A prestressing device for shed-type support

Abstract

The invention provides a shed type support prestress applying device which comprises a basic framework structure and an integrated hydraulic oil pump, wherein the basic framework structure specially comprises an upper framework structure and a lower leg type supporting structure, the upper framework structure is composed of a top steel frame, a bottom steel frame, a left steel frame, a right steel frame and corresponding multi-stage hydraulic oil cylinders, the lower leg type supporting structure is composed of four steel pipes, and the length of the leg type supporting structure can be changed by changing the stretching and retracting length of the steel pipes. The tail portions of all the multi-stage hydraulic oil cylinders in the basic framework structure are connected to the integrated hydraulic oil pump so that stretching and retracting of the hydraulic oil cylinders can be controlled, and then prepressing support of shed type supports in different sizes is achieved and the purpose of improving the supporting effect of the supports is realized. The device can prevent internal crack extension of rock mass and further expansion of the surrounding rock loose range and achieve active support of the shed type supports. Meanwhile, the labor intensity of workers can be greatly relieved during erection of the supports.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering and underground engineering support, and in particular relates to a prestressing device for a mining engineering support structure, in particular to a shed-type support prestressing device. Background technique [0002] As the main energy source in our country, coal occupies an important strategic position in the national economy. In the next few decades, the coal-based energy structure will be difficult to change. With the intensification of coal mining, shallow resources are gradually depleted, and coal development is accelerating to shift to deep and complex geological conditions. There have been roadways with high geostress in kilometers deep wells, roadways with extremely broken surrounding rocks, roadways with extremely large cross-sections, and roadways strongly affected by mining. And complex and difficult roadways such as retaining alleys along the gob. In view of the increas...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect of the passive support state of the existing shed-type support, and provide a shed-type support prestressing device. The advantages of effectively improving and greatly reducing the labor intensity of workers

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