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有色金属(矿山部分):2019,71(4):81-87
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循环剪切对节理面形貌及强度劣化规律的微观力学研究
张向阳1,21,2,3, 曹 平11,2,3, 陈 锐31,2,3, 周 罕21,2,3, 雍伟勋21,2,3
(1.(1. 中南大学 资源与安全工程学院,长沙 400083;2. 中国有色金属工业昆明勘察设计研究院有限公司,昆明 650051;3. 长安大学,西安 710064))
Micromechanics research on triaxial-torsional for morphology texture and deterioration law of rock strength
(1.(1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China;2. Kunming Prospecting Design Institute Of China Nonferrous Metals Industry Co., Ltd., Kunming 650051, China;3. Chang’an University, Xi’an 710064, China))
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中文摘要: 本次研究运用岩石剪切流变仪对人工灰岩节理面进行正—反循环剪切试验,剪切前后,运用Talysurf CLI 2000扫描仪测量节理表面形态。根据形貌扫描采集结果,四种形貌参数被提出,即岛屿峰态系数K,岛屿数量,岛屿面积和岛屿总面积,结合应力变化值,发现剪切过程中,并非所有岛屿都参与剪切全过程,JRC曲线随被剪次数增加而减小,应力与岛屿峰态系数K存在线性关系,由此发现了岩石节理的微观形态与宏观强度间的关系。
Abstract:The mechanical properties of rock joints usually govern the deformation and shear strength of rock mass. In order to characterize the evolvement of surface morphology and shear strength of rock joints subjected to cyclic shear, the current study performed multiple back and forth shear tests on man-made rock joints. The surface profiler which named Talysurf CLI 2000, was used to scan the surface of sheared rock that joint in order to get the surface morphology parameters. Four micro parameters related to the surface morphology were proposed, included the peak index of island K, number of island, area of single island and total area of island. The comparison of scanned surfaces sheared and only parts of the islands had been sheared for intact samples, and the JRC curves tend to be smooth with the number of shear. Finally, a relationship between the micro surface morphology and the shear strength was proposed.
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基金项目:国家自然科学基金资助项目(11772358,51174228);云南省科技项目:吴爱祥专家工作站(2013C010)
引用文本:
张向阳1,2,曹 平1,陈 锐3,周 罕2,雍伟勋2.循环剪切对节理面形貌及强度劣化规律的微观力学研究[J].有色金属(矿山部分),2019,71(4):81-87.
ZHANG Xiangyang1,2,CAO Ping1,CHEN Rui3,ZHOU Han2,YONG Weixun2.Micromechanics research on triaxial-torsional for morphology texture and deterioration law of rock strength[J].NONFERROUS METALS(Mining Section),2019,71(4):81-87.

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