Study on the characteristics of CO2 fracturing rock damage based on fractal theory

被引:0
|
作者
Wang, Kang [1 ]
Chang, Chunguang [1 ]
机构
[1] Shenyang Jianzhu Univ, Sch Management, Shenyang 110168, Peoples R China
基金
中国国家自然科学基金;
关键词
Rock cracking; Fractal dimension; Damage; Two-factor analysis of variance; CO(2 )fracturing;
D O I
10.1016/j.tafmec.2024.104691
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
CO2 fracturing is emerging as a carbon-neutral technology for underground excavation. Traditional studies on structural stability during excavation have largely focused on the vibration characteristics of rocks. However, the inherent damage in rock layers during CO2 fracturing poses significant challenges for understanding damage mechanisms under complex multi-field coupling. This study introduces a novel approach for calculating rock damage induced by CO2 fracturing . We developed a physical model of CO2 fracturing and applied a "two-stage effect" division method, creating a staged damage calculation model based on fractal damage mechanics theory. Experiments were conducted under combined dynamic and static loads to evaluate rock damage. A two-factor Analysis of Variance (ANOVA) was used to assess the significance of dynamic and static effects on the extent of rock damage. The findings revealed that static loads guide crack propagation direction, reducing the angle between the crack and vertical axis, while initial CO2 dynamic load pressure strongly influences crack patterns, with higher pressures resulting in more fractures. The extent of rock damage observed ranged from 0.680 to 0.845. Although dynamic loads showed no significant impact, static loads exhibited a notable effect, as indicated by a P-value approaching 0.01. This study's fractal-damage calculation model provides a valuable tool for addressing stability concerns in structures affected by CO2 fracturing.
引用
收藏
页数:7
相关论文
共 50 条
  • [1] Simulation Study on Rock Crack Expansion in CO2 Directional Fracturing
    Wang, Kang
    Chang, Chunguang
    Processes, 2024, 12 (09)
  • [2] The Study on Fractal Damage Of Rock Under Hydraulic Fracturing Basing On Conversation Of Energy
    Zhao Wanchun
    Wang Tingting
    Ju Guoshuai
    Zheng Dachun
    APPLIED MECHANICS AND MECHANICAL ENGINEERING, PTS 1-3, 2010, 29-32 : 1363 - +
  • [3] Controlling Mechanism of Rock Burst by CO2 Fracturing Blasting Based on Rock Burst System
    Lan, Tianwei
    Fan, Chaojun
    Han, Jun
    Zhang, Hongwei
    Sun, Jiawei
    SHOCK AND VIBRATION, 2020, 2020 (2020)
  • [4] Study on Filtration and Damage Characteristics of Modified Dry CO2 Fracturing Fluid in Shale Gas Reservoir
    Xu, Guixi
    Wang, Shuzhong
    Luo, Xiangrong
    Jing, Zefeng
    2017 3RD INTERNATIONAL CONFERENCE ON ENERGY, ENVIRONMENT AND MATERIALS SCIENCE (EEMS 2017), 2017, 94
  • [5] Evaluation of liquid CO2 phase change fracturing effect on coal using fractal theory
    Xia, Binwei
    Liu, Xianfeng
    Song, Dazhao
    He, Xueqiu
    Yang, Tao
    Wang, Longkang
    FUEL, 2021, 287
  • [6] Experimental Study of Supercritical CO2 Fracturing Across Coal–Rock Interfaces
    Wei He
    Haojie Lian
    Weiguo Liang
    Pengfei Wu
    Yulong Jiang
    Xiaoxia Song
    Rock Mechanics and Rock Engineering, 2023, 56 : 57 - 68
  • [7] STUDY ON FRACTURE PROPAGATION OF HYDRAULIC AND SUPERCRITICAL CO2 FRACTURING IN DIFFERENT ROCK
    Zhu, Ruibin
    Tian, Ganghua
    Qu, Fengjiao
    Li, Ning
    Li, Gaofeng
    Long, Changjun
    Fan, Xuhao
    THERMAL SCIENCE, 2024, 28 (2A): : 1107 - 1112
  • [8] STUDY ON FRACTURE PROPAGATION OF HYDRAULIC AND SUPERCRITICAL CO2 FRACTURING IN DIFFERENT ROCK
    Zhu, Ruibin
    Tian, Ganghua
    Qu, Fengjiao
    Li, Ning
    Li, Gaofeng
    Long, Changjun
    Fan, Xuhao
    THERMAL SCIENCE, 2024, 28 (02): : 1107 - 1112
  • [9] Variations in surface fractal characteristics of coal subjected to liquid CO2 phase change fracturing
    Liu, Xianfeng
    Wang, Zepeng
    Song, Dazhao
    He, Xueqiu
    Yang, Tao
    INTERNATIONAL JOURNAL OF ENERGY RESEARCH, 2020, 44 (11) : 8740 - 8753
  • [10] Development of microcracks in granitic rock by liquid CO2 fracturing
    Ha, Seong Jun
    Kim, Yejin
    Yun, Tae Sup
    INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2021, 146