School of Geological and Mining Engineering,Xinjiang University School of Resources andGeosciences,China University of Mining and Technology Xinjiang Uygur Autonomous Region Research Institute of Geology and Mineral Resources

为建立在煤矿勘探阶段井巷围岩质量分类的判别模型,选取岩石的天然单轴抗压强度、饱和单轴抗压强度、软化系数、天然抗剪强度、饱和抗剪强度、含水率和岩石质量指标RQD值等7项因子作为分类指标,以新疆乌鲁木齐市某煤矿的2个煤层顶底板的40组岩样作为学习样本,采用Fisher判别分析方法对该40组岩样进行训练,建立了判别模型,采用回代估计方法对每个岩样进行验证,正确率达到97.5%,利用该判别分类模型对另一煤矿的8组岩样进行分类,其分类结果与实际分类结果完全相符。研究结果表明:Fisher判别分析方法是一种有效的围岩质量分类方法,该判别模型可在实际煤矿井巷围岩质量分类中进行推广应用。

in order to establish discrimination model of the surrounding rock quality classification for the mine shaft and roadway at the mine exploration stage,seven factors of a natural uniaxial compression strength,saturated uniaxial compression strength,softening coeffient,natral shearing strength,saturated shearing strength,mnoisture content and RQD value were selected as the classication indexes.Based on 40 group rocksamples from the roof and floor of two seams in a mine of Urunqi.Xinjiang as the study samples,the Fisher discrimination analysis method was applied to the training of the 40 group rock samples. A discrimination model was established.A back substition estimation method was applied totest and verify each sample and the accuracy rate was 97.5%. The discrimination classification model was applied to classify 8 group rock samples from another mine and the classification results were fully fted with the actual classification results. The study results showed that the Fisherdiscrimination analysis method was an effective classification method of the surrounding rock quality and the discrimination model could be promoted and applied to the surrounding rock quality classification of the actual mine shaft and roadway.

中国地质调查局资助项目(1212011120477)；