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Research of microseismic monitoring of goaf water inrush dynamic hazards

HE Jiang  DOU Lin-ming  GONG Si-yuan  
【摘要】:Goaf water inrush is one serious dynamic disaster in coal mining. Based on the microseismic monitoring of goaf water inrush, the energy emission rate ξ and spatial density ε were proposed to present the microseismic activity in time and space. The microseismic monitoring in Junde Coal Mine showed that, the energy and events increased continuously and the maximum energy emission rate got up step by step before water inrush, and all the three parameters reach the peak values when water inrush happened, and they decreased after water inrush. The area of high energy spatial density has consistency with the center area of water inrush. It is efficient to analyze the reason of water inrush by the energy spatial density. In the light of monitoring the risk of water inrush, the method of partition and time-sharing monitoring was proposed, which has directive significance in water inrush observation.

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