Active control method and device for large deformation of deep thin-bedded surrounding rock

An active control device for large deformation of a deep thin-bedded surrounding rock, characterized by comprising a sleeve with holes on two sides, a high-strength prestressed anchor bolt inserted in the sleeve and extended outside the sleeve, and a grouting device arranged side by side with the anchor bolt and capable of grouting;

• the high-strength prestressed anchor bolt is provided with a reverse anti-skid device and a resin anchoring agent filling section located at the front end of the reverse anti-skid device and between the high-strength prestressed anchor bolt and the sleeve and formed by the applied resin anchoring agent by extending into a tail end of the deep thin-bedded surrounding rock through the construction hole, wherein the reverse anti-skid device is a conical fastener that can be fixed at the tail end of the high-strength prestressed anchor bolt;
• a decoupling structure is wound in the middle section of the high-strength prestressed anchor bolt and is formed by winding a geomembrane onto the middle section of the high-strength prestressed anchor bolt;
• a cotton yarn filling section formed by cotton yarns surrounding the high-strength prestressed anchor bolt, and a tray and a fastener located outside the sleeve are arranged successively at the head end of the high-strength prestressed anchor bolt, wherein the tray can limit the part of the high-strength prestressed anchor bolt extending out of the sleeve to the outer surface of the surrounding rock and fix the part by fit with the fastener;
• the grouting device can be extended into the sleeve after passing through the tray.