从古山立井的地质工程条件出发 ,针对微空隙岩体注浆防渗的技术难点 ,在分析前几次注浆失效原因的基础上 ,选择合适的注浆材料和注浆工艺 ,在古山立井主、副井各 30 0m的渗漏段注浆 ,将涌水量由原来的 37m3 /h降至 5m3 /h以下。注浆前后采取了井壁及岩石样品 ,用扫描电子显微镜和压汞试验对样品的微观结构进行了测试分析 ,从微观机理上解释了前几次注浆工程失效和本次注浆成功的原因。 Based on the geotechnical engineering conditions of the Gushan vertical shaft and the technical difficulties of the grouting seepage prevention of the micro-gap rock mass, on the basis of analyzing the reasons of previous grouting failure, the suitable grouting material and grouting technology are selected. , The auxiliary well of the 30 o m of the leakage section grouting, the influx of water from the original 37m3 / h down to 5m3 / h or less. The borehole and rock samples were taken before and after grouting. The microstructure of the samples was analyzed by scanning electron microscopy and mercury intrusion porosimetry. The microscopic mechanism explained the failure of previous grouting projects and the reasons for the successful grouting .