Roller type sealing device and sealing method for goaf filling

The invention discloses a roller type sealing device and sealing method for goaf filling. The roller type sealing device comprises a columnar elastic cylinder and a supporting mechanism, wherein the cylinder comprises a middle filling cavity and end sealing bodies connected to the two ends of the filling cavity; the end sealing bodies form partition cavities through a plurality of crisscross elastic third partition plates; and the supporting mechanism is arranged above the cylinder and connected to a hydraulic support. Real-time sealing of a goaf can be achieved, the normal coal mining procedure is not disturbed, the mining speed is not affected, the requirements for grouting and waiting on cement setting time are low, the organization and management requirements are low, the parallel fully-mechanized coal mining face stoping and grouting filling replacement procedure can be achieved, the environmental problems of mine disasters such as gas, rock burst and water filling, surface collapse, water resource losse