Improved soft rock roadway integral tunneling protection support

Abstract

The invention relates to an improved soft rock roadway integral tunneling protection support and belongs to the field of mining machinery manufacturing and application. The improved soft rock roadway integral tunneling protection support mainly consists of a semi-circular protective arch, left and right hydraulic supporting columns (1) and a support base. The semi-circular protective arch consists of two groups of arc-shaped supporting arch slabs which are symmetric, located on the left side and the right side and connected at the highest point of the arch through hinges (7), and each group of arc-shaped supporting arch slabs include an arc-shaped connecting arch slab (8) and an arc-shaped bearing plate (9). The upper ends of the left and right hydraulic supporting columns (1) are respectively connected with a supporting connection lug (10) on the corresponding-side arc-shaped bearing plate (9). The improved soft rock roadway integral tunneling protection support has the advantages of being capable of simultaneously bearing pressure through the periphery, high in compressive strength, large in bearing force, convenient to operate and tight in part combination. With respect to roadway construction convenience, structure innovation and the like, the safety, the adaptability, the technical advancement and the economical efficiency of the soft rock supporting projects are integrally improved through design optimization.

Description

Technical field [0001] The invention relates to a safety support device for mine roadways, in particular to an improved soft rock roadway integral excavation and protection support suitable for mining areas where various soft rock roadways are subjected to ground pressure or surrounding rock pressure; its structure It is compact, easy to disassemble, and is especially convenient for installation in shafts and roadways. Background technique [0002] In recent years, with modern comprehensive mechanized mine mining, the mining depth has continued to increase, and the geological conditions have become more and more complex. Not only the in-situ stress of the deep rock formations in the mines has also increased, especially the soft rock of the coal mine roadway is deformed, the surrounding rock is easily damaged, and the surrounding rock is Excessive relaxation under pressure can easily lead to instability. Excessive plastic deformation or loosening damage occurs under the action of ...

AI Technical Summary

Problems solved by technology

This technical scheme can be compressed at the same time on all sides, but because the arc length of the semicircular arch is the sum of the arc length of an arc top guard plate and the arc lengths of the arc support arch plates on the left and right sides. The arc length is fixed; therefore, the adjustment to adapt to the height of different soft rock roadways can only rely on the up and down length of the chute holes on the side guard plates of the two wings of the semicircle arch; When the jacking reaches the maximum limit of the chute hole on the side guard plate, the overall excavation and protection support of the entire soft rock roadway will not rise any more, which means that the technical solution is limited in adapting to different soft rock roadways

Looking at the technical solution from another aspect, in order to solve the problem of convenient roadway installation and transportation, the semicircular guard arch is designed as an arc-shaped top guard plate and the symmetrical arc-shaped support arch plates on the left and right sides are connected by four connecting ears or loose leaves. It is equivalent to the existence of two degrees of freedom nodes in the semicircular arch; the sliding pins on the two wings of the semicircular arch and the chute holes form another two degree of freedom nodes; the stability of the support itself with four degrees of freedom nodes sex is unreliable

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