Device and method for confined water stratum automatic water sealing post-grouting blockage

The invention relates to a device and method for confined water stratum automatic water sealing post-grouting blockage. The device comprises a drilling rod (7), and the interior of the drilling rod (7) is provided with a hollow channel. The device is characterized in that a movable sealing structure for automatically opening or sealing the hollow channel is arranged on the upper portion of the hollow channel, a circle of drilling rod holes (3) for gushing-out of confined water are formed in the side wall of the middle of the drilling rod (7), and a rubber ring (1) for expanding outwards afterthe confined water gushes out of the drilling rod holes (3) is arranged on the portion, on the outer sides of the drilling rod holes (3), of the drilling rod (7); and the rubber ring (1) seals all thedrilling rod holes (3). Compared with the prior art, according to the device and method for confined water stratum automatic water sealing post-grouting blockage, automated and rapid sealing can be achieved, the water is effe