Inverted-arch interlocked girder and construction method thereof

Abstract

The invention provides an inverted-arch interlocked girder and a construction method thereof. The inverted-arch interlocked girder comprises a plurality of interlocked girder bodies and a plurality of inverted arch bodies. The plurality of the interlocked girder bodies are arranged in parallel, the plurality of the interlocked girder bodies and the plurality of the inverted arch bodies are in perpendicular lap connection and fixed through anchor rods and nuts, and the inverted arch bodies are disposed above the interlocked girder bodies. According to the inverted-arch interlocked girder and the construction method thereof, the interlocked girder bodies and the inverted arch bodies are in perpendicular lap connection and fastened through the anchor rods and the nuts, so that the support stability is guaranteed, the effective contact area between the inverted arch bodies and a base plate can be increased, the line contact is changed into net contact, the stress uniformity is increased, and base plate fractured rock is effectively prevented from projecting among support rows.

Description

technical field [0001] The invention relates to a U-shaped steel annular bracket supporting component and a construction method thereof for broken rock mass roadways, in particular to a bottom arch interlocking beam and a construction method thereof. Background technique [0002] With the mining trend of mine shifting from shallow to deep, the phenomenon of shaft passing through the goaf and the problems exposed have attracted people's attention day by day. When the roadway passes through the goaf, especially the caving zone, the surrounding rock is loose and broken, and under the action of high ground stress, the deformation of the surrounding rock, especially the floor heave, increases significantly. Usually, U-shaped steel ring brackets are used for full-section support. The U-shaped steel ring bracket has the advantages of full section closure, large bearing capacity, high stability under high confining pressure, and small deformation and damage of the bracket; especial...

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Problems solved by technology

[0003] However, since the contact area between the floor and the bottom arch is only within the range of the longitudinal section of the bottom arch, the contact surface is small and the stress is concentrated. For roadways that pass through the loose rock mass in the caving zone of the goaf, the pressure on the floor is large and the force is not strong. Even, it is easy to cause damage and failure of the bottom arch, and even the rock blocks of the bottom slab bulge out between the support rows, seriously affecting the normal operation of the roadway

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