Quickly mounted efficient energy-absorbing mining anchor rod

Abstract

The invention discloses a quickly mounted efficient energy-absorbing mining anchor rod which comprises an expansion shell, a rod head, a rod body, a tray, an anti-seismic buffering material, a nut and a rod tail, wherein a tooth-shaped bulge is arranged on the outer surface of the expansion shell; matched threads are respectively arranged on the inner surface of the expansion shell and the outer surface of the rod head; a tapered bulge is arranged in the expansion shell; a tapered groove is arranged at the top of the rod head; a vertex angle of the tapered bulge is more than the vertex angle of the tapered groove; the thread is arranged on the rod tail; and the tray and the anti-seismic buffering material are respectively sleeved on the rod tail and are positioned and pre-tensioned by the nut. According to the invention, quick loading is realized by the anchor rod; mounting process is simplified; mounting time is shortened; driving speed is increased; the anti-seismic buffering material has a compressing buffering function when rock is burst, so as to effectively resist the dynamic loading effect at rock bursting moment; a certain anchoring force is kept by the anchor rod; and the anchor rod is prevented from being broken and invalid. Besides, the quickly mounted efficient energy-absorbing mining anchor rod has the beneficial effects of simple structure, convenience in mounting, high operability, and the like, and is widely applied to underground supporting for deep well.

Description

technical field [0001] The invention relates to a quick-installation and high-efficiency energy-absorbing mine bolt. Background technique [0002] Rockburst is a common dynamic failure phenomenon in the construction process of deep underground projects. When the high elastic strain energy accumulated in the rock mass is greater than the energy consumed by rock destruction, the balance of the rock mass structure is destroyed, and the excess energy causes the rock to burst. , so that rock fragments are stripped and collapsed from the rock mass. Rockburst often causes severe damage to the excavation face, equipment damage and casualties, and has become a worldwide problem in the field of rock underground engineering and rock mechanics. Slight rockbursts only peel off rock slices without ejection. Severe earthquakes can be measured to a magnitude of 4.6, and generally last for several days or months. The reason for rockburst is that there is high ground stress in the rock mas...

AI Technical Summary

Problems solved by technology

The traditional end-fixed anchor rod is composed of an anchor section, a rod body and an outer anchor section. The anchor section is anchored with an anchoring agent, which has the disadvantage of time-consuming solidification. The outer anchor section is directly fixed by a tray and only has a certain anchoring force, which cannot be used in deep high-stress environments. Effective control of the rock mass, high ground stress in the rock mass is likely to cause failure of the support system

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