王波, 胡仕宇, 黄子康,等.岩石强度极限邻域内流变扰动损伤规律研究[J].河南理工大学学报（自然科学版）,2023,42(1):15-25.

WANG B, HU S Y, HUANG Z K, et al.Study on damage law of rheological disturbance in the neighborhood of rock strength limit[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(1):15-25.

岩石强度极限邻域内流变扰动损伤规律研究

王波1, 胡仕宇1, 黄子康1, 王灵1, 杨沛基1, 陆长亮1, 王军2, 黄万朋3

1.华北科技学院 应急技术与管理学院，北京  101601；2.山东建筑大学 土木工程学院，山东 济南  250101；3.山东科技大学 能源与矿业工程学院，山东 青岛  266590

摘要:为了研究岩石强度极限邻域内的损伤演化规律，以红砂岩为研究对象，运用核磁共振试验设备和自主研发的RRTS-Ⅳ型岩石流变扰动效应试验系统，开展岩石强度极限邻域内流变扰动效应损伤试验。结果表明：随着扰动次数增加，处于强度极限邻域内的岩石对扰动响应敏感，且扰动次数越多，岩石应变越大，瞬时弹性模量越小，破坏速度越快；通过识别不同扰动次数作用下岩石流变数据参数，得出岩石流变扰动效应损伤本构模型，该模型试验结果与拟合曲线吻合度较高，说明此模型是合理的；运用核磁共振试验设备对强度极限邻域内的岩石进行损伤探测，通过分析岩石T2谱曲线与峰谱曲线面积可知，T2谱曲线出现偏移，出现第三峰值且峰谱总面积增大。研究结果丰富了岩石流变扰动效应理论体系。

关键词:强度极限邻域;岩石强度;本构关系;流变扰动;核磁共振;孔隙结构

doi:10.16186/j.cnki.1673-9787.2021080063

基金项目:国家自然科学基金资助项目（51774195）；河北省自然科学基金资助项目（E2019508088）

收稿日期:2021/08/17

修回日期:2021/11/16

出版日期:2023/01/25

Study on damage law of rheological disturbance in the neighborhood of rock strength limit

WANG Bo1, HU Shiyu1, HUANG Zikang1, WANG Ling1, YANG Peiji1, LU Changliang1, WANG Jun2, HUANG Wanpeng3

1.School of Emergency Technology and Management，North China Institute of Science and Technology，Beijing  101601，China；2.School of Civil Engineering，Shandong Jianzhu University，Jinan  250101，Shandong，China；3.School of Energy and Mining Engineering，Shandong University of Science and Technology，Qingdao  266590，Shandong，China

Abstract:In order to study the evolution law of rock damage in the neighborhood of strength limit，red sandstone was taken as the study object，and the RRTS-Ⅳ rheological disturbance test system independently developed and nuclear magnetic resonance test equipment were used to carry out the experimental study of rock damage caused by rheological disturbance in the neighborhood of strength limit.The experimental results showed that with the increase of the disturbance times，the rock in the neighborhood of strength limit was sensitive to disturbance response，and the more the disturbance times were，the greater the strain of rock got，the smaller the instantaneous elastic modulus and the faster the failure speed.Through the identification of rock rheological data parameters under different disturbance times，the damage constitutive model of rock rheological disturbance effect was obtained，and the model verification proved that the test results were in good agreement with the fitting curve，which showed that the establishment of this model was reasonable.The damage characteristics of rocks in the neighborhood of strength limit were detected by nuclear magnetic resonance test equipment，and the areas of T2 spectrum curve and peak spectrum curve were analyzed.The T2 spectrum curve shifted，the third peak appeared and the total area of peak spectrum increased.The results could enrich the theoretical system of rock rheological disturbance effect.

Key words:neighborhood of strength limit;rock strength;constitutive relation;rheological disturbance;nuclear magnetic resonance;pore structure

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