The water burst of roof on working face has been one of the significant geotechnical engineering problems that needs to be urgently resolved. The coupling effects of seepage and damage on the amount and intensity of water inrush from the roof are critically important. In this paper, the seepage-damage coupling mathematical model of the aquifer in the working face is studied, and the seepage-damage coupling mechanics model at different stages of the aquifer is established. Under the coupling of permeability and damage, the water-soil characteristics of the aquifer in the 101163 working face of Mindong were numerically simulated by establishing the constitutive relation between vertical stress and permeability coefficient. The numerical results show that the stress concentration factor of the mining stress field gradually increases with the coal seam mining. The water-flowing fractured zone of the overburden is close to the communication of the quaternary aquifer. When the coal seam is excavated 250–300 m. Three free surfaces appear in the groundwater pressure field, and a large falling funnel is formed to establish a deep flow S-well well flow model. The research on the mining stress field and seepage field is carried out in combination with the Jakob formula. It is found that two sectors with reduced permeability of the fan surface are formed in front of the work. The variation law of the apocalyptic permeability infiltration under different mining distances, different coal seam thicknesses, different water pressures, and different roof management modes is studied systematically. The research indicates that the seepage flow under the condition of seepage infiltration of the lower aquifer should be between 50% and 100% of the traditional calculation method. The research results can help to deepen the understanding of the process of water inrush under the coupling of stress and seepage.

中文翻译：

---

渗损耦合下工作面超前减渗特性探讨

工作面顶板突水已成为亟待解决的重大岩土工程问题之一。渗漏和损坏对屋顶突水量和强度的耦合效应至关重要。本文研究了工作面含水层的渗损耦合数学模型，建立了含水层不同阶段的渗损耦合力学模型。在渗透率与损伤耦合作用下，通过建立竖向应力与渗透系数的本构关系，数值模拟闽东101163工作面含水层的水土特征。数值结果表明，随着煤层开采，开采应力场的应力集中因子逐渐增大。上覆地层的水流裂隙带靠近第四系含水层的连通。当煤层开挖250-300 m时。地下水压力场出现三个自由面，形成一个大的落水漏斗，建立深流S井井流模型。结合Jakob公式对开采应力场和渗流场进行了研究。发现在工作前形成了两个扇面渗透性降低的扇面。不同开采距离、不同煤层厚度、不同水压下世界末期渗透率的变化规律，并对不同的屋顶管理模式进行了系统的研究。研究表明，下层含水层渗入渗流条件下的渗流应在传统计算方法的50%～100%之间。研究结果有助于加深对应力与渗流耦合作用下突水过程的认识。