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为弥补现有地下工程围岩稳定性评价方法的不足,建立了改进的物元可拓模型。通过构造一种新的关联函数,解决了因传统的物元可拓模型的关联函数是一个分段函数而存在的不便于计算的缺陷,以及评价指标间的互不相容性问题,拓宽了物元可拓法的应用范围。将改进的物元可拓模型应用于某地下工程围岩的稳定性评价,结果表明,样本1、2、5属于Ⅱ级(较稳定),样本3、4属于Ⅰ级(稳定)。通过将其评价结果与传统可拓法及模糊数学综合评判结果进行比较分析,证明该评价方法的正确性。研究表明,改进的物元可拓模型的评价结果与实际工程地质情况更为吻合,准确度更高,能够反映各因素对围岩稳定性的影响,其合理性和可行性得到了验证。
In order to make up for the shortage of the evaluation method of surrounding rock stability of existing underground engineering, an improved matter-element extension model is established. By constructing a new correlation function, this paper solves the inconvenience of calculation due to the correlation function of the traditional matter-element extension model being a piecewise function and the problem of incompatibility between evaluation indexes, Matter element extension method of application. The improved matter-element extension model is applied to the stability evaluation of the surrounding rock of an underground project. The results show that samples 1, 2, and 5 belong to grade Ⅱ (more stable) and samples 3 and 4 belong to grade Ⅰ (stable). By comparing the evaluation results with the traditional extension method and fuzzy mathematics comprehensive evaluation results, the correctness of the evaluation method is proved. The research shows that the evaluation results of the modified matter-element extension model are in good agreement with the actual engineering geology, with higher accuracy and can reflect the influence of various factors on the stability of surrounding rock. The rationality and feasibility of the proposed model are validated.