Straight corrugated pipe expanding type energy absorption device

Abstract

The invention discloses a straight corrugated pipe expanding type energy absorption device. The straight corrugated pipe expanding type energy absorption device comprises an anchor rod and an anchor rod backing plate arranged perpendicular with the anchor rod, wherein an energy absorption component is arranged between the compressed end of the anchor rod and the anchor rod backing plate; the energy absorption component comprises a pressure head which is in contact with the anchor rod backing plate and is connected with the anchor rod in a sleeving mode, an expanding male die which is sleeved at the compressed end of the anchor rod in a sleeving mode, and a straight corrugated pipe which can generate expanding energy absorption between the pressure head and the expanding male die; and whenthe anchor rod is subjected to a large impact load, the straight corrugated pipe absorbs dissipation energy under the pressure of the expanding male die through corrugated expansion and expanding deformation of the straight corrugated pipe, and the impact energy is converted into expanding plastic deformation energy. The straight corrugated pipe expanding type energy absorption device is constantin working resistance, good in energy absorption effect and high in stroke utilization rate, the corrugated expansion and expanding deformation of the straight corrugated pipe are utilized to absorb and dissipate impact energy, and the impact resistance of the anchor rod and an anchor cable is further improved.

Description

technical field [0001] The invention belongs to the technical field of anti-scour support for coal mine roadways, and in particular relates to a linear tube expanding diameter energy-absorbing device. Background technique [0002] Rock burst is a kind of instantaneous, sudden and destructive mining dynamic disaster. The impact load generated when the rock burst occurs has a rapid impact on the anchor bolt and anchor cable. If the rock burst is pressed too fast, the anchor bolt fixed in the coal rock body will be stretched and deformed, but different anchor bolts can only pass through The plastic deformation of the rod body absorbs energy, the absorbed energy is small, and it is prone to fracture and damage, which will cause the anchor cable network support device to fail, cause the roadway to collapse, and cause a major accident. Therefore, the improvement of the impact resistance of the anchor rod needs to be solved urgently. Energy-absorbing components are added to the su...

AI Technical Summary

Problems solved by technology

The energy-absorbing components used in bolt and cable support in the mining industry mainly include circular tube-type energy-absorbing components with expanding diameters. Although they can ensure constant resistance during the deformation process, the radial plastic deformation of the energy-absorbing components is relatively small, so Deformation absorbs relatively little energy

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