CAJ | 학술논문

为探讨岩石不同破坏模式下声发射特征及其参数与应力、应变、损伤变量之间的关系，通过RMT-150C型测试系统及SAEU2S声发射系统对砂岩、变粒岩、花岗岩和石灰岩4类岩石单轴压缩下声发射特征进行实验研究。研究表明：在峰值应力之前，脆性破坏、脆-延性破坏模式的岩石声发射振铃累计计数均有剧烈增加的现象，延性破坏模式的岩石声发射振铃累计计数则是先激增而后有一段“平静期”，可作为岩石即将进入破坏阶段的前兆信息。以时间为中间变量，建立了脆性破坏、脆-延性破坏及延性破坏模式下岩石声发射振铃累计计数与应变的关系模型；基于威布尔分布岩石损伤本构模型，进一步推导出声发射振铃累计计数与损伤变量、应力的耦合关系。经实测数据与所建模型对比验证，延性破坏、脆性破坏模式本构模型精度较高，可为岩石损伤评估提供依据。
위탐토암석불동파배모식하성발사특정급기삼수여응력、응변、손상변량지간적관계，통과RMT-150C형측시계통급SAEU2S성발사계통대사암、변립암、화강암화석회암4류암석단축압축하성발사특정진행실험연구。연구표명：재봉치응력지전，취성파배、취-연성파배모식적암석성발사진령루계계수균유극렬증가적현상，연성파배모식적암석성발사진령루계계수칙시선격증이후유일단“평정기”，가작위암석즉장진입파배계단적전조신식。이시간위중간변량，건립료취성파배、취-연성파배급연성파배모식하암석성발사진령루계계수여응변적관계모형；기우위포이분포암석손상본구모형，진일보추도출성발사진령루계계수여손상변량、응력적우합관계。경실측수거여소건모형대비험증，연성파배、취성파배모식본구모형정도교고，가위암석손상평고제공의거。
In order to study the relationship between acoustic emission characteristic parameters and strain, stress and damage variable of rock under different failure models, the tests have been made to obtain the characteristics of acoustic emission of sandstone, leptynite, granite and limestone using hy-draulic-pressure servo testing system RMT-150C and acoustic emission instrument SAEU2S under the uniaxial compression. Results have shown that the cumulative acoustic emission ring-down count of rocks with brittle or brittle-ductile failure model increases sharply before the peak stress, while accumu-lative ring-down count of rock with ductile failure model surges before a quiet period, which can be considered as a precursor for entering failure phase. With time being intermediate variable, the relational <br> model between cumulative acoustic emission and strain generated from rock with brittle, brittle-ductile and ductile failure has been set up, and the coupled relation among cumulative acoustic emission, dam-age variable and stress has been deduced based on the Weibull distribution constitutive model. Proved by the test data, the precision of constitutive model with brittle, ductile failure is higher, which can pro-vide accurately the basis for rock damage assessment.