大直径钻孔突出预测指标敏感性及临界值研究

Study on Sensitivity and Critical Value of Large Diameter Borehole Outburst Prediction

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 site testing of the predicting indicator of the large diameter borehole at the working surface in Pingmei Eight Mine, and the sensitivity of the outburst predicting indicator is analyed by using the principal component analysis, and combining the lab, site inspection and “three rates”a- nalysis method, the critical value of sensitivity indicator on prediction can be ascertained. The site testing verify that the indicator is sensitive and the critical value is relibale, and the large diameter borehole pre- dicting method can keep the digging on the working face safely and fast.