Numerical and Field Investigations of Dynamic Failure Caused by Mining-Induced Tremor Based on Focal Mechanism

被引:1
作者
He, Zhi-Long [1 ,2 ]
Zhang, Yan-Bo [1 ,2 ]
Lu, Cai-Ping [3 ]
Wang, Qi [4 ]
Yao, Xu-Long [1 ,2 ]
Song, Jie-Fang [3 ]
Lai, You-Bang [5 ]
机构
[1] North China Univ Sci & Technol, Coll Min Engn, Tangshan 063210, Hebei, Peoples R China
[2] North China Univ Sci & Technol, Hebei Prov Ctr Green Intelligent Min Technol Innov, Tangshan 063210, Hebei, Peoples R China
[3] China Univ Min & Technol, Sch Mines, Key Lab Deep Coal Resource Min, Minist Educ, Xuzhou 221116, Jiangsu, Peoples R China
[4] China Univ Min & Technol Beijing, State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China
[5] Sijiaying Yanshan Iron Mine Co Ltd, Hebei Iron & Steel Grp, Tangshan 063210, Hebei, Peoples R China
基金
中国国家自然科学基金;
关键词
Mining-induced tremors; Moment-tensor inversion (MTI); Numerical simulation; Stress-wave field; Dynamic failure; GROUND MOTION; SEISMICITY;
D O I
10.1007/s00603-024-03991-7
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
The rupture mechanism of a seismic source governs the spatiotemporal distribution and intensity characteristics of the radiated stress-wave field and significantly affects the dynamic disasters of roadways triggered by seismic disturbances. In this study, we propose a method to simulate seismic sources with arbitrary rupture mechanisms based on moment-tensor theory. Subsequently, using the dynamic instability of tailentry at the 63upper06 working face Dongtan Coal Mine induced by an "8.30" strong mining-induced tremor as the engineering context, we calibrate the characteristics of the seismic source via moment-tensor inversion. The entire process from the excitation of the strong seismic source, the propagation of stress waves, and the eventual triggering of roadway failure and instability is simulated. Concurrently, variables representing P- and S-waves are formulated based on the relationship between the vibration and propagation directions, and the roles of both waves in the dynamic instability of the tailentry are investigated. The results indicate that (1) during the mining at the 63upper06 working face, concentrated stress is transferred to the strong seismic-source area and the advanced area of the coal wall at the tailentry, thus providing static load conditions for the occurrence of strong seismic events and the dynamic instability of the tailentry. (2) P-waves primarily exert tensile and compressive stresses along the propagation direction in the medium, thereby resulting in localized stress variations, whereas S-waves induce shear effects between adjacent wave paths because of their opposing velocity directions. (3) The "8.30" strong mining-induced tremor is characterized by tensile failure, with P-waves exhibiting the greatest intensity in the horizontal and vertical directions, and S-waves exhibiting the highest intensity at an angle of 45 degrees from the seismic source, thus contributing significantly to the damage and instability of the roadway owing to the relative spatial position between the roadway and seismic source. (4) The 100 m range ahead of the coal wall at the tailentry experiences significantly greater static and dynamic disturbances compared with other areas, thus resulting in the most severe damage. A method that can simulate seismic sources with any rupture mechanism is proposed based on moment-tensor theory.Variables representing and waves are formulated based on the relationship between the vibration and propagation directions.The effect of seismic-source rupture characteristics on the stability of a disturbed roadway is elucidated.
引用
收藏
页码:8679 / 8700
页数:22
相关论文
共 39 条
  • [1] Bi RY, 2021, RES CUTTING ROOF PRE
  • [2] Influence of fluids on VP/VS ratio: increase or decrease?
    Brantut, Nicolas
    David, Emmanuel C.
    [J]. GEOPHYSICAL JOURNAL INTERNATIONAL, 2019, 216 (03) : 2037 - 2043
  • [3] Cieslik Jerzy, 2017, Journal of Sustainable Mining, V16, P94, DOI 10.1016/j.jsm.2017.10.002
  • [4] Dubinski J, 2017, E3S WEB C, P24
  • [5] Durrheim RJ, 2005, J S AFR I MIN METALL, V105, P409
  • [6] INDUCED SEISMICITY IN THE GEYSERS GEOTHERMAL AREA, CALIFORNIA
    EBERHARTPHILLIPS, D
    OPPENHEIMER, DH
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH, 1984, 89 (NB2): : 1191 - 1207
  • [7] Numerical simulation of fault-slip rockbursts using the distinct element method
    Gao, Fuqiang
    Kang, Hongpu
    Li, Jianzhong
    [J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2021, 110
  • [8] Dynamic Modelling of Seismic Wave Propagation due to a Remote Seismic Source: A Case Study
    He, Shengquan
    Chen, Tuo
    Vennes, Isaac
    He, Xueqiu
    Song, Dazhao
    Chen, Jianqiang
    Mitri, Hani
    [J]. ROCK MECHANICS AND ROCK ENGINEERING, 2020, 53 (11) : 5177 - 5201
  • [9] Numerical and Field Investigations of Rockburst Mechanisms Triggered by Thick-Hard Roof Fracturing
    He, Zhi-Long
    Lu, Cai-Ping
    Zhang, Xiu-Feng
    Guo, Ying
    Meng, Zhao-He
    Xia, Lei
    [J]. ROCK MECHANICS AND ROCK ENGINEERING, 2022, 55 (11) : 6863 - 6886
  • [10] Kaiser P.K., 1996, Canadian Rockburst Support Handbook