Deforming energy-absorbing anchor ring and anchor rod supporting method for preventing anchor rod from being broken and catapulted

Abstract

The invention discloses a deforming energy-absorbing anchor ring and an anchor rod supporting method for preventing an anchor rod from being broken and catapulted, and is particularly suitable for soft rock large-deformation roadways or sections needing energy-absorbing yielding supporting. The anchor rod penetrates through the anchor ring with opposite holes, pressure is applied to rock mass through a tray and a nut, and deformation is prevented. When the stress of the anchor rod is increased, the anchor ring deforms in the direction opposite to the holes, and thus the energy-absorbing effectis achieved. The deformation amplitude of the anchor ring can be observed by utilizing fluorescent bands oppositely arranged on the outer side of the anchor ring, so that the stress of the anchor rodis pre-judged, and a warning effect on sudden breakage of a potential part is achieved. When the deformation of the anchor ring is too large or the fluorescence range is too large, anti-ejection ironwires penetrate through two penetrating holes which are formed in the tail portion of the anchor rod in a crossed mode and screwed and fixed on an iron wire net. If the anchor rod is broken at any key position, the two anti-ejection iron wires which are arranged in the crossed mode can prevent the anchor rod from being catapulted into the space of the roadway, and people are prevented from beinginjured. The deforming energy-absorbing anchor ring is simple in structure, convenient to operate, low in economic cost, safe, reliable and good in effect.

Description

technical field [0001] The invention relates to a bolt support method, in particular to a deformed energy-absorbing anchor ring suitable for soft rock large-deformation roadways or sections requiring pressure-absorbing and pressure-absorbing support to protect the safety of miners and to prevent bolt breakage and ejection. Anchor support method. Background technique [0002] Bolt support technology plays an extremely important role in the field of coal mine support in my country, and has obvious economic and technical benefits, so it is widely popularized and applied. In recent years, with the increase of coal mining depth, many mines can encounter large deformation roadways in soft rock or roadways with impact tendencies such as rockbursts. Such roadways have high original rock stress and complex stress disturbances, and most roadways have to withstand a Or multiple mining disturbances. At present, most projects tend to use intensive support, extended support, super suppo...

AI Technical Summary

Problems solved by technology

Some coal mines use the method of "capping" or "wrapping iron wire" on the tail of the bolt to prevent potential fracture ejection, which is blind and unpredictable

If all bolting systems are adopted in this way, some bolting systems will not actually eject in the end during the normal service of the roadway, which will cause long operation time and slow down the excavation speed.

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