Hydraulic pallet for mine constant-resistance type anchor rod (cable)

Abstract

The invention provides a hydraulic pallet for a mine constant-resistance type anchor rod (cable). The hydraulic pallet comprises a hydraulic outer cylinder and a piston rod, the hydraulic outer cylinder is an inverted U-shaped barrel, an anchor rod guide sleeve is arranged at the center of the hydraulic outer cylinder, the piston rod is a hollow rod, a dust prevention ring is arranged at the lowerend of the hydraulic outer cylinder, the piston rod and the hydraulic outer cylinder and the anchor rod guide sleeve and the dust prevention ring are sealed, and a safe unloading valve communicatingwith a hydraulic system and a high-pressure oil cavity is arranged on the piston rod. Compared with the prior art, according to the preferred scheme, a hydraulic yielding assembly composed of the hydraulic outer cylinder, the anchor rod guide sleeve, the piston rod, a hydraulic one-way valve and the safe unloading valve is fixed to a top plate through an anchor rod (cable) in the anchor rod guidesleeve, when top plate local territorial anchor rod (cable) tensile force exceeds pressure set by the safe unloading valve, hydraulic oil overflows and is unloaded through the safe unloading valve, the piston rod retracts and yields, and constant anchoring force of the anchor rod (cable) is kept.

Description

technical field [0001] The invention relates to an underground space roadway support device, in particular to a device capable of preventing accidents such as end breakage and middle part breakage of some anchor rods and anchor cables due to large elastoplastic deformation of the roadway rock mass during the roadway support and monitoring process. Intelligent hydraulic pallets for mining constant resistance bolts and cables. Background technique [0002] As we all know, the anchor (cable) support in the roadway support method is based on the maintenance and utilization of the self-supporting capacity of the surrounding rock, and controls the deformation and relaxation of the surrounding rock, making the surrounding rock a fixed part of the support system. With the continuous increase of coal mine mining depth, the stress concentration phenomenon of roadway surrounding rock mass is becoming more and more serious. The support and reinforcement of the traditional prestressed sy...

AI Technical Summary

Problems solved by technology

To solve this problem, a new type of support structure or material with constant resistance and large deformation is needed, which can resist large deformation damage of surrounding rock through large deformation of the structure or material, but considering the strong rigidity of the anchor (cable) material, from the perspective of the material itself Difficult to get a constant anchoring force

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