A hole protection device for underground rock engineering test boreholes adapting to different hole diameters

Abstract

The invention belongs to the technical field of drilling equipment and discloses an underground rock engineering testing drill hole orifice protection device adapted to different hole diameters. The device comprises a corrugated plate outer cover, a wheel shaft, elastic inner steel pieces and traction steel cables; the corrugated plate outer cover is of a hollow barrel-shaped structure, and the barrel wall is of a corrugated plate structure; the elastic inner steel pieces are arranged along the cambered surface of the inner wall of the corrugated plate outer cover, and the cambered surface of each elastic inner steel piece is attached to the cambered surface of the inner wall of the corrugated plate outer cover; the head end of each elastic inner steel piece is fixed to the inner wall of the corrugated plate outer cover; the wheel shaft is arranged in a barrel cavity of the corrugated plate outer cover; the traction steel cables are wound on the wheel shaft, and the tail end of each traction steel cable is connected with the tail end of the corresponding elastic inner steel piece; piece bodies of the elastic inner steel pieces are fixed to the inner wall of the corrugated plate outer cover through clamping rings, and the elastic inner steel pieces are embedded in the clamping rings and can slide in the clamping rings; the tail ends of the elastic inner steel pieces are pulled and forced to slide in the clamping rings, and the corrugated plate outer cover is pulled to contract along the cambered surface, so that the barrel diameter of the corrugated plate outer cover is shrunk. The well hole protection device is efficient in hole protection.

Description

technical field [0001] The invention relates to the technical field of drilling equipment, in particular to an opening protection device for underground rock engineering test boreholes adapting to different apertures. Background technique [0002] With the advancement of my country's large-scale infrastructure construction and deep resource and energy mining, a series of underground rock engineering has emerged, such as traffic tunnels, underground hydropower plants, paint storage, mine roadways, etc. Reliable acquisition of the rock mass mechanical response during the excavation and operation of these projects is an important link to ensure the safety of the project and promote the smooth progress of the project. For this reason, it is necessary to construct a large number of drilling holes and implement multi-parameter analysis of rock mass deformation, fracture, stress, etc. test. There are generally two types of test drilling, one is the open hole, that is, the hole rem...

AI Technical Summary

Problems solved by technology

[0005] The invention provides an underground rock engineering test drilling hole protection device adapting to different apertures, which solves the problems in the prior art that the rock engineering test drilling protection operation is rough, the effect is poor, and the protection material is easily blocked by concrete spraying.

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