Energy-absorbing and anti-impact anchor cable and using method thereof

Abstract

The invention provides an energy-absorbing and anti-impact anchor cable and a using method thereof, which relate to the field of underground engineering safety support. The energy-absorbing and anti-impact anchor cable comprises a steel strand anchor cable, a binder storage box, an energy-absorbing and anti-impact device, an anchor cable lock and a pressure-bearing tray, wherein the energy-absorbing and anti-impact device comprises an outer sleeve, a bearing limiting base, an inner sleeve, a heat-insulating filling layer and an extrusion swell friction head; the binder storage box, the outer sleeve, the bearing limiting base, the inner sleeve, the extrusion swell friction head, the anchor cable lock and the pressure-bearing tray sequentially and coaxially sleeve the tail end of the steel strand anchor cable; the inner sleeve is located in an annular limiting groove on the tail end surface of the bearing limiting base; the heat-insulating filling layer is arranged between the outer sleeve and the inner sleeve; the extrusion swell friction head is restrained and fastened at the tail end through the anchor cable lock; and the tail end of the outer sleeve is connected with the head endof the pressure-bearing tray through thread. Overall yield and energy absorption of the anchor cable system can be realized, surrounding rock can be prevented from being deformed and damaged by impact, impact ground pressure can be effectively prevented and controlled, and the energy-absorbing and anti-impact anchor cable can be used in different working condition environments.

Description

technical field [0001] The invention relates to the technical field of underground engineering safety support, in particular to an energy-absorbing anti-scouring anchor cable and a method for using the same. Background technique [0002] With the continuous development of coal mine mining, rock bursts in roadways occur more and more frequently, and the instantaneous appearance of roadway rock bursts causes a large number of ordinary anchor rods / cables to suddenly be impacted by large deformations, resulting in overload breakage, impact pallet cracking, etc. , resulting in the instantaneous failure of the support, resulting in serious consequences such as a large number of casualties and equipment damage. In order to prevent the large deformation and instability of the impact dangerous roadway, various types of support components have been studied at home and abroad. [0003] The Chinese patent with the publication number CN103573279A discloses a mine-used retractable energy...

AI Technical Summary

Problems solved by technology

Although the above anchor cables have improved the pressure distribution of the inner anchor section during the operation stage, and solved the problems of excessive concentration of grouting body stress and uneven tension of the cable, they cannot maintain a constant bearing capacity after the cable is stressed and deformed, and Installation is more complicated

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