In order to research the damage dynamic process of the floor aquifuge including fault under the effect of mining, the 11011 working face of Zhaogu Second Mine in coal field of Jiaozuo was taken as research background, and the research method of similar simulation experiment was used; the damages of fault were observed and the displacements of every measurement point were recorded and analyzed in the whole process of mining. Based on the ‘down three zones’ theory, the maximum failure depth of working face floor and the raise height of confined water in Zhaogu No.2 Mine were calculated. The results show that the activation process of fault in coal seam floor can be divided into the stable period, the initial period and the active period. The derivation fissures near the fault zone communicate with the plastic damaged area in the floor of working face in initial period and this is precursor information that fault is activated completely. The fault slides instability in active period and the fault surface is in the open stable, and then the water passage is formed and causes water inrush. The calculated results of the maximum failure depth of working face floor and the raise height of confined water in Zhaogu No.2 Mine verify the accuracy of the test results.%为了研究含断层的底板隔水层在采动影响下的破坏动态过程，以焦作煤田赵固二矿11011工作面为研究背景，采用相似模拟试验的研究方法，对断层在整个开采过程中的活化动态进行观测，记录模型各个测点的位移变化并进行整体分析。通过“下三带”理论，计算赵固二矿工作面底板岩层的最大破坏深度和承压水导升高度，验证试验结果的准确性。研究结果表明：在采动影响下，底板断层的活化过程可分为稳定期、初始期和活化活跃期。初始期断层带附近衍生裂隙与工作面底板塑性破坏区形成沟通，是断层完全活化的前兆信息；活跃期断层滑落失稳，断层面处于张开状态，此时导水通道形成造成突水事故发生。
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