VCR method blast hole bottom plugging device and plugging method

The invention discloses a VCR method blast hole bottom plugging device and a plugging method. The VCR method blast hole bottom plugging device and the plugging method aim to solve the problems of poor hole bottom plugging quality, high manual labor intensity, need of consuming a large number of particle fillers and the like in the vertical deep hole multi-charging blasting ore breaking process in the existing VCR method. The plugging device comprises a rigid plug, a fixing pin and an elastic element; the fixing pin is installed in a hollow cavity of the rigid plug in a hinged mode; the fixing pin is obliquely arranged downwards and outwards in the hollow cavity; a penetrating hole corresponding to the fixing pin is formed in the side wall of the hollow cavity; the elastic element is connected between the tail end of the fixing pin and the rigid plug; an ejector rod driving the fixing pin to rotate around a hinge shaft is further arranged at the bottom of the rigid plug; a swing arm driving the ejector rod to