[1]邵珠山,郭 轩,袁 媛,等.微波辐射下花岗岩的断裂韧性劣化规律研究[J].西安建筑科技大学学报(自然科学版),2023,55(03):317-323.[doi:10.15986/j.1006-7930.2023.03.001 ]
　SHAO Zhushan,GUO Xuan,YUAN Yuan,et al.Deterioration law of fracture toughness of granite under microwave irradiation[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2023,55(03):317-323.[doi:10.15986/j.1006-7930.2023.03.001 ]
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微波辐射下花岗岩的断裂韧性劣化规律研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
55
期数:
2023年03期
页码:
317-323
栏目:
出版日期:
2023-06-28

文章信息/Info

Title:
Deterioration law of fracture toughness of granite under microwave irradiation
文章编号:
1006-7930(2023)03-0317-07
作者:
邵珠山; 郭 轩; 袁 媛; 王维涛
(西安建筑科技大学 理学院,陕西 西安 710055)
Author(s):
SHAO Zhushan;  GUO Xuan;  YUAN Yuan;  WANG Weitao
(School of Science, Xi'an Univ. of Arch. & Tech., Xi'an 710055, China)
关键词:
微波;  花岗岩;  矿物组成;  断裂韧度;  热应力
Keywords:
microwave irradiation;  granite;  mineral composition;  fracture toughness;  thermal stress
分类号:
TU521
DOI:
10.15986/j.1006-7930.2023.03.001
文献标志码:
A
摘要:
微波辐射下,岩石中矿物成分微波敏感性的差异会造成岩石内温度场的不均匀,诱发热应力,导致岩石的力学性能劣化,提高破岩效率并减少能源消耗.以常见的硬岩——花岗岩为研究对象,以矿物结构显微图像为基础,建立二维数值模型,探讨了微波辐射下,矿物间温度场和应力场演化规律.实验分析了微波辐射对岩石断裂韧性的影响规律.结果表明:微波辐射下,矿物非均匀温度场诱发的热应力可使岩石的断裂韧性下降28%.岩石内部应力分布状态受到矿物分布和矿物体积含量的影响,石英边界处的应力远大于长石—黑云母边界处的应力.随着加热时间的持续,热应力可引发裂纹萌生及扩展,造成岩石的断裂韧性随辐射时间持续下降.
Abstract:
Under microwave radiation, differences in microwave sensitivity of different minerals in rocks may cause inhomogeneous temperature field in rocks, induce thermal stress, and lead to the deterioration of rock mechanical properties, which can assist mechanical rock breaking, improve rock breaking efficiency and reduce energy consumption. In this paper, taking the common hard rock--granite as the research object, based on the microscopic image of mineral structure, established a two-dimensional model, and analyzed the evolution law of temperature field and stress field between minerals under microwave radiation. The influence of microwave on fracture toughness of rock was analyzed by experimental. The results show that the thermal stress induced by non-uniform temperature field can reduce the fracture toughness of rock by 28% under microwave radiation. The stress distribution in rock is affected by mineral distribution and mineral volume content. The stress at quartz boundary is much greater than that at feldspar-biotite boundary. With the duration of heating time, the thermal stress can cause crack initiation and expansion, resulting in the fracture toughness of the rock to continue to decline with the radiation time.

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备注/Memo

备注/Memo:
收稿日期:2022-01-15修回日期:2023-05-02
基金项目:国家自然科学基金(H872287); 中国博士后科学基金(2022M712495); 陕西省自然科学基础研究计划资助项目(2023-JC-QN-0451)
第一作者:邵珠山(1986—),男,博士,教授,主要从事微波辅助固体材料破碎方面研究.E-mail:shaozhushan@xauat.edu.cn
更新日期/Last Update: 2023-06-28