在地质岩心钻探、工程地质钻探过程中,经常遇到护孔和堵漏问题。目前常用的方法有:1.用孔口管隔绝地表堆积层和复盖层;2.在各种不稳定地层采用优质泥浆护孔和防止渗漏;3.用堵塞水泥或其它堵塞材料封闭严重漏失裂隙或溶洞孔段,固结严重坍塌破碎带,填补严重超径孔段;4.在上述第2、3种情况下,用某些高分予聚合物注灌护孔或堵漏; In the geological core drilling, engineering geological drilling process, often encounter the problem of retaining holes and plugging. Commonly used methods are: 1. Use orifice tube to isolate surface layers and overburden; 2. Use high-quality mud guard holes and prevent seepage in various unstable formations; 3. Close the wall with blockage cement or other plugging materials Lost cracks or cave sections, the collapse of serious consolidation collapse, to fill the serious overdraft hole; 4 in the first two cases, with some high polymer injection hole or plugging;