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| IDENTIFICATION OF WATER INRUSH PROCESS OF UNKNOWN WATER BODY USING MICROSEISMIC MONITORING TECHNIQUE |
| LI Tie，JI Hongguang |
| (School of Civil and Environment Engineering，University of Science and Technology Beijing，Beijing 100083，China) |
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Abstract The process of underground water accumulation and inrush based on the elastic waves generated by rock fracturing is investigated. It is found that before water inrush，there are a few distinct phenomena such as irregularity of wave velocity ratio VP/VS in the low value range，irregularity of amplitude ratio VSH /VPH in the high value range，and irregularity of major frequency in the low value range，waveform change，and quietness of microseismic activities before the fracturing of the main wall which bears water. It is proposed to use surface microseismic monitoring technique to detect unknown water body and reduce water inrush risks in deep mines. This technique can monitor and analyze the information carried in the seismic waves from either rock fracturing or blasting. The remote monitoring can be realized with the proposed method for the whole mine in real time for the monitoring is far way from the source，thus the presented method is deemed as a safe monitoring technique.
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Received: 31 May 2009
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LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
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