer Based on Central Composite Response Surface

作　　者：杨贺 路增祥 张国建 Yang He;Lu Zengxiang;Zhang Guojian(School of Mining Engineering,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学矿业工程学院,辽宁鞍山114051

出　　处：《金属矿山》2020年第6期150-155,共6页Metal Mine

基　　金：国家“十二五”科技支撑计划项目(编号:2013BAB02B08)。

摘　　要：无底柱分段崩落法崩落的矿石与覆盖层岩石直接接触,使矿石损失贫化加大。覆盖层是保证井下正常生产的关键,覆盖层形成不合理会加大矿石的损失贫化。针对覆盖层岩石颗粒的粒度与密度,基于中心复合设计进行了实验,建立了粒度与密度对岩石混入率影响的二阶响应预测模型,对实验结果进行方差分析与显著性检验,检验结果表明预测模型的显著性较高,实验值与预测值的拟合程度良好。通过绘制三维响应面图,分析了粒度与密度的交互作用对混入率的影响,结果表明覆盖层岩石颗粒的粒度与密度对岩石混入率的影响情况呈现出非线性,当岩石颗粒的密度值在(3.05~3.46)×10~3kg/m^3时,增加岩石颗粒粒度有助于减少岩石混入。The caved ores by non-pillar sublevel caving method have directly contact with the overburden rock,which makes the ore loss and dilution.The cover layer is extremely important for ensuring the normal operation of the underground.The unreasonable formation of cover layer will increase the loss of ore.According to the grain size and density of the cover rocks,the experiment is carried out based on the central composite design,and the second-order response prediction model for the influence of grain size and density on the rock mixing rate is established.The experimental results are analyzed by variance analysis and significance test.The test results show that the significance of the prediction model is high,and the ex⁃perimental value fit well with the prediction value.The influence of the interaction both particle size and density on the mix⁃ing rate was analyzed by drawing the three-dimensional response surface.The experimental results showed that the influence of size and density of the cover layer rocks on the rock mixing rate was nonlinear.When the density of rock particles ranged from(3.05~3.46)×103 kg/m3,increasing the size of rock particles would help to reduce rock mixing.

关 键 词：无底柱分段崩落法 覆盖层 粒度 密度 中心复合设计 响应面 岩石混入率 

分 类 号：TD853[矿业工程—金属矿开采]