Constant-strength high-convex-ladder-shaped coal mine underground deep supporting device

Abstract

The invention provides a constant-strength high-convex-ladder-shaped coal mine underground deep supporting device, which comprises a strip main steel band, wherein a boss is arranged in the middle of the strip main steel band; at least two strip grooves are formed on the back of the boss lengthwise; the two opening ends of the strip grooves are connected with the inner ends of a first plane and asecond plane respectively; the outer end of the first plane is crossed with the edge of the outer end, which extends outwards gradually, of a first inclined plane; the outer end of the second plane is crossed with the edge of the outer end, which gradually extends outwards, of a second inclined plane; a supporting solid body is arranged between each two strip grooves; the plane of the supporting solid bodies is in the same plane as the first plane and the second plane or lower than the first and second planes or higher than the first and second planes; the supporting solid bodies have a through hole; and the connecting parts of the supporting bodies and the strip grooves are in an arc shape. In the invention, the full length of a basic supporting part is rendered in a basically constant strength state, both common supporting and deep supporting avoid cracking, tearing and breaking, and thus, the safety problem of steel band in supporting is solved radically.

Description

technical field [0001] The invention relates to the underground support technology of coal mines, which is a support device for underground deep layers of coal mines with equal strength and high convex trapezoidal shape. Background technique [0002] Underground support in coal mines requires very high safety, and it is a difficult design to reduce production costs on the premise of achieving high safety. Because the reduction of production cost not only includes the application of saving materials, but also includes many aspects such as convenient construction and the difficulty of supporting parts going into the well. Therefore, the applicant has continuously studied the improvement of the downhole support parts since the 1990s, in order to achieve the best effect of the support. The support steel belt used in the underground support is relatively large, and has been widely used in this field after a breakthrough improvement since 1998. However, it is found in use that s...

AI Technical Summary

Problems solved by technology

Afterwards, the applicant carried out research and improvement in 2006. Although the effect is better, there are still deficiencies in deep support and when mining replaces steel roof beams and other facilities: cracks or tears still occur at some support sections and other phenomena

For this reason, those skilled in the art increase the thickness of the steel strip to achieve the purpose of increasing the strength in order to solve problems such as cracks or tears. However, experiments have shown that when the thickness of the steel strip increases, the unique elasticity and buffering properties of the raised structure of the steel strip Various indicators such as bearing capacity and tightness to the roof are reduced accordingly. Therefore, in recent years, this problem has not been completely resolved.

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