黄金科学技术 ›› 2024, Vol. 32 ›› Issue (1): 132-143.doi: 10.11872/j.issn.1005-2518.2024.01.146
凡奥奇1(),王万禄2,李树建2,张斌2,刘映辉2,吴浩1,2()
Aoqi FAN1(),Wanlu WANG2,Shujian LI2,Bin ZHANG2,Yinghui LIU2,Hao WU1,2()
摘要:
为解决岩体质量评价相邻等级之间指标参数模糊不确定性问题,引入可拓学理论,提出基于优化组合赋权的可拓学岩体质量分级模型,对昆阳二矿磷矿山地下开采的岩石进行质量评价。首先,根据矿山地质特征选取岩石单轴饱和抗压强度(Rc)、岩石质量指标(RQD)、节理间距(Jd)、结构面条件(Jf)、地下水状态(W)和地应力影响系数(Z)6个影响指标,将每个指标划分为5个等级;然后通过改进的层次分析法和熵权法分别确定指标的主观和客观权重,引入矩估计法对主客观权重进行优化组合;最后应用修正的RMR法和Q系统法对岩体质量进行评价,将分级结果与基于优化组合赋权的可拓学岩体质量分级结果进行比较。研究表明:5个待评价岩体中,除上矿体N3的模型分级结果与修正RMR法存在差异之外,其余岩体的分级结果与修正RMR法相同,使用Q系统法的评价结果整体偏低。此外,该模型可得出岩体质量等级偏向于相邻等级的程度,分级结果符合昆阳二矿磷矿山生产勘探地质报告岩体质量范围,比修正RMR法和Q系统法更加准确,验证了本文方法的可靠性,为地下矿山开采提供了技术支撑。
中图分类号:
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