赵固二矿封闭不良钻孔井下封堵技术研究

 封闭不良钻孔是影响矿区安全生产的重要隐患之一。赵固二矿井田内存在大量封闭不良钻孔,为防止在开采过程中,封闭不良钻孔成为矿井充水通道造成矿井突水,采用井下注浆封堵技术对钻孔进行了加固,分析了矿井水文地质条件,设计了钻孔结构,制定了封堵方案技术措施,提出了双重固管结构。现场生产实践表明：注浆达到了预期要求,工作面实现了安全开采。该成果对注浆加固技术具有一定的参考价值和指导意义。

Research on Sealing Technology for Poor Sealed Boreholes in Underground Mine of Zhaogu No.2 Mine

The poor sealing borehole is one of important hidden troubles that affect safety production of mine. There are many poor sealing boreholes in Zhaogu No.2 coal mine. In order to avoid the poor sealing boreholes becoming conductor and forming water-inrush, the plugging technology of underground mine was adopted to reinforce borehole. The hydro-geological conditions was analyzed and the borehole structure was designed. The plugging technology was made and the duplex fixed pipe structure was put forward. The production practice shows that the plugging reached expected requirement and the working face realized safety production. The results have certain value and significance to the grouting technology.