基于CRITIC-Vague模型的岩体可爆性评价

Assessment for Rock Mass Blastability Based on CRITIC-Vague Model

为更精确地评价岩体可爆性,结合CRITIC法与Vague集理论,建立了岩体可爆性评价的CRITICVague模型。选取抗压强度、岩石容重、完整性系数和炸药单耗作为岩体可爆性评价指标,运用CRITIC法计算了各指标权重,分别将样本数据和评价标准的各项指标值转化为Vague值,将评价标准中的大等级精细化为小等级,采用MATLAB编程并计算样本数据与小等级Vague值的总体相似度量值,依据最大相似度量值确定岩体可爆性的小等级与大等级。将20组岩体可爆性评价工程实例数据代入CRITIC-Vague模型进行验证,评价结果较准确。应用模型于纳米比亚湖山铀矿工程实践,结果表明:该模型具有较高的可靠性,提高了岩体可爆性评价的精度,对爆破工程实践具有一定的指导意义。

In order to evaluate the blastability of rock mass more accurately,and combining the theory of vague set and critical method,a CRITIC-vague model for rock blastability evaluation is proposed. Compressive strength,rock density,rock mass integrity and explosive unit consumption are selected as the rock blastability evaluation indexes,and the weight of each index is calculated by CRITIC method. The index value of sample data and evaluation standard is transformed into Vague value respectively,and the big level in evaluation standard is refined into micro level. MATLAB is used to program and calculate the overall similarity measurement value of sample data and micro level Vague value. The micro level and big level of rock blastability are determined according to the maximum similarity value. 20 groups of engineering cases in rock mass blastability evaluation are introduced into critical vague model for verification,and the evaluation result is accurate.The model is applied to the engineering practice of Husab uranium mine in Namibia. The results show that the model has high reliability,and improved the accuracy of rock mass blastability evaluation. It has a certain guiding significance for blasting engineering in practice.