Energy absorbing anti-impact hydraulic support for fully-closed round roadway

Abstract

The invention relates to an energy absorbing anti-impact hydraulic support for a fully-closed round roadway. A slide way penetrating through a left bottom beam body and a right bottom beam body is arranged at the bottom of an integral bottom beam of a semilune structure, an energy absorbing block between the bottom beam bodies is arranged in the slide way, one end of a left hydraulic prop and one end of a right hydraulic prop are connected to the ends of the energy absorbing block between the bottom beam bodies through impact sliding blocks, and the other end of the left hydraulic prop and the other end of the right hydraulic prop are hinged to the lower end of a left side beam and the lower end of a right side beam respectively; an integral clamp plate of a V-shaped structure is arranged between the upper end of the left side beam and the upper end of the right side beam, and an energy absorbing block between the side beams is arranged in the integral clamp plate. The fully-closed round structure form which is more reasonable in stress and better in bearing effect is adopted in the hydraulic support, under quasi-static surrounding rock pressure, the integral hydraulic support is basically kept in a rigid support state, when rock burst occurs, impact kinetic energy of surrounding rocks of the roadway can be absorbed fast by means of damage deformation receding of the energy absorbing blocks, the impact effect on the whole support structure is buffered, the integral structure of the hydraulic support is protected from damage, and therefore the buckling failure of a roadway support system is prevented.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety support, and in particular relates to an energy-absorbing anti-scour hydraulic support for a fully enclosed circular roadway. Background technique [0002] With the continuous increase of coal mine mining depth in our country, the mining intensity has also increased, and the impact of rock burst problems on coal mine safety has become more and more important. The supporting body produces a violent impact, causing damage or even collapse of the supporting body. At the same time, the roadway will also have sidewalls, roof caving and bottom heaving, which will cause roadway blockage. [0003] Traditional roadway support has become more and more difficult to cope with rock burst. In order to resist rock burst, some coal mines use high-rigidity support system to resist rock burst by using the high strength of high-rigidity support system. , taking a portal-type roadway hydraulic support as an...

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Problems solved by technology

[0002] With the continuous increase of coal mine mining depth in our country, the mining intensity has also increased, and the impact of rock burst problems on coal mine safety has become more and more important. The supporting body produces a violent impact, causing damage or even collapse of the supporting body, and at the same time, the roadway will also have sidewalls, roof caving and bottom drums, etc., which will cause roadway blockage

[0003] Traditional roadway support has become more and more difficult to cope with rock burst. In order to resist rock burst, some coal mines use high-rigidity support system to resist rock burst by using the high strength of high-rigidity support system. , taking a portal-type roadway hydraulic support as an example, which provides initial support force and working resistance through two vertical hydraulic props to support the roof and bottom of the roadway. It can still resist the impact force. Once the ground impact pressure is large, the side walls of the two sides of the roadway will be restrained, which will force the hydraulic prop to bend inward, and even break in severe cases, which will cause serious deformation of the roadway, resulting in traffic obstruction and serious Affected the safe production of coal mines

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