Small bore inner wall strain foil pasting method for rock stress releasing test and apparatus thereof

The invention discloses a small bore inner wall strain foil pasting method for a rock stress releasing test and an apparatus thereof. Two air bags are arranged at a fixing device, a strain foil pasting laying piece and a binder storage apparatus are respectively arranged at two air bags, and a groove connected with the binder storage apparatus is arranged at the strain foil pasting laying piece; the strain foil is temporarily fixed at the strain foil pasting laying piece, and the air bag is conveyed to a set position in a small bore; the air bag of the binder is inflated, the binder is extruded between the groove and the inner wall of the bore, the air bag of the strain foil pasting laying piece is inflated, and the strain foil is pasted at the inner wall of the bore; after the strain foilis fixed, the air bag, the binder storage apparatus and the strain foil pasting laying piece are recovered through twisting, and the strain foil can be pasted. The pasting work of the strain foil atthe inner wall of the smal