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针对岩体围岩稳定性评价多指标性和不确定性的特点,使用改进的层次分析法和熵值法确定各影响指标权重,并在此基础上,提出一种新的组合赋权规则,得到相对客观准确的结果。依据岩体围岩稳定性影响指标和分级标准,甄选了6个定性指标和8个定量指标,采用组合赋权–未确知测度理论耦合评价模型,构建了评价指标未确知测度函数、评价指标组合赋权值、置信度判别准则,对研究评价12处围岩断面进行了稳定性评价,获得了每个围岩断面稳定性等级,并与现场评价和模糊理论评价结果对比,评价结果基本符合实际情况。研究表明:岩体围岩稳定性的组合赋权–未确知测度模型是一种科学合理的方法,确保了评测对象信息的完整性和评测结果的客观性、准确性、可靠性,为工程岩体围岩稳定性的评价分级提供了一种新思维,具有工程实践指导意义。
Aiming at the characteristics of multi-index and uncertainty of stability evaluation of surrounding rock of rock mass, this paper uses the improved analytic hierarchy process and entropy method to determine the weight of each influencing index. On this basis, a new combination weighting rule is proposed, Get relatively objective and accurate results. According to the influence index and grading standard of stability of rock surrounding rock, six qualitative indicators and eight quantitative indicators were selected. Coupled evaluation model based on combined weighted - unascertained measure theory was constructed to construct the unascertained measure function of evaluation index, The weighted value of the combination of indicators and the criterion of confidence are used to evaluate the stability of surrounding rock sections in research appraisal and obtain the stability grade of each surrounding rock section. Comparing with the evaluation results of on-site and fuzzy theory, the evaluation results are basically In line with the actual situation. The research shows that the combined weight-unascertained measure model is a scientific and reasonable method to ensure the stability of rock mass surrounding rock and ensure the integrity of evaluation object information and the objectivity, accuracy and reliability of evaluation results. The evaluation and classification of the stability of rock mass surrounding rock provide a new thinking, which has the guiding significance of engineering practice.