岩爆预测和烈度分级的属性数学模型及其应用
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An Attribute Mathematical Model and Its Application in Predicting and Classifying Rockbursts
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    摘要:

    基于属性数学理论,建立岩爆发生预测和烈度分级的属性识别模型。该模型选择影响岩爆的主要因素,如最大切向应力σθ,单轴抗压强度σc,单轴抗拉强度σt以及弹性能量指数Wet,并以σθ/σc,σc/σt以及Wet作为岩爆评价指标和烈度分级标准,通过构造属性测度函数以计算单指标属性测度,以相似数定义相似权的方法确定评价指标的权重,应用置9+信度准则对岩爆进行属性识别。针对一些岩石地下工程实例对模型进行验证,评判结果与实际情况符合得较好,并且与模糊综合评判

    Abstract:

    Based on attribute mathematical theory, an attribute recognition model to predict and classify rockbursts was established. Firstly, the main factors of rockburst, such as the maximum tangential stress of cavern walls σθ, uniaxial compressive strength σc, uniaxial tensile strength σt, and the elastic energy index of rockWet, were chosen for the analysis; and three factors, includingσθ/σc,σc/σt andWet, were chosen as the criterion indices for rockburst prediction in the proposed model. Secondly, attribute measurement functions were constructed to compute the attribute measurement of a single index. Thirdly, the index weight was determined by similar weights defined by similar figures. Finally, the possibility and classification of rockburst were recognized by the confidence criterion. A series of underground rock projects were assessed with the proposed model and method to verify the proposed model. The study indicates that the synthetic assessment results agree well with the practical records, and are coherent to those of the fuzzy synthetic evaluation model and the matter-elements model. Moreover, the proposed model was used to predict rockbursts of a hydropower station and Qinling Tunnel. The results are coherent to those of the synthetic evaluation method, such as artificial neural network and distance discriminant analysis method, and others. The research indicates that an attribute recognition model can predict and classify rockbursts in engineering projects deep underground and provides a new method in practice.

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文畅平.岩爆预测和烈度分级的属性数学模型及其应用[J].土木与环境工程学报(中英文),2008,30(4):114-120. WEN Changping. An Attribute Mathematical Model and Its Application in Predicting and Classifying Rockbursts[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2008,30(4):114-120.10.11835/j. issn.1674-4764.2008.04.025

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