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Volume 40 Issue 3
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DU Tao-tao. Propagation and response laws of mine seism[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(3): 418-425. DOI: 10.11779/CJGE201803004
Citation: DU Tao-tao. Propagation and response laws of mine seism[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(3): 418-425. DOI: 10.11779/CJGE201803004
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Propagation and response laws of mine seism

  • 1.Coal Mining & Designing Department, Tiandi Science & Technology Co., Ltd., Beijing 100013, China;
    2. Coal Mining Branch, China Coal Research Institute, Beijing 100013, China

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  • Received Date: March 22, 2016
  • Published Date: March 24, 2018
    Graphical Abstract
    • Abstract
  • In order to analyze the response degree problem that seismic waves of surrounding rock are different at places with different distances from mine seism source, the ARAMIS M/E microseismic monitoring system, PASAT-M portable microseismic system and rockburst multi-parameter process monitoring system are employed to study the propagation and response laws of mine seism. The results show that: (1) The rockburst multi-parameter process monitoring system can capture variations of single-parameter (coal stress) and multi-parameter (coal stress, displacement of roadway and anchored bolt force) at the moment of mine seism; (2) For the single parameter laws of mine seism, the response time is short (368 ms), the mine seism-induced increase of the maximum coal stress reaches 0.9 MPa, which is 75 m from seism source, the final increase value of coal stress is 0.5 MPa, and not all the response of mine seism is multi-parameter simultaneous response; (3) For the multi-parameter laws of mine seism, the response time is not synchronized and varies from a few hundred milliseconds to a few minutes. At the place 150 m from the seism source, the coal stress decreases by 0.7~0.8 MPa, the anchored bolt force decreases by 7~8 kN, and the top-coal displacement increases by 4 mm. The displacement data of strata within 10 hours before the mine seism is captured with the duration time of 1000 ms and the maximum displacement of 24 mm, and they can be used as the prediction information for mine seism; (4) The attenuation of seismic energy propagation in the surrounding rock of the mine is exponential, that is E=E0eηD. The energy attenuation is fast, within 200 m range of seism source. The attenuation of main frequency in the surrounding rock is exponential' f=f0eηD. The response of mining field and roadway within 200 m-range of the seism source is quite obvious, and the area is quite consistent with that of rockburst induced by mine seism. The quantitative study on the process of the propagation attenuation of mine seism to the response is important to the further improvement of the monitoring, early warning, prevention and control technology of rockbursts.
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    • References (22)
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