Testing device and method for blocking water inrush hole by using magnetic self-gathering slurry

The invention provides a testing device and method for plugging a water inrush hole by using magnetic self-gathering slurry, and the device comprises a steel frame pedestal, the top of the steel frame pedestal is provided with a steel pipe elbow through a sliding bearing in a lifting manner, the steel pipe elbow is provided with a magnetic rod, and the other end of the magnetic rod is provided with an acrylic transparent pipe in an insertion fit manner. A pipe body of an acrylic transparent pipe is supported on a stand column at the top of a steel frame base through a water pipe clamp, the front end of the acrylic transparent pipe is connected with a pressure testing pump through a water pipe, the upper end of the acrylic transparent pipe is inserted into a pressure sensor and connected with a pressure displayer through a circuit, and a grouting hole in the front end of a magnetic rod is connected with a grouting air pressure tank through a grouting pipe. The grouting air pressure tank is connected with the a