The evolution of water flow channels typically includes a micro-fracture precursor, especially during deep mining. However, this precursor has not been well characterized. To get more insight into this precursor and its development, the no. 22517 panel in the Dongjiahe coal mine was studied using microseismic monitoring. The energy density of microseismic events was used to identify the spatial location and formation process of the water flow channels. Microseismic focal parameters, such as seismic energy, seismic potency, apparent stress, seismic moment, apparent volume, energy index, and the Gutenberg-Richter b value were determined for the micro-fracture precursors of the water flow channels. The cumulative apparent volume increased significantly and the Gutenberg-Richter b value decreased rapidly, corresponding to the micro-fracture precursor of the water flow channel. Based on the results, a Gutenberg-Richter b value of 0.7 may be an early warning threshold for the formation of a water-flow channel. Finally, a real-time early warning method for water inrush disasters in floor was established based on microseismic monitoring, geophysics, and the water inrush coefficient.

水流通道的演变通常包括微裂缝前兆，尤其是在深部开采过程中。然而，该前体尚未被很好地表征。要获得对该前体及其发展的更多了解，没有。利用微震监测技术对董家河煤矿22517面板进行了研究。微地震事件的能量密度用于确定水流通道的空间位置和形成过程。确定了水流通道的微裂缝前兆的微震震源参数，例如地震能量，地震效价，视应力，地震矩，视体积，能量指数和古腾堡-里希特b值。累积表观体积显着增加，Gutenberg-Richter b值迅速降低，对应于水流通道的微裂缝前驱体。根据结果​​，古腾堡-里希特b值为0.7可能是形成水流通道的预警阈值。最后，基于微震监测，地球物理和突水系数，建立了一种实时的底板突水灾害预警方法。