Broken type soft rock roadway supporting device and method based on concrete filled steel tube support

Abstract

The invention discloses a broken type soft rock roadway supporting device and method based on a concrete filled steel tube support, and relates to the technical field of underground mines. The supporting method comprises the steps that firstly, a plurality of hollow grouting anchor rods are placed in surrounding rock of a roadway, and advanced grouting reinforcement supporting is carried out; then concrete is sprayed to the surrounding rock of the roadway to form a concrete layer, and broken rocks on the surface of the roadway form a whole through the concrete layer; then, an anti-bending early-strength concrete filled steel tube support structure is erected at a certain distance from a plastic plate; early-strength concrete is poured into the support, anti-bending steel bars are arranged on the outer side of the support in the circumferential direction of the roadway, and an anti-bending early-strength reinforced concrete arch body with a certain thickness is constructed between the plastic plate and the anti-bending steel bars; and finally, a plastic plate yielding layer is arranged between the roadway surrounding rock and the anti-bending early-strength reinforced concrete arch body. By combining the super-strong grouting reinforcement technology with the anti-bending concrete filled steel tube support structure, deformation of surrounding rocks can be effectively controlled, and the supporting effect is good.

Description

technical field [0001] The invention relates to the technical field of geology and mining, in particular to a support device and method for a broken soft rock roadway based on a steel pipe concrete support. Background technique [0002] As the mining of modern coal mines extends deeper, the geological conditions of mines become more and more complex. Soft rock is one of them, and the support problem of soft rock roadway has also been paid attention to. Studies have shown that due to the influence of factors such as the direction of the in-situ stress field, the occurrence of rock formations, the asymmetry of the rock mass structure, and the differential deformation of key parts, the deep soft rock roadway is asymmetrically deformed due to structural effects, making conventional symmetrical support uncontrollable. , leading to the weak self-supporting capacity of the roadway surrounding rock, the deformation speed and deformation amount of the roadway are very large, which h...

AI Technical Summary

Problems solved by technology

[0008] Although the above-mentioned prior art has done a lot of research on the support of soft rock roadway, its support effect still needs to be further improved, such as U-shaped steel shrinkable support, anchor shotcrete net support, with shrinkability or pressure relief device The fully enclosed support system and the composite support for key parts are the main methods for the soft rock broken dynamic pressure roadway support in coal mines

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