Energy-consumption assembly type flange reinforced concrete support for roadway supporting

Abstract

The invention belongs to the field of roadway supporting, and discloses an energy-dissipation assembly type flange reinforced concrete support for roadway supporting. The support is composed of energy consumption connectors and arc-shaped flange steel-concrete components. Each energy consumption connector is composed of a steel casing pipe, a metal folded-edge pipe and a hard rubber pressure-bearing body, each arc-shaped flange steel-concrete component is formed by welding an upper steel pipe concrete component and lower T-shaped steel, and each steel pipe concrete component is characterized in that a round seamless steel pipe is filled with concrete and is tightly attached to the wall of a roadway. During construction, firstly, multiple sections of arc-shaped flange steel-concrete components are sequentially connected into a whole with the same section shape as the roadway through the energy consumption connectors, then the concrete is injected into grouting openings of the round seamless steel pipes in all sections of arc-shaped flange steel-concrete components, and the whole support is formed after the concrete is compacted. By means of energy-dissipation assembly type flange reinforced concrete support, the energy consumption is achieved through the combined action of plastic deformation of the metal folded-edge pipes and elastic deformation of the hard rubber pressure-bearing bodies at the ends, the overall bending resistance of the support is remarkably improved through the T-shaped steel, and the integrity and stability of the support are improved.

Description

technical field [0001] The invention belongs to the technical field of roadway support and is used for reducing the bending deformation of the support and improving the bearing capacity of the support, and relates to a support method for deep high-stress and rockburst roadways and large-deformation roadways. Background technique [0002] As coal mining gradually enters the deep, various problems follow, especially the problems caused by deep high stress and rock burst. On the one hand, more than 90% of the rock burst accidents in coal mines occur in the roadway. When the deformation of the deep high-stress roadway is not released for a long time, geological disasters such as rock burst and rockburst are prone to occur, that is, the accumulation of The energy is released instantaneously, causing damage and deformation of the roadway, damage to mining and support equipment, and casualties; on the other hand, when the roadway undergoes large deformation, the original support is...

AI Technical Summary

Problems solved by technology

However, due to the joint action of multiple steel pipes and concrete, it is difficult to control the compression deformation process, and it is impossible to ensure sufficient compression space, so the compression effect is not obvious enough.

When the peak pressure of the roadway is too large, the welded support will rigidly contact the surrounding rock, and the pressure of the surrounding rock on the support will increase instantly, and brittle failure will easily occur, which poses a certain safety hazard

Moreover, the continuous progressive yielding compressible device and its use method disclosed in the invention did not significantly improve the bending stiffness and bending bearing capacity of the support.

[0007] According to the new Austrian method and the principle of coupling support, when the initial load of the support is too large, the support must have the function of yielding deformation; although the above-mentioned yielding energy-consuming support has the function of yielding, the process of allowing deformation is not possible. Controlled or unpredictable, and shear displacement may occur at the joints of steel tube concrete members, which will cause the overall instability of the support

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