Depressurizing Hydraulic Support with Seperate Front and rear pillars and Control Method Thereof

The invention discloses a depressurizing hydraulic support with separate front and rear pillars and a control method thereof for correcting the inclination of the hydraulic support caused by a roof pressure during extraction at the working face, the hydraulic support comprises a top beam, a base, a caving shield, a tail beam, a front pillar and a rear pillar arranged between the top beam and the base, a front depressurizing valve arranged on the front pillar and a rear depressurizing valve arranged on the rear pillar, the front depressurizing valve and the rear depressurizing valve can conduct depressurization independently, so as to locally lower the front or rear part of the top beam and prevent inclination of the hydraulic support through automatic unloading of the front depressurizing valve or the rear depressurizing valve when uneven pressure is delivered from the roof. According to the hydraulic support of the invention, when uneven pressure is delivered from the roof, the depressurizing valve on the pillar subject to larger pressure can be timely opened for automatic depressurization, so as to locally lower the top beam, ensure balance of the support and prevent the inclination of the support.