Brazilian split tests for salt rock were carried out with a servo-controlled test machine RMT-150B, and acoustic emission (AE) detections were conducted at the same time. The results indicate that the deformation characteristics before the peak load in Brazilian split tests are similar to those of uniaxial compression test which could be divided into four stages, namely compression, elasticity, yielding and failure stage. AE events in compression and elasticity stage are totally low in energy and accumulation number. Starting from the yield stage, AE events increase rapidly, and energy and accumulation number grow quickly. The specimens suddenly fracture when the load exceeds capacity, and the residual stress rapidly disappears. In this test, the sign for specimen failure could be judged through observing ringing counting, accumulation number and energy, so as to provide reference for engineering practice.
[1] 杨春和, 马洪岭, 刘建锋. 循环加、卸载下盐岩变形特性试验研究[J]. 岩土力学, 2009, 30(12): 3562-3568. Yang Chunhe, Ma Hongling, Liu Jianfeng. Study of deformation of rock salt under cycling loading and unloading[J]. Rock and Soil Mechanics, 2009, 30(12): 3562-3568.
[2] 刘江, 杨春和, 吴文, 等. 盐岩短期强度和变形特性试验研究[J]. 岩石力学与工程学报, 2006, 25(S1): 3104-3109. Liu Jiang, Yang Chunhe, Wu Wen, et al. Experiment study on thortterm strength and deformation properties of rock salts[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(S1): 3104-3109.
[3] 吴文, 杨春和. 盐岩的压缩试验研究与损伤模型模拟[J]. 岩石力学与工程学报, 2006, 25(S2): 3709-3713. Wu Wen, Yang Chunhe. Experimental study on salt rock under compression and damage model simulation[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(S2): 3709-3713.
[4] 翟松韬, 吴刚, 张渊, 等. 单轴压缩下高温盐岩的力学特性研究[J]. 岩石力学与工程学报, 2014, 33(1): 105-111.Zhai Songtao, Wu Gang, Zhang Yuan, et al. Mechanical characteristics of salt rock subjected to uniaxial compression and high temperature[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(1): 105-111.
[5] 陈结, 姜德义, 邱华富, 等. 卤水浸泡后盐岩声发射特征试验研究[J]. 岩土力学, 2013, 34(7): 1937-1942. Chen Jie, Jiang Deyi, Qiu Huafu, et al. Study of acoustic emission character of salt rock soaked in brine[J]. Rock and Soil Mechanics, 2013, 34(7): 1937-1942.
[6] 姜德义, 陈结, 任松, 等. 盐岩单轴应变率效应与声发射特征试验研究[J]. 岩石力学与工程学报, 2012, 31(2): 326-336. Jiang Deyi, Chen Jie, Ren Song, et al. Experimental study of strain rate effect and acoustic emission characteristics of salt rock under uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(2): 326-336.
[7] 任松, 白月明, 姜德义, 等. 周期荷载作用下盐岩声发射特征试验研究[J]. 岩土力学, 2012, 33(6): 1613-1618, 1639. Ren Song, Bai Yueming, Jiang Deyi, et al. Experimental research on acoustic emission property of salt rock under cyclic loading[J]. Rock and Soil Mechanics, 2012, 33(6): 1613-1618, 1639.
[8] 王莉, 谭卓英, 周喻, 等. 煤样巴西劈裂试验中声发射特性的细观模拟[J]. 北京科技大学学报, 2014, 36(3): 3-10. Wang Li, Tan Zhuoying, Zhou Yu, et al. Mesoscopic simulation of the acoustic emission characteristic of coal samples in Brazilian test[J]. Journal of University of Science and Technology Beijing, 2014, 36(3): 3-10.
[9] 苏承东, 张盛, 唐旭. 砂岩巴西劈裂疲劳破坏过程中变形与强度特征的试验研究[J]. 岩石力学与工程学报, 2013, 32(1): 41-48. Su Chengdong, Zhang Sheng, Tang Xu. Emperimental research on deformation and strength characteristics in process of Brazilian split fatigue failure of sandstone[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(1): 41-48.
[10] 孟京京, 曹平, 张科, 等. 基于颗粒流的平台圆盘巴西劈裂和岩石抗拉强度[J]. 中南大学学报: 自然科学版, 2013, 44(6): 2449-2454. Meng Jingjing, Cao Ping, Zhang Ke, et al. Brazil split test of flattened disk and rock tensile strength using particle flow code[J]. Journal of Central South University: Science and Technology, 2013, 44(6): 2449-2454.
[11] 付军辉, 黄炳香, 刘长友, 等. 煤试样巴西劈裂的声发射特征研究[J]. 煤炭科学技术, 2011, 39(4): 25-28. Fu Junhui, Huang Bingxiang, Liu Changyou, et al. Study on acoustic emission features of coal sample Brazilian splitting[J]. Coal Science and Technology, 2011, 39(4): 25-28.
[12] 郭印同, 蔡振华. 潜江超深盐矿盐岩力学特性的试验研究[J]. 矿业研究与开发, 2010, 30(2): 23-27. Guo Yintong, Cai Zhenhua. Experimental studies on mechanical properties of salt rock of Qianjiang salt mine[J]. Mining R & D, 2010, 30 (2): 23-27.
[13] 苏承东, 翟新献, 李宝富, 等. 砂岩单三轴压缩过程中声发射特征的试验研究[J]. 采矿与安全工程学报, 2011, 28(2): 225-230. Su Chengdong, Zhai Xinxian, Li Baofu, et al. Experimental study of the characteristics of acoustic emission for sandstone specimens under uniaxial and triaxial compression tests[J]. Journal of Mining & Safety Engineering, 2011, 28(2): 225-230.
