A kind of bolt-shot reticulated shell support system for coal mine roadway

Abstract

The invention discloses an anchor shotcrete reticulated shell support system for a coal mine roadway, comprising a steel reticulated shell bracket supported in the coal mine roadway and a plurality of bolts connected between the reinforced reticulated shell bracket and the rock wall of the coal mine roadway The reinforced mesh shell bracket includes two top mesh shells at the top, two bottom mesh shells at the bottom, and two side mesh shells; the two top mesh shells are connected to each other and are in an inverted U shape. , the two bottom net shells are connected to each other and form a downwardly concave arc, and the two top net shells, the two bottom net shells and the two side net shells are integrally closed. ring. The invention not only has simple processing technology, convenient and quick underground construction, and can improve installation work efficiency, but also is a supporting structure with excellent performance, high supporting force and low cost, which is beneficial to give full play to the self-bearing capacity of the surrounding rock and strengthen the supporting structure. The three-way load-carrying capacity of the structure.

Description

technical field [0001] The invention relates to the field of supporting structures, in particular to a bolt-spraying reticulated shell supporting system for coal mine roadways. Background technique [0002] At present, with the gradual reduction or even exhaustion of shallow coal resources, the depth of underground mining is getting larger and larger, and many mines at home and abroad have entered the state of deep mining one after another. Many mines will face severe deep mining problems. [0003] Deep mining has high in-situ stress and complex geological structure. The back end of roadway excavation is under pressure, and the disturbance range is proportional to the original rock stress. Therefore, the end of the deep rock roadway has a large range of pressure and disturbance. Within its disturbance range, due to the high stress of the surrounding rock of the roadway, the surrounding rock quickly undergoes large deformation, cracking, fragmentation and overall instability...

AI Technical Summary

Problems solved by technology

Within the disturbance range, due to the high stress of the surrounding rock of the roadway, the surrounding rock quickly undergoes large deformation-cracking-cracking-integral instability from the surface to the inside, resulting in a series of complex problems such as severe deformation of the roadway and damage to the supporting structure. , which not only increases the maintenance cost, but also brings great safety hazards to coal mine production

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