Avoidance buffering energy-absorbing anti-impact anchor rod

Abstract

The invention discloses an avoidance buffering energy-absorbing anti-impact anchor rod. The anchor rod includes a rod body, a tray, a constant resistance device and a nut; the right end of the rod body is provided with an external thread block, an external block is arranged on the external thread block, the external thread block and the rod body adopt integrated manufacture, the center of the trayis provided with a rod body installation hole, the rod body passes through the installation hole formed at the center of the tray, and the right end of the external thread block is provided with thenut; the constant resistance device is arranged between the tray and the nut and has a thin-wall circular tube structure, the middle of the constant resistance device is penetrated, and the rod body is sleeved with the constant resistance device. The nut includes a circular truncated cone block, a circular ring block and a square block, and the left side of the circular truncated cone block is inserted into an inner hole of the constant resistance device. The avoidance buffering energy-absorbing anti-impact anchor rod can adapt to the destroying characteristic that surrounding rock rapidly deforms in the impacting process, release and conversion of impact energy can be effectively guided and controlled, high energy is consumed in the avoidance buffering process, the influence of impact dynamic load can be effectively avoided, and the stability of the surrounding rock and a support system in a tunnel is ensured.

Description

technical field [0001] The invention relates to the field of rock burst roadway support in coal mines, in particular to a buffering, energy-absorbing, anti-shock anchor rod. Background technique [0002] Rock burst is one of the major dynamic disasters encountered in coal mining. In recent years, studies have found that rock bursts in coal mine roadways in my country play a dominant role in coal mine rock burst accidents, accounting for about 81% of the total number of rock burst accidents. With the continuous improvement and innovation of roadway support technology and the continuous development of the theoretical level of anchorage, the application technology level of prestressed anchorage technology for roadway bolt or anchor cable support is also continuously improved. Now it is widely used in tunnels, buildings, mines, etc. Many underground engineering fields. However, most of the current traditional roadway support bolts are not designed from the perspective of anti-...

AI Technical Summary

Problems solved by technology

However, at present, most of the traditional roadway support bolts are not designed from the perspective of anti-shock, and the anti-shock load capacity is limited, which cannot meet the requirements of rock burst mine roadway support.

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