摘要
顶板突水严重影响着煤矿的安全生产,分析了海天煤业3618上分层工作面含水层和隔水层的特征,考虑渗流场的影响,建立以岩石孔隙率和损伤因子为自变量的损伤-渗流耦合模型,并通过FLAC^(3D)建立深埋厚煤层开采流固耦合计算模型,分析采空区覆岩塑性区、渗流场随工作面推进的演化规律。结果表明,随着工作面不断推进,塑性区和渗流场的分布形态由梯形转变为马鞍形;当工作面达到充分采动时,垮落带、裂隙带的最大高度分别为24 m、113 m;现场监测发现矿井涌水量不受地表降雨影响,50 m厚的砂质页岩被裂隙带连通。
The roof water inrush seriously affects the safety production of coal mine.The author analyzed the characteristics of aquifer and aquifuge in Haitian Coal Mine 3618 upper layered working face,considered the influence of seepage field,established the damage-seepage coupling model with the rock porosity and damage factor as the independent variable,and established the flow-solidity coupling computation model of deep-buried thick coal seam mining by FLAC^(3D),and analyzed the plastic zone of the overlying rock of goaf,and the evolution of the seepage field with the advancement of the working face.The results show that with the advancement of the working face,the distribution pattern of plastic zone and seepage field changes from trapezoidal to saddle shape;when the working face reaches full mining,the maximum heights of the collapse zone and fissure zone are 24 m and 113 m,respectively;on-site monitoring reveals that the mine water inrush is not affected by the rainfall on the surface,and the 50m thick sandy shale is connected by fissure zone.
作者
邢生生
XING Shengsheng(Zezhou Tianan Haitian Coal Industry Co.,Ltd.,Jinneng Holding Group,Jincheng 048000,China)
出处
《陕西煤炭》
2025年第7期64-68,106,共6页
Shaanxi Coal
