Effects of Heating and Liquid Nitrogen on Mechanical Characteristics and Rockburst Characteristics of Granite

被引:1
|
作者
Li, Xue [1 ]
Xue, Yi [1 ]
Dang, Fa-ning [1 ]
Zhang, Zhihao [1 ]
Zhu, Lin [1 ]
Su, Shanjie [2 ]
Wang, Shengcheng [2 ]
Liu, Ruifu [3 ]
机构
[1] Xian Univ Technol, Sch Civil Engn & Architecture, Xian 710048, Peoples R China
[2] Xuzhou Univ Technol, Sch Civil Engn, Xuzhou 221000, Peoples R China
[3] Univ Edinburgh, Sch Engn, Struct & Fire Safety Engn, Edinburgh EH9 3JL, Midlothian, Scotland
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
SHEAR FRACTURE; ROCK; STRENGTH; ENERGY; DAMAGE;
D O I
10.1155/2023/1451823
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Due to the depletion of shallow resources and the reduction of the space for human life and development, in recent years, human beings began to gradually expand to the deep underground. The increase of development depth will bring a series of safety problems, so it is particularly important to study and deal with rockburst. In this paper, based on laboratory tests, relevant literature, and research at home and abroad, the TAWD-2000 electrohydraulic servo rock mechanics testing machine and PIC-2 acoustic emission (AE) testing system are used. Uniaxial compression tests and AE monitoring tests were carried out on granite samples to analyze the property and AE characteristic parameters of granite under the action of liquid nitrogen (LN2) and to further study the fracture mode of granite. The following conclusions can be obtained: the LN2 cooling has a deterioration influence on the strength of rock, and the elastic modulus and peak stress of granite show a downward trend with the increasing number of cycles. With the cycle times of LN2 actions increasing, the AE ring count of granite and the frequency and amplitude of energy in each stage have an upward trend. When the rock reaches the failure stage, the energy at the catastrophe point increases, and the ring count also increases sharply. The RA-AF diagram of AE parameters can characterize two failure modes of rock, tensile failure and shear failure. In the process of fracture of granite samples, shear cracks dominate, leading to shear failure or compression failure of granite. Based on the method of elastic energy, the tendency index of rockburst of granite samples under different working conditions is calculated. The tendency of rockburst decreases with the decrease of elastic modulus. Under the repeated action of LN2, the tendency of rockburst of granite samples presents a downward trend, and the action of LN2 reduces the probability of rockburst to a certain extent.
引用
收藏
页数:25
相关论文
共 50 条
  • [21] Temperature Effect on AE Energy Characteristics and Damage Mechanical Behaviors of Granite
    Wang, Zhiliang
    He, Ailin
    Shi, Gaoyang
    Mei, Guoxiong
    INTERNATIONAL JOURNAL OF GEOMECHANICS, 2018, 18 (03)
  • [22] Experimental Investigation of the Damage Characteristics of High-Temperature Granite Subjected to Liquid Nitrogen Treatment
    Chengzheng Cai
    Keda Ren
    Zhixiang Tao
    Yan Xing
    Feng Gao
    Zengxin Zou
    Yinrong Feng
    Natural Resources Research, 2022, 31 : 2603 - 2627
  • [23] Experimental Study on the Pre-Peak Mechanical and Seepage Characteristics of Granite
    Zeng, Xinyan
    Lin, Wancang
    Chen, Xinyi
    Zhou, Qinglong
    APPLIED SCIENCES-BASEL, 2024, 14 (02):
  • [24] Mechanical properties and failure characteristics of granite treated with a combined water-air cooling cycle
    Chen, Bing
    Zhang, Shichuan
    Shen, Baotang
    Li, Yangyang
    Wang, Chenggong
    CASE STUDIES IN THERMAL ENGINEERING, 2022, 34
  • [25] Size effect of mechanical characteristics of sandstone and granite under uniaxial compression
    Kong, Lulin
    Wu, Jie
    Wang, Haige
    Shi, Xiangchao
    Gao, Leiyu
    Zhuo, Xiao
    Chen, Shuai
    FRONTIERS IN ENERGY RESEARCH, 2023, 11
  • [26] Study on thermal crack characteristics of granite in Shandong Province, China under different temperatures and heating/ cooling treatments
    Zhang, Weiqiang
    Shi, Zhanghao
    Zhang, Xin
    Wang, Yangzhou
    Wu, Yun
    CASE STUDIES IN THERMAL ENGINEERING, 2024, 61
  • [27] Variations of Physical and Mechanical Properties of Heated Granite After Rapid Cooling with Liquid Nitrogen
    Wu, Xiaoguang
    Huang, Zhongwei
    Song, Hengyu
    Zhang, Shikun
    Cheng, Zhen
    Li, Ran
    Wen, Haitao
    Huang, Pengpeng
    Dai, Xianwei
    ROCK MECHANICS AND ROCK ENGINEERING, 2019, 52 (07) : 2123 - 2139
  • [28] Effects of temperature and increasing amplitude cyclic loading on the mechanical properties and energy characteristics of granite
    Zhao, Guokai
    Guo, Yintong
    Chang, Xin
    Jin, Peihua
    Hu, Yaoqing
    BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 2022, 81 (04)
  • [29] Effects of Different Cooling Treatments on Heated Granite: Insights from the Physical and Mechanical Characteristics
    Liang, Qinming
    Huang, Gun
    Huang, Jinyong
    Zheng, Jie
    Wang, Yueshun
    Cheng, Qiang
    MATERIALS, 2024, 17 (18)
  • [30] Thermal Damage and Acoustic Emission Characteristics of High-Temperature Granite under Liquid Nitrogen Cooling
    Yuan, Yilei
    Zheng, Kun
    Wang, Chaolin
    Zhao, Yu
    Bi, Jing
    NATURAL RESOURCES RESEARCH, 2025, 34 (01) : 581 - 597