Jin Dewu, Duan Jianhua, Li Lianchong, et al. 2021. Microseismicity based research for mining induced fracture propagation and water pathway identification technology of floor[J]. Journal of Engineering Geology, 29(4): 962-971. doi: 10.13544/j.cnki.jeg.2021-0330.
    Citation: Jin Dewu, Duan Jianhua, Li Lianchong, et al. 2021. Microseismicity based research for mining induced fracture propagation and water pathway identification technology of floor[J]. Journal of Engineering Geology, 29(4): 962-971. doi: 10.13544/j.cnki.jeg.2021-0330.

    MICROSEISMICITY BASED RESEARCH FOR MINING INDUCED FRACTURE PROPAGATION AND WATER PATHWAY IDENTIFICATION TECHNOLOGY OF FLOOR

    • The coal mining in North China type coalfield is faced with the problems of high water yield, high water pressure, complex geological structure, thin aquifuge and so on.Water disaster control faces great challenges.The identification of flowing pathway is the key problem of floor water disaster prevention.Based on the principle of microseismic monitoring, the identification method of water diversion pathway is put forward based on microseismic energy density and rock connectivity.Taking the floor water inrush monitoring project of the panel 11916 in East well of Gequan mine, Hebei province as the background, the proposed identification technology is applied.There are 1~3 dominant fissures in the collapse column area of the panel 11916 through inverting the connected flowing pathway.The fissures are verified with apparent resistivity monitoring data.The results show that, the method of characterizing the conductivity of mining induced fractures in floor strata is feasible using microseismic energy density and connectivity.This study provides a new way to promote the application of microseismic monitoring technology in floor water disaster prevention, and lays an important foundation for improving the level of floor water inrush monitoring and early warning.
    • loading

    Catalog

      /

      DownLoad:  Full-Size Img  PowerPoint
      Return
      Return