Mining telescopic energy adsorption anti-impact viscous damping anchor rod and supporting method thereof

Abstract

The invention discloses a mining telescopic energy adsorption anti-impact viscous damping anchor rod and a supporting method thereof. The mining telescopic energy adsorption anti-impact viscous damping anchor rod is formed by a pre-tightening nut, a tray, energy adsorption materials, an anchor rod body, a base plate and an avoidance buffering energy adsorbing device. The anchor rod body is composed of an anchor rod end and an anchor rod body, and the pre-tightening nut, the tray, the energy adsorbing materials and the base plate are arranged on the anchor rod end. The avoidance buttering energy adsorbing device is formed by arranging a lower sliding piston, a connecting rod piston and an upper sliding piston in a buffer hydraulic cylinder in sequence, wherein the lower sidling piston, the connecting rod piston and the upper sliding piston are respectively provided with 3-4 damping holes, the damping holes of adjacent pistons are not on the identical straight line, sealing rings are arranged on the circumferential face of the upper sliding piston and the circumferential face of the lower sliding piston, and the connecting rod of the connecting rod piston penetrates through the upper sliding piston and the upper face of the buffer hydraulic cylinder and then is connected with the anchor body together. The mining telescopic energy adsorption anti-impact viscous damping anchor rod can maintain constant resistance in the process of resisting rock burst, can retard impact loads, reduce the damage to the surrounding rock in the anchoring range of the anchor rod by the impact energy, and perform the function of further stabilization to the roof surrounding rock.

Description

technical field [0001] The invention relates to the technical field of coal mine safety support, in particular to a retractable energy-absorbing and anti-shock hydraulic damping bolt for mines and a support method thereof. technical background [0002] After the coal mining enters the deep part, under the joint action of the advanced bearing pressure and the original stress of the working face, dynamic disaster accidents such as rock burst are prone to occur in the mining roadway. At the moment when rock burst occurs, a large amount of elastic impact energy will be released in the form of waves, including both tensile impact energy and compression impact energy. The impact energy will make the surrounding rock of the mining roadway stretch and compress continuously, resulting in the deformation of the surrounding rock of the roadway, and even breaking the support system such as bolts and cables, causing the surrounding rock of the roadway to fall, causing serious casualties ...

AI Technical Summary

Problems solved by technology

The disadvantage of this design is the same as that of the above-mentioned patent. It belongs to a one-time buffer device, and the end of the anchor rod is anchored by a cylinder with an enlarged diameter.

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