煤峪口矿81010工作面煤层底板裂隙发育特征及防治

针对煤炭开采过程中出现的突水事故,采用RFPA数值模拟软件建立采动模型,对底板裂隙破断过程和声发射进行模拟,研究煤层底板采动裂隙扩展突水通道,结果表明:离断层越近,断层内水压导升高度越高,断层出现活化,裂隙扩展发育,最终贯通形成导水通道,在进行注浆改造后,单个钻孔的最大涌水量为8 m³/h,说明注浆加固防治水效果较好,能确保工作面的安全回采。

Development characteristics and prevention of seam floor fissure in 81010 working face of Meiyukou Mine

Aiming at the water inrush accident occurred during coal mining,the RFPA numerical simulation software was used to establish a mining model,the fracture process of floor cracks and acoustic emission were simulated,and the water inrush channel of coal floor mining cracks was studied.The results showed that:off the fault The closer,the higher the hydraulic pressure rise in the fault,the activation of the fault,the expansion of fractures,and the formation of a water channel.After grouting,the maximum water inflow of a single borehole is 8m³/h,indicating grouting The effect of strengthening and preventing water is better,and it can ensure the safe mining of the working face.