Multiple layer double-fork type hyperstatic hydraulic support

Disclosed is a double-layer double-fork statically indeterminate hydraulic support which comprises a base, a top beam, a front beam, front beam jacks, hydraulic upright columns, a hydraulic control valve component and a pushing device; middle beams which construct the double-layer support are arranged between the top beam and the base; hydraulic upright columns or rigid upright columns arranged indouble-fork shape are arranged between the middle beams and the top beam; back plates or linkage plate mechanisms are arranged between the rear parts of the middle beams and the base; the front endsof the middle beams are hinged with the front beam; the lower parts of the middle beams are provided with front beam jacks used for driving the front beam to swing around the hinged shaft; intermediate boxes used for reinforcing the rigidity are arranged on the middle beams and the base; The double-layer double-fork statically indeterminate hydraulic support is applicable to the large mining height fully-mechanized face or the large mining height blasting face under the coal mines and has the advantages of simple structure, great supporting capacity, great support height, good stability, safeand reliable application and low cost.