Strong roof support pier column and method for protecting section coal pillar

A technology of roof support and piers, which is applied in the direction of pillars/brackets, earthwork drilling, mining equipment, etc., can solve the problems of difficult construction of the roof support body on the side of the coal pillar, poor pressure performance, unsafe recovery, etc. , to achieve the effect of short construction time, simple construction and low labor intensity

Active Publication Date: 2015-11-04
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of strong roof supporting pier columns and a method for protecting section coal pillars, which can solve the problems of d

Method used

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  • Strong roof support pier column and method for protecting section coal pillar
  • Strong roof support pier column and method for protecting section coal pillar
  • Strong roof support pier column and method for protecting section coal pillar

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Embodiment Construction

[0028] The strong roof supporting pier column is composed of pier column forming structure, suspenders, fixed hooks, square wood and bag filling materials; there are injection ports on the upper outer wall of the construction bag; the top of the inner bag 1 is provided with 6 circles with a diameter of 3 cm The vent hole 11 is used for venting the air inside the bag when filling with concrete; 4 steel fixed hooks 7 are arranged at equal intervals on the top of the outer bag 2 and the fixed hooks 7 are connected to the outer bag through a height-adjustable sling 8. Before filling, the construction belt is hung under the reinforced mesh of the roof; there is an injection port 9 on the outer wall of the upper part of the construction bag. The injection port is cylindrical with a diameter of 0.2m.

[0029] The pier column forming structure, namely the construction bag, includes: an inner bag, an outer bag, a base bag, a cast iron base, and a circular steel hoop to increase the strengt...

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Abstract

The invention discloses a strong roof support pier column and a method for protecting a section coal pillar, and belongs to an underground coal mine roof support method. The strong roof support pier column is of a cylindrical structure and is composed of a pier column molding structure comprising an inner bag, an outer bag, a base bag, a cast iron base, circular steel hoops for increasing the pier column strength, construction bag hanging and fixing hooks, heightening hanging belts, square timber on the upper portion of a construction bag and filling materials in the bag. A filling port is formed in the outer wall of the upper portion of the construction bag. The filling materials are concrete added with an accelerating agent and an expanding agent. The invention further provides a constructing method of the strong roof support pier column. The strong roof support pier column is pushed forwards along with a working face when used for section coal pillar protection, and the strong roof support pier column is constructed behind a working face support. The strong roof support pier column has the advantages of being simple in structure, high in support strength, capable of providing active support force, good in yielding performance, convenient to construct, free of recycle and the like, is particularly suitable for protecting the section coal pillar on the goaf side, and can also be used for roof support in other areas of a coal mine.

Description

Technical field [0001] The invention relates to a roof support method for underground coal mines, in particular to a strong roof support pier pillar and a method for protecting section coal pillars. Background technique [0002] Setting coal pillars between two adjacent mining roadways is the most basic and most widely used method to protect the stability of the mining roadways during the mining period. Due to the complexity of coal seam burial and mining conditions, unreasonable selection of section coal pillar size is often encountered in mining practice. Compared with the problem of large coal pillars in the section causing waste of coal resources, the small coal pillars in the section will cause more serious problems, causing serious deformation and damage to the mining roadways, affecting production arrangements, and even causing casualties. [0003] In the case of serious deformation and damage of the mining roadway caused by the small coal pillar size in the section, bolts,...

Claims

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Application Information

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IPC IPC(8): E21D15/02
Inventor 白庆升屠世浩
Owner CHINA UNIV OF MINING & TECH
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