FRP-steel-block coal gangue concrete combined supporting structure and construction method

A technology of coal gangue concrete and support structure, which is applied in earth square drilling, solid waste management, sustainable waste treatment, etc. It can solve the problems of insufficient strength and achieve the effect of increasing strength and delaying buckling

Pending Publication Date: 2022-05-31
XINJIANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] On the other hand, the ordinary concrete usually made of natural aggregates filled inside the CFST columns and CFST supports is not strong enough.

Method used

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  • FRP-steel-block coal gangue concrete combined supporting structure and construction method
  • FRP-steel-block coal gangue concrete combined supporting structure and construction method
  • FRP-steel-block coal gangue concrete combined supporting structure and construction method

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Embodiment Construction

[0035] The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be more clearly defined.

[0036] see attached Figure 1-5 As shown, a FRP-steel-block coal gangue concrete composite supporting structure of the present embodiment comprises a steel pipe 1, an FRP pipe 3 and a block coal gangue concrete 4, and the inner diameter of the steel pipe 1 is greater than the outer diameter of the FRP pipe 3. , the outer diameter of the FRP pipe 3 in this embodiment is 20 mm smaller than the inner diameter of the steel pipe 1, the top of the FRP pipe 3 protrudes from the steel pipe 1, the height of the FRP pipe 3 is 100 mm higher than the steel pipe 1, and the inside of the steel pipe 1 passes through the positioner 5 The FRP pipe 3 is fixed, and the outer side of the steel pipe 1 is welded w...

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Abstract

The invention discloses an FRP-steel-block coal gangue concrete combined supporting structure which comprises a steel pipe, an FRP pipe and block coal gangue concrete, the inner diameter of the steel pipe is larger than the outer diameter of the FRP pipe, the top of the FRP pipe extends out of the steel pipe, the FRP pipe is fixed in the steel pipe through a positioner, and the FRP pipe is fixedly connected with the steel pipe through the positioner. A cavity formed by the steel pipe and the FRP pipe is filled with the block coal gangue concrete, and a stiffening rib with the same length as the steel pipe is welded to the outer side of the steel pipe. According to the invention, the strength of the block coal gangue concrete is improved, the steel pipe welded with the stiffening ribs at the initial stage of pressure bearing mainly plays a role in restraining, and outward buckling of the steel pipe under the action of an external load is effectively delayed.

Description

technical field [0001] The invention relates to the technical field of underground mine roadway support, in particular to an FRP-steel-block coal gangue concrete composite support structure and a construction method. Background technique [0002] As the pillar industry of the national economy, the coal industry plays an important role in the process of my country's modernization construction. With the large-scale mining of shallow coal resources, more and more coal mines have entered the ranks of deep mining. Under the influence of "three highs and one disturbance", the large deformation of the surrounding rock of the roadway in the process of deep mining has become a key problem restricting the safe and efficient mining of modern mines. [0003] In order to achieve the continuous stability of the surrounding rock of the deep roadway, a variety of new composite supporting structures including CFST columns, CFST brackets, fiber reinforced composite material restrained concre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/14
CPCE21D11/105E21D11/107E21D11/14Y02W30/91
Inventor 赵红超曾俊杰刘洪林杭银建刘金虎王庆国李国栋赵小利黄海山
Owner XINJIANG UNIVERSITY
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