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

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

Inactive Publication Date: 2007-07-25
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

[0008] 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), foaming agent (such as R-113 or R-11 and water) ), foam stabilizer (such as silicone oil), can adjust the tensile strength P and tensile elongation at break δ of foamed plastics to meet the process requirements.

[0009] As shown in Fig. 1, the present invention is specifically that the modified polyurethane material is constructed on-site, directly sprayed into the column socket 3 of the hydraulic support through high pressure, and foamed to have a certain tensile strength P and a tensile breaking elongation. Filler with a length δ, so as to seal the column socket 3. Tensile strength and elongation can b...

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Abstract

The present invention discloses a method for preventing hydraulic support column channel from being filled with broken coal gangue. Said method is characterized by that it utilizes a modified polyurethane material to make in-place construction, utilizes high pressure to directly inject said modified polyurethane material into the column channel of hydraulic support, and utilizes a foaming-forming process to obtain a filling material with a certain tensile strength and extensibility and utilizes the filling material to seal the column channel.

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] As shown in Figure 1, the hydraulic support is a supporting mechanism used in underground 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 nest 3 of the bracket is an open design, and the internal dimensions of the column nest are 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, and it is compacted after a long time. 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 co...

Claims

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Application Information

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IPC IPC(8): E21D23/03
Inventor 蒋飞鸿
Owner 蒋飞鸿
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