Research on Deformation and Fracture Characteristics of the Fractured Rock Mass Under Coupling of Heavy Rainfall Infiltration and Mining Unloading

被引:4
|
作者
Wang, Menglai [1 ,2 ]
Li, Xiaoshuang [3 ,4 ,5 ]
Yang, Shun [2 ,6 ]
Teng, Lin [5 ]
Chen, Qiusong [7 ]
Jiang, Song [8 ]
机构
[1] Yunnan Phosphating Grp Co LTD, Kunming, Yunnan, Peoples R China
[2] Chongqing Univ, Sch Resources & Safety Engn, Chongqing, Peoples R China
[3] Sinosteel Maanshan Gen Inst Min Res Co LTD, State Key Lab Safety & Hlth Met Mines, Maanshan, Peoples R China
[4] Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing, Peoples R China
[5] Qilu Inst Technol, Coll Civil Engn, Jinan, Peoples R China
[6] Jiangxi Univ Sci & Technol, Sch Resources & Environm Engn, Ganzhou, Peoples R China
[7] Cent South Univ, Sch Resources & Safety Engn, Changsha, Peoples R China
[8] Xian Univ Architecture & Technol, Sch Resources Engn, Xian, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
rainfall infiltration; mining unloading; fractured rock mass; fracture propagation characteristics; numerical simulation; OF-THE-ART; DAMAGE; PREDICTION; CRACK; MODEL; FLOW;
D O I
10.3389/feart.2021.792038
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The present study used PFC numerical software to examine the mechanical properties and fracture propagation characteristics of the fractured rock mass under coupling of heavy rainfall infiltration and mining unloading. Based on the engineering background of the Dexing mine, the pore water pressure is set to 0, 0.5, 1.0, 1.5, and 2.0 mpa, the true triaxial lateral unloading rate is 0.3 mpa/level and 0.6 mpa/level, and the water content state of rock is dry, natural, and saturated. Then, the true triaxial compression numerical simulation test is carried out, and the results showed that with the increase of the water content, the rock compaction stage increases, the elastic stage shortens, and the yield stage becomes more obvious. The faster the unloading rate is, the greater the influence on the rock strain is. After unloading, the stress jump point appears and the strain increase rate becomes larger, the volume of the rock increases and occurs as large s in the unloading direction, and finally it leads to severe brittle failure of the rock. With the increase of rock pore water pressure, the compressive strength and the peak strain of the rock decrease, and the pore water pressure accelerates the process of rock failure.
引用
收藏
页数:15
相关论文
共 50 条
  • [21] Study on failure characteristics of intermittent jointed rock mass under loading and unloading condition
    Zhao Y.
    Liu J.
    Jin A.
    Sun H.
    Wang B.
    Wei Y.
    Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology), 2020, 51 (07): : 1893 - 1901
  • [22] Seepage characteristics of fractured rock mass with non-equal width filling under cyclic loading
    Wang, Shuren
    Zhang, Jiyun
    Li, Chunliu
    Li, Zhichao
    Yu, Yongqiang
    AIN SHAMS ENGINEERING JOURNAL, 2022, 13 (06)
  • [23] Numerical simulation of fracture failure characteristics of rock mass with multiple parallel fractures under seepage stress coupling
    Peng-fei Wang
    Chang-hong Li
    Wen-hui Tan
    Arabian Journal of Geosciences, 2022, 15 (7)
  • [24] Tensile Characteristics and Fracture Mode of Frozen Fractured Rock Mass Based on Brazilian Splitting Test
    Wang, Tingting
    Li, Pingfeng
    Tang, Chun'an
    Zhang, Bingbing
    Yu, Jiang
    Geng, Tao
    APPLIED SCIENCES-BASEL, 2022, 12 (22):
  • [25] Model experimental research on deformation and subsidence characteristics of ground and wall rock due to mining under thick overlying terrane
    Ren, Weizhong
    Guo, Chengmai
    Peng, Ziqiang
    Wang, Yonggang
    INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2010, 47 (04) : 614 - 624
  • [26] Numerical Simulation of Fracture Failure Characteristics of Rock-Mass with Multiple Nonparallel Fractures Under Seepage Stress Coupling
    Wang, Pengfei
    Xie, Yaoshe
    GEOTECHNICAL AND GEOLOGICAL ENGINEERING, 2022, 40 (05) : 2769 - 2779
  • [27] Hydraulic and solute transport coupling model for fractured rock mass with discrete fracture network using computational method
    Li X.-X.
    Xu Y.
    Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering, 2019, 41 (06): : 1164 - 1171
  • [28] Numerical Simulation of Fracture Failure Characteristics of Rock-Mass with Multiple Nonparallel Fractures Under Seepage Stress Coupling
    Pengfei Wang
    Yaoshe Xie
    Geotechnical and Geological Engineering, 2022, 40 : 2769 - 2779
  • [29] Research on meso-scale deformation and failure mechanism of fractured rock mass subject to biaxial compression
    Xiaoming W.
    Yuanjie X.
    Wenbing S.
    Juanjuan R.
    Zhengxing C.
    Hua L.
    Arabian Journal of Geosciences, 2021, 14 (14)
  • [30] Dynamic response characteristics and damage calculation method of fractured rock mass under blasting disturbance
    Jiang, Xudong
    Xue, Yiguo
    Ren, Xingtao
    Kong, Fanmeng
    Liao, Xiaomu
    INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 2024, 192