Shaftless spiral sheet type expansion inhibiting pipe and use method thereof

Abstract

The invention relates to a shaftless spiral sheet type expansion inhibiting pipe and a use method thereof. The shaftless helical sheet type expansion inhibiting pipe comprises a hollow steel pipe, a hollow resin cartridge, a shaftless helical sheet and a rubber plug at the end of the hollow steel pipe. The shaftless helical sheet type expansion inhibiting pipe is matched with a roadway anchor rodor an anchor cable for use, and when the shaftless helical sheet type expansion inhibiting pipe is used, a variable-diameter anchor rod drilling hole is constructed in roadway surrounding rock, wherein one section of a small diameter is positioned in the deep complete stable rock mass of the roadway surrounding rock, and one section of a large diameter is positioned in the rock mass of the loose circle range of the shallow part of the roadway surrounding rock. When the anchor rod is installed, the shaftless helical sheet type expansion inhibiting pipe is installed on a large-diameter section of the anchor rod drilling hole, the surrounding rock of the loose ring, the shaftless spiral sheet and the hollow pipe are bonded into a whole through the resin cartridge, the loose ring of the surrounding rock is limited to continue to be loosened through the constraint of the rigid body of the hollow pipe, further the expansion-inhibiting effect is achieved on the broken ring, and the broken expansion and deformation of the surface of a roadway are reduced.

Description

technical field [0001] The invention relates to the field of roadway crushing and surrounding rock reinforcement, in particular to a shaftless helical sheet type expansion suppressing pipe and a method for using the same. Background technique [0002] Under the influence of bearing pressure, the mine roadway produces plastic circle, crack circle and broken circle in the surrounding rock on the surface of the roadway. The damage degree of the rock mass becomes larger and larger from the inside to the outside, and the bearing capacity becomes smaller and smaller. The outer rock mass will lose its resistance to the outward expansion of the inner rock mass, resulting in plastic circle, crack circle and broken circle. The rock swells and deforms uncontrollably. Excessive bulging deformation will cause the local surrounding rock to break away from the support of the parent rock formation, resulting in accidents such as gangway, roof fall or bottom slump. At present, the anchor r...

AI Technical Summary

Problems solved by technology

However, the uneven bulging force will amplify some unpredictable bending, torsion, and shearing additional forces through the leverage of the pallet, causing damage to the anchor rod and anchor cable in the form of pulling, bending, or shearing. Once the anchor rod, anchor cable If the supporting body breaks, the supporting body will fail. Therefore, it is very important to suppress the breaking and swelling of the surrounding rock in the roadway supporting system

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