【摘要】 为了探索承压水上底板采动断层活化破坏特征,预防底板断层活化突水,利用微震监测技术对工作面底板采动断层进行了连续动态监测。结果表明:当工作面推进距断层约60 m时,断层就出现活化迹象,且随着工作面的推进,断层活化程度及破坏范围增大;底板断层活化破坏深度达到30.4 m,接近无断层底板破坏深度的2倍,活化破碎的断层带更容易形成导水通道诱发工作面底板突水。基于承压水上采动断层活化破坏特征信号,利用Origin数据处理软件对微震监测的底板断层活化破坏深度数据进行了4次多项式拟合,应用基于突变理论推导的底板采动岩体失稳突水判据对其进行了突变分析。依据分析预测结果,并结合放水孔水量、水温等信息,及时注浆加固了底板断层活化破坏区域,使工作面顺利推过断层区域,实现承压水上断层区域工作面的安全带压开采。更多还原

【Abstract】 In order to investigate the activation failure characteristics of mining floor fault above confined aquifer and predict the water-inrush from activated floor fault,a micro-seismic monitoring technique was applied to monitor the mining floor fault.The results show that when workface advances to fault with a distance of approximately 60 m,the floor fault shows activation signs,and the activation failure depth of floor fault increases with workface advancement.The greatest failure depth is 30.4 m which is close to two times of the floor failure depth without faults.This is more likely to form guided water channel and may induce water-inrush from workface floor fault.Based on the activation failure characteristics of floor fault above confined aquifer,the Origin data processing software was used to fit the failure depth data of activated floor fault from micro-seismic monitoring into a four polynomial,therefore,the catastrophe analysis of the fitted four polynomial was carried out based on the instability water-inrush criterion of floor rock derived from catastrophe theory.According to the catastrophe analysis and the water quantity and temperature of the drain hole,the area of activated floor fault was reinforced by borehole grouting in time,which made the workface advanced through the floor fault area successfully,and achieved a safe mining above the confined aquifer.更多还原