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基于块体化程度和物元可拓理论,提出一种适用于顶板稳定性分级的BET法(classification method based on blockiness and extension theory).从三维空间上运用块体化程度指标刻化顶板围岩的完整性,建立以块体化程度、单轴抗压强度、节理条件和地下水条件为指标的评价体系;构建物元可拓模型的经典域、节域和待评物元,分析指标间不相容问题,用可拓层次分析法计算指标权重;综合计算关联度,制定出稳定性分级方法与标准.选取广西铜坑矿四个裂隙岩体试验区,进行BET分级法的工程应用研究.将BET法分级结果分别与RMR法、RSR法、Q法等传统方法及BT法的结果进行了对比.结果表明:与其他各类分级方法相比,BET法所选指标体系更全面,评价方法更客观、科学,评价结果更准确.
Based on the degree of blockization and matter-element extension theory, a new classification method based on blockiness and extension theory is proposed, which is based on the block level indicator The establishment of the evaluation system based on the degree of blockization, uniaxial compressive strength, joint conditions and groundwater conditions as the index; building the classic domain, Compatibility problem, using AHP method to calculate the weight of indicators, and comprehensively calculating the degree of correlation to formulate the method and standard for stability classification.Selecting the four fractured rock mass test zones in Tongkeng, Guangxi, the engineering application of BET grading is studied. The results of BET method were compared with the traditional methods such as RMR method, RSR method and Q method, respectively, and the results of BT method.The results showed that compared with other classification methods, the BET method was more comprehensive and the evaluation method More objective, scientific, evaluation results more accurate.