Construction method of roadway surrounding rock fiber grout grouting reinforcement

Abstract

The invention discloses a construction method for grouting reinforcement of surrounding rock fiber slurry of a roadway. The grouted slurry is fiber slurry, and the fiber slurry is grouting-reinforced by the construction method comprises the steps of drilling holes in the surrounding rock; positioning separating pipes after hole drilling; detonating explosives which are positioned on the inner walls of the separating pipes in advance; positioning anchoring rods in the separating pipes; respectively sleeving the anchoring rods and the separating pipes with slurry stopping plugs to form a double-ring slurry stopping plug; mounting a tray; screwing a nut; grouting the fiber slurry for the first time; connecting grouting pipes with the separation pipes to enable the fiber slurry to penetrate into the surrounding rock through the separation pipes; grouting for the second time; connecting the grouting pipes with the anchoring rods to enable portland cement and sodium silicate slurry to be grouted through the anchoring rods. With the adoption of the construction method, the anchoring rods can act with high performance under a high stress state; the integrity of the anchoring rods, the slurry, the fibers and the surrounding rock can be improved, and the four parts can coordinate to act, so as to completely improve the property of the surrounding rocks, and as a result, the stability of the whole surrounding rock can be ensured.

Description

technical field [0001] The invention relates to a rock soil reinforcement construction method in the construction of high-stress multi-crack roadways in underground projects such as mine engineering and tunnel engineering, in particular to a construction method for fiber grouting reinforcement of roadway surrounding rocks. Background technique [0002] In mining engineering, tunnel engineering and other underground projects, as the surrounding rock is exposed during roadway excavation, the in-situ stress begins to release gradually, and the primary cracks in the rock expand to produce secondary cracks, which greatly threatens the safety and stability of the roadway. At this time, it is necessary to take effective measures to strengthen the surrounding rock of the roadway, control its deformation, stabilize its force, ensure the stability of the surrounding rock, and adopt effective support methods to improve the strength of the surrounding rock itself and ensure the coordinat...

AI Technical Summary

Problems solved by technology

[0003] In terms of roadway support, the use of traditional active support such as bolts can play a role of suspension and compression to a certain extent, but it still cannot fundamentally change the nature of the surrounding rock itself, and especially in broken, soft In the rock roadway, the anchoring force of the bolt cannot reach the design value, and thus cannot maximize its effect, which increases the difficulty of roadway support

At present, most of the grouting methods and construction methods use traditional grouting for grouting. Traditional grouting and grouting methods are limited in improving the strength of surrounding rock itself, especially the shear and tensile strength of cracks. Without substantial improvement, it poses a huge threat to the efficient and safe production of underground engineering

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