Roadway surrounding rock closed protection method

Abstract

The invention discloses a roadway surrounding rock closed protection method. Before the integrity of roadway surrounding rock is not damaged, thin-layer spraying slurry is sprayed to the roadway exposed surrounding rock, and the thin-layer spraying slurry forms a continuous and compact closed layer on the surface of the roadway exposed surrounding rock, wherein the thickness of the closed layer is 15-20mm, and the thin-layer spraying slurry is prepared by mixing an environment-friendly rib-free high-performance thin-layer spraying material and water. The thin-layer spraying slurry adopts wet spraying, can permeate into gaps in the surface of the surrounding rock body and effectively adhere to the gaps in the surface of the surrounding rock, the overall self-stability of the surrounding rock can be restored through high adhesive force, and the situation that continuous weathering or instability of the deep surrounding rock is affected when gradual convergence deformation is caused by dynamic pressure changes of the surrounding rock is avoided; the thin-layer spraying slurry has good thixotropy and can easily permeate into the gaps or fractures in the surface of the roadway surrounding rock under the action of the spraying process, and then solidification is conducted quickly; and the overall continuity of the surface of the surrounding rock is restored, and initial deformation of the surrounding rock is effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of roadway support, in particular to a method for sealing and protecting roadway surrounding rock. Background technique [0002] Shotcrete is often used for protection of tunnel or coal mine underground roadway exposed surrounding rock closure to prevent coal seam cracking, internal coal oxidation and leakage of toxic and harmful gases in the coal seam to the roadway, and improve the airtightness, durability and overall integrity of the surrounding rock of the coal seam To prevent the supporting body from rusting and destabilizing due to the action of underground water vapor and corrosive gases, resulting in support failure and safety accidents caused by oxidation and weathering of surrounding rocks. [0003] At present, the protection of traditional sprayed concrete materials has disadvantages such as poor compactness, poor bonding, high brittleness, easy cracking and peeling, large dust pollution, high spr...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a roadway surrounding rock sealing protection method to solve the existing surrounding rock sealing protection problems such as poor compactness, poor bonding, high brittleness, easy cracking and spalling, and spraying. Technical issues with high rebound

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