Anchor cable for cage-shaped mine and preparation method thereof

Abstract

The invention discloses an anchor cable for a cage-shaped mine and a preparation method thereof. The method comprises the following steps: clamping a steel stranded wire in the jig of a workbench, using a special cage weaving machine to rotate the steel stranded wire in the reverse direction of twist to scatter the steel stranded wire, then filling filler in the scattered steel stranded wire, using the cage weaving machine to rotate the steel stranded wire in the direction of twist to form a cage-shaped expansion joint on the steel stranded wire, and finally pressing and binding the two ends of the steel stranded wire to form the anchor cable for the cage-shaped mine. Under the action of the expansion joint of the invention, the resin anchoring agent can be fully and evenly stirred and combined with the bore wall firmly, the anchoring force is increased by 20% compared with that of the common anchor cable for the mine; by using the anchor cable for the cage-shaped mine, the anchor cable can be centered and straightened in a bore and not incline to the bore wall, thus increasing the anchoring force of the anchor cable; and the end of the cementing segment of the anchor cable for the cage-shaped mine is fixed by a snap ring, thus the end of the anchor cable can not be scattered.

Description

technical field [0001] The invention relates to an anchor cable for mine support. Background technique [0002] With the popularization and development of anchor cable support technology in China, the application range of mine anchor cables is becoming wider and wider, and it is applied to the reinforcement of shafts and surrounding rocks in coal mines or other mines. Mine anchor cables are steel strands intercepted according to the anchoring depth. The anchor cables are anchored in the borehole and the surrounding rock is anchored on the hard roof. At the same time, due to the high strength of the steel strands, it can provide relatively The large prestressing force connects the composite roof at the lower part of the surrounding rock to form a unified rigid roof, which has a better supporting effect. However, since the steel strand is equal in diameter, the diameter is far smaller than the diameter of the borehole, and the anchoring force with the borehole wall is insuffi...

AI Technical Summary

Problems solved by technology

However, since the steel strands are equal in diameter, the diameter is much smaller than the diameter of the drilled hole, and the anchoring force with the drilled hole wall is insufficient after being anchored with the resin anchoring agent.

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