岩石非均质性对其峰值应力后弱化过程的影响  

Influence of rock inhomogeneity on softening process after stress of peak value

作　　者：吕兆兴[1] 马永宁 冯增朝[1] 赵阳升[1] 

机构地区：[1]太原理工大学采矿工艺研究所,山西太原030024 [2]西安长庆科技工程有限责任公司,陕西西安710018

出　　处：《辽宁工程技术大学学报（自然科学版）》2008年第6期840-843,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金重大资助项目(50534030);国家自然科学基金资助项目(50404017);山西省自然科学基金资助项目(20051026)

摘　　要：通过非均质数值模拟试验,研究了非均质参数m与岩石峰后弱化模量Y的相关关系,表明m与Y间服从关系式:y=-Aexp(-m/B)+C(式中的系数是与岩石的物理力学参数有关的量)。说明岩石破坏时损伤变量的值受到非均质参数m取值的影响,且随着m值的增加,损伤变量减小;解释了岩石破坏的渐变过程,并从能量的角度分析了岩石破坏过程中弹性能的集聚和释放,能量的集聚、释放与岩石的非均质性有着密切的联系,随着非均质参数m值的增加,岩石破坏前所集聚的弹性能会显著地增加,发生岩爆的几率也增大。Based on numerical test of inhomogeneity, the relationship between inhomogeneity parameter m and softening modulus Y is studied, m and Y satisfy equation： Y =-A exp（-m/B） ＋ C （ here, A.B and C are interrelated constants with mechanical parameters of rock）. The article explains the value of rock damage variable is influenced by the value of inhomogeneity parameter m, and with the increase of the value of inhomogeneity parameter m, the value of damage variable increases. The developmental process of rock gradual failure transformation is expounded. How elastic energy is gathered and released is analyzed in the process of rock failure from energy aspect, energy gathering and release have close relationship with rock inhomogeneity： with the increase of the value of inhomogeneity parameter m, the elastic energy is gathered remarkbly before rock failure and the probability of the rock burst occurring will increase.

关 键 词：岩石力学 非均质性 岩爆 破坏过程 损伤 弱化模量 

分 类 号：TD313[矿业工程—矿井建设]