Assembled FRP high-water-material mining combined pillar and construction method

Abstract

The invention discloses an assembled FRP high-water-material mining combined pillar and a construction method. The assembled FRP high-water-material mining combined pillar comprises prefabricated FRP pipes, fastening devices and internal filling bodies. The FRP pipes with different heights and thicknesses are prefabricated in advance according to the actual height of an underground roadway, the FRP pipes are connected through the rigid semicircular fastening devices or the rubber buckle type rectangular fastening devices or mining flame-retardant adhesive tape, and then the FRP pipes are filled with high-water materials or gangue to form an integral supporting structure. The assembled FRP high-water-material mining combined pillar and the construction method have the beneficial effects that the reciprocating operation mode is carried out in the pouring process, the pillar adapts to the height of the roadway to the largest extent by erecting wood boards at the connecting positions of all the FRP pipes, and the supporting system integrates the dual advantages of FRP and the high-water materials, is high in resistance increasing speed, high in system reliability, simple in construction process and low in production cost and has good application prospects.

Description

technical field [0001] The invention relates to an underground geotechnical engineering support system, in particular to a new assembled FRP-high water material combined system, which is used in underground geotechnical engineering and mine tunnel support technology. The support system has the advantages of high structural reliability, convenient construction, effective construction time saving, etc., has good engineering application prospects, and belongs to the technical field of underground geotechnical engineering, especially mine underground engineering support. Background technique [0002] The stability of underground geotechnical engineering, especially mine underground geotechnical engineering support structure is not only related to the safety and stability of underground engineering, but also directly affects the relative stability of ground building structures. Relevant scientific research institutes at home and abroad have carried out a lot of research on underg...

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Problems solved by technology

However, under high external loads and dynamic disturbances, CFST is prone to buckling deformation and then causes structural instability, and the concrete needs a certain curing time before it can really bear the load. This is different from the high bearing capacity of underground geotechnical engineering. The basic requirements such as large deformation capacity and high early strength do not match

In addition, the relatively high production cost, transportation cost and personnel cost of CFST pillars restrict its wide-scale promotion to a certain extent.

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