根据平煤八矿掘进工作面大直径钻孔预测指标的现场测定情况,应用主成分分析法对突出预测指标的敏感性进行了分析,并在此基础上,运用实验室与现场考察相结合的方法及“三率”分析法,确定了预测敏感指标的临界值。现场验证表明,指标敏感,临界值可靠,大直径钻孔预测方法可以保证掘进工作面安全快速掘进。 According to the on-site measurement of large-diameter borehole prediction index of Pingdingsha 8 coal face, principal component analysis (PCA) was used to analyze the sensitivity of prominent prediction index. On this basis, the combination of laboratory and field investigation Method and “three rate ” analysis method to determine the critical value of the sensitivity index. Field verification shows that the index is sensitive and the critical value is reliable. Large diameter borehole prediction method can ensure safe and rapid excavation of heading face.