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在系统研究王楼煤矿13301采煤工作面断层滞后突水特征的基础上,对断层滞后突水渗-流转化机制进行了深入分析,提出了“开采扰动-渗透弱化”双阶段理论模型,并进一步将断层渗透弱化阶段分解为非饱和渗流阶段、低速稳定饱渗流阶段以及快速饱和渗流阶段3个阶段;基于突水过程的流态变化的普遍特征,分别通过理查德方程、达西定律以及布里克曼方程建立了各阶段的数学物理模型;建立了煤层工作面回采有限元模型,实现了对断层组内部地下水由非饱和到饱和、由低速流动到快速流动、断层组渗透性由弱到强的过程的完整描述,其涌水量计算结果与实际基本吻合。
Based on the systematical study on the characteristics of fault hysteretic water inrush of 13301 coal mining face in Wanglou Coal Mine, the mechanism of seepage-water transformation of fault hysteretic inrush water is deeply analyzed and the double-stage theoretical model of “mining disturbance-seepage weakening” , And further decomposes the stage of weakened permeability into three stages of unsaturated seepage, low-speed saturated seepage and rapid seepage. Based on the general characteristics of water flow inrush process, through the Richard equation, Darcy Law and Brickell’s equation are established. The finite element model of coal seam working face is set up, and the groundwater in the fault group is realized from unsaturated to saturated, from low velocity to fast flow, The complete description of the process from weak to strong, the calculated results of its inflow consistent with the actual basic.