Method for preventing hitch of hydraulic support from being filled by crushed gangue

A technology of hydraulic supports and column nests, which is applied in mine roof supports, earth square drilling, mining equipment, etc., which can solve problems such as complex internal dimensions, affecting the movement of column 1, and obstruction of lifting frames, so as to achieve high construction efficiency and shorten the replacement of columns the effect of time

Inactive Publication Date: 2009-09-09
蒋飞鸿
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The column socket 3 of the bracket is an open design. The internal size of the column socket is relatively complicated. At the same time, a large amount of coal dust and coal chips often fall into the well when working underground, and then it is compacted by the moving column 1. After a long time, it is compacted. Coal chips etc. become very hard, seriously affecting the movement of the column 1, causing obstacles to the lifting frame, and in severe cases, the column cannot move normally
In addition, especially when maintaining and replacing the column 1, the compacted coal dust and coal chips in the column socket 3 are very difficult to handle, which seriously affects the maintenance time
There is currently no good solution to this problem

Method used

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  • Method for preventing hitch of hydraulic support from being filled by crushed gangue

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Embodiment Construction

[0007] The polyurethane foam filling principle of the present invention is that the polymerization reaction of polyether isocyanate can generate urethane, that is, the required polyurethane can be generated, that is, polyurethane foam. Add catalyst (such as dibutyltin dilaurate or triethylenediamine or triethanolamine), crosslinking agent (such as ethylenediamine polyether), blowing agent (such as R-113 or R-11 and water) ), foam stabilizers (such as silicone oil), can adjust the tensile strength P and tensile elongation at break δ of foamed plastics to meet the process requirements.

[0008] Such as figure 1 As shown, in the present invention, the modified polyurethane material is directly sprayed into the column socket 3 of the hydraulic support through high pressure, and foamed to have a certain tensile strength P and tensile elongation at break δ Filler, so as to seal the column socket 3. Tensile strength and elongation can be achieved by changing the components of the m...

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Abstract

The invention discloses a method for preventing hydraulic support column sockets from being filled with coal gangue gravel. The method is as follows: the modified polyurethane material is constructed on-site, and directly injected into the column sockets of hydraulic support through high pressure, and then foamed and formed It is a filler with a certain tensile strength and elongation, so as to seal the column socket. In the present invention, the modified polyurethane material is directly injected under high pressure on site, so that the surface of the foam filler is a whole without joints, and it has proper elasticity, which can not only prevent coal dust, coal gangue gravel, etc. from falling into the column nest, Moreover, it does not hinder the movement of the bracket in the column socket. In addition, the invention not only has high construction efficiency and is easy to meet the quality requirements, but also has a self-removal device, which greatly shortens the time for underground emergency repair and replacement of columns.

Description

technical field [0001] The invention relates to a sealing method for a column socket of an underground hydraulic support in a coal mine. Background technique [0002] Such as figure 1 As shown, the hydraulic support is a support mechanism used in coal mines. The hydraulic support column 1 is installed in the column socket 3 of the base 4 through the pin shaft 2 . The column socket 3 of the bracket is an open design. The internal size of the column socket is relatively complicated. At the same time, a large amount of coal dust and coal chips often fall into the well when working underground, and then it is compacted by the moving column 1. After a long time, it is compacted. Coal chips and the like become very hard, seriously affecting the movement of the column 1, causing obstacles to the lifting frame, and in severe cases, the column cannot move normally. Especially when maintaining and replacing the column 1 in addition, the compacted coal dust and coal chips in the col...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D23/03
Inventor 蒋飞鸿
Owner 蒋飞鸿
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