Method for controlling floor heave through inverted arch anchoring beam

Abstract

The invention discloses a method for controlling a floor heave through an inverted arch anchoring beam. The method comprises the following steps of: constructing a grouting pipe, an anchor cable or a high-strength anchor rod and other prestressed anchorage systems on an inverted arch of a constructed tunnel, forming a bottom beam and an anchoring beam coupled through the prestressed anchoring function, cooperatively exerting the active and passive supporting functions, and fulfilling the aim of controlling the bottom plate for a long time. In addition, longitudinal reinforcing ribs are connected between the inverted arch beams, and concrete is poured, so that the whole control system can exert greater supporting functions. The floor heave can be effectively controlled in a developing entry with high dynamic pressure or a developing tunnel with long service time and heading engineering, and the application prospect is wide.

Description

technical field

[0001] The invention relates to a method for controlling a floor drum by an anti-bottom arch anchor beam, and is especially suitable for the stability control of surrounding rocks or bottom plates of chambers in coal mines, metal mines, subways, civil air defense projects and underground space projects. Background technique

[0002] The swelling of the floor of the roadway or chamber is a common problem encountered in coal mines, metal mines, subways, civil air defense projects and underground space projects. In particular, due to the influence of mining pressure during coal mining or secondary superimposed stress during roadway digging, the convergence deformation around the roadway or chamber is serious, and the bulge of the floor reaches more than half of the approaching amount of the roof and floor, or even reaches 90%. Roadways or chambers need to be repaired every 2 to 3 months, and the amount of repair work even exceeds the amount of newly excavated ro...

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