Underground cavity stability monitoring cable sleeve waterproof treatment structure and drainage plate

The utility model discloses an underground cavern stability monitoring cable sleeve waterproof treatment structure and a drainage plate, comprising a cable sleeve and a drainage plate which are arranged in a cavern wall rock structure, the drainage plate comprises polygonal bosses arranged on the drainage plate in an array and prefabricated circular indentation grooves arranged between any polygonal bosses, a circular gasket is arranged in the prefabricated circular indentation groove, a cross-shaped opening is formed in the circle center of the circular gasket, a rubber waterproof sleeve is arranged at the position of the circular gasket, waterstop sealing rings are arranged in the two ends of the rubber waterproof sleeve, and the waterstop sealing rings are used for limiting and fixing the cable sleeve. The prefabricated circular indentation groove is formed in the drainage plate, so that the situation that opening treatment is conducted on the drainage plate manually at will, and consequently unnecessary d