深部采场高地应力、高岩溶水压和强开采扰动条件使得底板突水相比浅部采场形成特定构造、水-岩-应力及采掘工程相互作用影响下的复杂岩体水力学问题。基于不同地质构造受采动影响特征及其诱发煤层底板突水机理,将深部开采底板突水灾变模式划分为完整底板裂隙扩展型、原生通道导通型和隐伏构造滑剪型3种类型,并分析了对应的突水判据。研究认为完整底板裂隙扩展型归结于承压水影响下裂隙扩张造成彼此贯通引发承压水导升高度大于有效隔水层厚度,原生通道导通型归结于构造活化引发局部位移扩展与保护煤柱底板压缩区连通裂隙发生沟通,隐伏构造滑剪型归结于构造上方断面岩层失稳发生剪切破坏造成承压水以最短距离涌入采空区。利用深部采动高水压底板突水相似模拟试验系统探寻了3种突水灾变模式下突水通道的时空演变过程,验证了突水判据的准确性。

Deep mining has the characteristics of high ground stress,high karst water pressure and strong disturbance, compared to shallow mining,floor water inrush became a complex rock mass water problem under the influence of structure,water-rock-stress and excavation engineering. Based on the characteristics of different geological structure in- fluenced by mining and water-inrush mechanism in floor,the water inrush disaster mode in deep mining was divided into three types,floor fracture spreading type,primary channel conduction type and buried structure shear type,and the corresponding water inrush criterion was deduced. The first can be ascribed to the dank height of confined water grea- ter than the bed thickness of effective confining crack expansion caused by confined water. The second can be ascribed to the communication between separation crannies in compression zone under the protective coal pillar and the partial displacement of activated geological structure. The third can be ascribed to the rock instability above the structure of shear failure lead to the influx of confined water in goaf with the shortest distance. Study on the evolution process of the space-time water inrush channel of three kinds of water inrush mode by use of similar simulation test system for water inrush from high water pressure floor in deep mining,and the accuracy of water inrush criterion is verified.