深部煤炭资源地质条件复杂，平煤矿区极近距离煤层赋存特征明显，极近距离煤层组重复采动，矿压叠加影响机制及显现规律复杂，防治水难度增大。本研究旨在探讨深部极近距离煤层在重复采动过程中出水机理，采用理论分析、现场实测、属性分类等方法，分析了平煤十矿己17-33200工作面微震事件时空演化规律、出水模式。结果表明，极近距离重复采动微震深部事件分布集中，且上分层出水点、水量增大处、下分层来压等处微震呈现不同的响应特征。基于微震事件时空演化规律及各含水层微震属性分析，构建了“深部寒武系灰岩为树根、中部太原组灰岩为树干、浅部出水点为树冠”的树模式。寒武系灰岩为导水通道主干道，薄层灰岩含水层呈现“吞吐”特征，随水量变化作用不同，浅部出水点分散，受原岩破碎带及底板采动破坏带控制，主要为岩层破碎处、矿压集中处或低洼地段。微震震源张剪属性随着通道变化和水量增减呈现相应变化，通道扩充时，张性破裂为主；通道闭合时，张性破裂减少。研究提出深部重复采动“树模式”出水机理，可提升近距离煤层重复采动水害预警能力，为类似条件下防治水机理研究提供参考。

 The geological conditions of deep coal resources are complex. The occurrence characteristics of extremely close coal seams in Pingmei coal mine area are obvious. The extremely close coal seam group is repeatedly mined. The influence mechanism and manifestation law of mine pressure superposition are complex, and the difficulty of water prevention and control is increased. The purpose of this study was to explore the mechanism of water outburst in the process of repeated mining in deep extremely close coal seams. By means of theoretical analysis, field measurement and attribute classification, the spatial and temporal evolution law and water outburst mode of microseismic events in No.Ji17-33200 Face of Pingdingshan No.10 Coal Mine were analyzed. The results showed that the distribution of deep microseismic events in extremely close repeated mining was concentrated, and the microseismic response characteristics were different at location of the upper layer water outburst point, the increase of water volume and the pressure of the lower layer. Based on the temporal and spatial evolution of microseismic events and the analysis of microseismic attributes of each aquifer, a tree model of ' deep Cambrian limestone as the root, central Taiyuan Formation limestone as the trunk, and shallow water outburst as the crown ' was constructed. The Cambrian limestone was the main channel of the water diversion channel. The thin limestone aquifer presented the characteristics of ' huff and puff '. With the change of water volume, the shallow water outburst points were dispersed, which were controlled by the original rock fracture zone and the floor mining failure zone, mainly at the broken rock stratum, the concentrated mine pressure or the low-lying section. The tensile and shear properties of microseismic source changed with the change of channel and the increase and decrease of water volume. When the channel expanded, the tensile fracture was dominant. When the channel was closed, the tensile rupture was reduced. The study proposed a deep repeated mining ' tree model ' water outburst mechanism, which could improve the forewarning ability of repeated mining water disaster in close-distance coal seams, and provide a reference for the study of water prevention and control mechanism under similar conditions.