煤岩破坏过程中的统计损伤模型研究

发布时间：2018-06-04 17:15

本文选题：煤岩 + 统计损伤　；参考：《煤矿安全》2017年11期

【摘要】：针对煤岩特性,令其微元强度服从截尾正态分布,引入变异系数参量,建立了煤岩破坏过程中的统计损伤模型。结果表明:模型在反映煤岩破坏过程演变特征时更合理。参数μ与δ分别反映了煤岩宏观强度和微元强度分布均匀性,宏观强度与参数μ呈正相关关系,与参数δ呈负相关关系。进一步对无因次宏观强度分析,发现其大小只与变异系数有关。
[Abstract]:According to the characteristics of coal and rock, the statistical damage model of coal and rock failure is established by introducing variation coefficient parameter from the normal distribution of micro-element strength. The results show that the model is more reasonable in reflecting the evolution characteristics of coal and rock failure process. The parameters 渭 and 未 reflect the distribution uniformity of macroscopic strength and microelement strength of coal and rock, and the macroscopic strength is positively correlated with parameter 渭, and negatively correlated with parameter 未. Further analysis of dimensionless macroscopic strength shows that the magnitude is only related to the coefficient of variation.
【作者单位】：中国石油大学(北京)煤层气研究中心;
【基金】：山西省煤基重点科技攻关资助项目(MQ2014-04)
【分类号】：TE37

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