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
  • [1] Experimental study on the effect of heating and liquid nitrogen-cooling cyclic treatment on mechanical properties and fracturing characteristics of granite
    Xue, Yi
    Wang, Linchao
    Liu, Jia
    Ranjith, P. G.
    Gao, Feng
    Cai, Chengzheng
    Xie, Heping
    INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2024, 176
  • [2] Effect of weakening characteristics of mechanical properties of granite under the action of liquid nitrogen
    Wang, Linchao
    Zhang, Wan
    Cao, Zhengzheng
    Xue, Yi
    Liu, Jianqiang
    Zhou, Yang
    Duan, Chenyang
    Chen, Tong
    FRONTIERS IN ECOLOGY AND EVOLUTION, 2023, 11
  • [3] Effect of liquid nitrogen cooling on the permeability and mechanical characteristics of anisotropic shale
    Jiang, Long
    Cheng, Yuanfang
    Han, Zhongying
    Gao, Qi
    Yan, Chuanliang
    Wang, Huaidong
    Fu, Lipei
    JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY, 2019, 9 (01) : 111 - 124
  • [4] Transition Threshold of Granite Mechanical Characteristics at High Temperature
    Guo, Hongjun
    Ji, Ming
    Liu, Dapeng
    ADVANCES IN CIVIL ENGINEERING, 2020, 2020
  • [5] Effects of Cyclic Heating and Water Cooling on the Physical Characteristics of Granite
    Shi, Xiangchao
    Gao, Leiyu
    Wu, Jie
    Zhu, Cheng
    Chen, Shuai
    Zhuo, Xiao
    ENERGIES, 2020, 13 (09)
  • [6] Mechanical and damage evolution characteristics of granite after heating-cooling cycles
    Peng, Kang
    Ren, Ji
    Wang, Yuan-min
    Luo, Song
    Long, Kun
    JOURNAL OF CENTRAL SOUTH UNIVERSITY, 2023, 30 (12) : 4082 - 4096
  • [7] Experimental Study on Mode I Fracture Characteristics of Granite after Low Temperature Cooling with Liquid Nitrogen
    Wang, Linchao
    Xue, Yi
    Cao, Zhengzheng
    Kong, Hailing
    Han, Jianyong
    Zhang, Zhizhen
    WATER, 2023, 15 (19)
  • [8] Rockburst proneness considering energy characteristics and sample shape effects
    Luo, Song
    Gong, Fengqiang
    Peng, Kang
    Liu, Zhixiang
    JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING, 2024, 16 (07) : 2441 - 2465
  • [9] Discussions on the Complete Strain Energy Characteristics of Deep Granite and Assessment of Rockburst Tendency
    Chen, Lu
    Guo, Lijie
    SHOCK AND VIBRATION, 2020, 2020
  • [10] AE Characteristics of Rockburst Tendency for Granite Influenced by Water Under Uniaxial Loading
    Zhang, Yihan
    Ma, Ju
    Sun, Daoyuan
    Zhang, Lingyun
    Chen, Yongchao
    FRONTIERS IN EARTH SCIENCE, 2020, 8