High-stress roadway combined ring beam supporting structure and construction method thereof

Abstract

The invention discloses a high-stress roadway combined ring beam supporting structure and a construction method thereof, and belongs to the technical field of roadway construction supporting. The supporting structure comprises a roadway and a supporting ring. The homogeneous and isotropous supporting ring is constructed around the roadway, anti-pull anchor rods and slip casting anchor rods of different layers are relatively evenly arranged in surrounding rock, a relatively even steel wire rope net with main rope bodies of steel wire ropes as ribs and a multi-layer tough concrete gunite layer structure passing through a highly dense rock face are pressed below an anchor rod pressing disc of each layer, pressure stabilizing and pressure retaining gunite is applied to evenly gluing disperse and scattered surrounding rock, and the overall mechanical property is relatively even and is greatly improved. The cask effect of supporting is avoided, the overall bearing capacity of the surroundingrock is improved, the anchor rod combination number in unit rock bodies of the surrounding rock is increased, the manner singly depending on the strength of the rock is changed, the strength of the supporting ring is improved, and in combination with gluing of the gunite on the surrounding rock, the mechanical property of the surrounding rock is improved.

Description

Technical field [0001] The invention relates to the technical field of roadway construction support, in particular to a high-stress roadway composite ring beam support structure and a construction method thereof. Background technique [0002] With the expansion of coal mining scope, the mining depth continues to increase, and mining conditions are becoming more and more difficult, especially the superimposed pressure on roadway support caused by the expansion of weak rock and coal under large buried depth, complex structure and mining stress. It is a problem that plagues coal mine roadway support. Because these pressures have differences in the speed of time, the magnitude and direction of the force, they are a combination of unequal time and uneven superimposed pressure. Roadway support will be repeatedly damaged under the action of this uneven superimposed pressure. The roadway is affected by the combined action of the horizontal and vertical stresses from the rock mass. The ...

AI Technical Summary

Problems solved by technology

The roadway is jointly affected by the horizontal stress and vertical stress from the rock mass, and the bottom plate and the two sides often bulge seriously, and even lead to the overall collapse of the roadway, which seriously affects the safe production of the coal mine

[0003] For roadways in complex and high-stress areas, there are objective factors that the support is difficult to stabilize. Whether it is development or repair roadway support, anchor-mesh cable-spray support is used. The support method is subjectively unsuitable for complex and high-stress soft rock roadways. sex

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