Retractable trapezoid support with cushion blocks

Abstract

The invention provides a retractable trapezoid support with cushion blocks. The retractable trapezoid support consists of a top beam and two combined stand columns, wherein each of the combined stand columns is formed by fastening a column head, a column body and a longitudinal retractable body which is arranged between the column head and the column body by bolts which pass through screw holes of the column head and the column body through a clamping plate on which a strip groove is formed; two ends of the top beam are in curved surface connection with the combined stand columns through sliding cushion blocks; and a transverse retractable body is arranged between the top beam and each sliding cushion block. The retractable trapezoid support has high bidirectional contractibility and can adapt to the change of ground pressure of a laneway better. Through the retractable trapezoid support, a fabricated reinforced concrete trapezoid support which is out of use due to lack of high contractibility can be used again, the support effect of an I-shaped steel support can be further improved, the using amount of the I-shaped steel support can be reduced, the quality of the laneway support can be improved, the support cost can be reduced, steel consumption can be reduced, wood is not needed, and ecological environment preservation, energy conservation and emission reduction are facilitated.

Description

technical field [0001] The invention belongs to the technical field of mine roadway support, in particular to a pad-loaded retractable trapezoidal support. Background technique [0002] The trapezoidal support used for mine roadway support, also known as shed support, consists of a top beam and two columns. The materials used mainly include wood, reinforced concrete and I-beam. It is the roadway support technology with the longest history and the largest number of use for human beings to mine underground minerals. The connection method between the top beam and the column of the existing support and the acquisition of the shrinkable performance of the support, the wood support is generally connected by the mouth, and its shrinkage depends on the compression of the component itself; the reinforced concrete support is connected by the mouth or the square, which can be The shrinkage system relies on the method of setting compressible wooden blocks at the connection between the...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the prefabricated reinforced concrete trapezoidal bracket is forced to stop using due to the shrinkability of the trapezoidal bracket mentioned above, and the problem that the I-steel trapezoidal bracket for mining cannot better exert the supporting effect , to provide a cushion-type retractable trapezoidal support that can not only improve the quality of roadway support and reduce the cost of roadway support, but also use less steel and no wood, which is conducive to ecological environment protection, energy saving and emission reduction

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