Hydraulic support for filling behind support

The utility model discloses a hydraulic support for filling behind the support. The hydraulic support comprises a two- or four-column shield-type hydraulic support body. The rear end of a top beam of the hydraulic support is additionally equipped with a rear telescopic beam, which is connected with the top beam via a chute and is stretched back and forth via a translation jack. Four front/rear baffle plates are arranged below the rear telescopic beam and are divided into a left part and a right part. Each part is composed of an upper baffle plate and a lower baffle plate, wherein the lower baffle plate is expanded and contracted vertically via a vertical moving jack. he left and right parts of a baffle surface and a shield-beam side protective plate of the hydraulic support are simultaneously stretched out and drawn back via a pushing jack, so as to realize sealing between adjacent supports. The hydraulic support of the utility model realizes sealing of a gob area and adjacent supports, and causes no grout ru