Hydraulic support double-cavity stand column jack structure and energy absorption impact resistance constant resistance method thereof

Abstract

The invention relates to the technical field of rock burst prevention and control, and particularly relates to a hydraulic support double-cavity stand column jack structure and an energy absorption impact resistance constant resistance method thereof. A movable column of the hydraulic support double-cavity stand column jack structure is inserted into a cavity of an outer cylinder, and the lower end of the movable column divides the cavity into an upper cavity and a lower cavity; a piston is arranged in the lower cavity, and the piston divides the lower cavity into a liquid storage cavity and a buffer cavity; the liquid storage cavity is located on the side close to the movable column; and the buffer cavity is located on the lower portion of the piston, an elastic component abutting against the piston is arranged in the buffer cavity, the elastic component can maintain the stability of the liquid storage cavity in a normal state, when the elastic component bears impact loads, the elastic component can be compressed, and after the impact loads are released, the elastic component can reset. When the stand column jack bears the impact loads, the stand column jack can be instantly released, and the problem that an existing safety valve cannot instantly release pressure, and consequently a support is damaged is solved; after the impact loads are released, the stand column jack can recover the support supporting strength, constant resistance supporting of a top plate is achieved, and the safety of the top plate is improved.

Description

technical field [0001] The invention relates to the field of rock burst prevention and control, in particular to a double-cavity column jack structure of a hydraulic support and an energy-absorbing, impact-resistant, and constant-resistance method thereof. Background technique [0002] In the prior art, the unit type advanced hydraulic support has become the standard advanced support form of rock burst mines, and the support strength, stability and impact resistance have made great progress compared with other support forms. At present, the unloading and pressure-relieving functions of all supports are realized through the opening and releasing of the safety valve on the hydraulic system of the column, and it takes a certain time from the opening of the safety valve to the release of the liquid. When rock burst occurs, the huge impact load is transmitted to the safety valve instantly through the support. Since the safety valve cannot release the liquid and pressure instantly...

AI Technical Summary

Problems solved by technology

[0006] The first object of the present invention is to provide a hydraulic support double-chamber column jack structure, which can solve the problems of low strength, poor safety, complex process and low reusability existing in the prior art;

Images