基于AHP和熵权TOPSIS模型的岩爆预测方法

Rockburst Prediction Method Based on AHP and Entropy Weight TOPSIS Model

为了准确预测地下金属矿的岩爆情况,建立了AHP和熵权TOPSIS模型。运用AHP和熵权法的基本原理,从岩性条件、应力条件和围岩条件3个方面选取预测指标,最终确定的指标为岩石的单轴抗压强度σc、压拉比σc/σt、弹性变形指数Wet、切应力与单轴抗压强度的比值σθ/σc和完整性系数Kv,分别为各预测指标分配合理的权重。然后,运用TOPSIS的基本原理,结合AHP和熵权法得到的权重来计算各岩爆等级临界值和实际矿山数据的贴近度,通过对比这2个贴近度来预测岩爆是否发生。实例研究表明:所建模型得到的预测结果与工程实际情况相一致,因此认为AHP和熵权TOPSIS模型可用于准确预测地下矿山的岩爆问题。

To accurately predict the rockburst of underground metal mine,a AHP and entropy weight TOPSIS model was established.The predictors of rockburst were selected from lithological,stress and rock conditions,the weight of uniaxial compressive strengthσc,the rate of rock’s compressive tensile strengthσc/σt,the elastic energy index of rock Wet,the stress coefficient of rockσθ/σc and integrality coefficient Kv were calculated as the predictors of rockburst by AHP and entropy weight method.Then the closeness of rockburst levels’critical values and realistic mines’data were calculated by TOPSIS,combined with the weight calculated by AHP and entropy weight method.The occurrence of rockburst was predicted by comparing these two closenesses.Case study shows the predicted result of the established model is consistent well with the practical engineering,so the AHP and entropy weight TOPSIS model can be used to predict rockburst of underground metal mine accurately.