Method for entry retaining for walling at sides of road in steel cylinder support mode

A pillar-type, steel-cylinder technology, applied in pillars/supports, earth-moving drilling, filling, etc., can solve problems such as restricting the application and development of gob-side entry retention technology, affecting the efficient production of working faces, and gas leakage in goaf areas. , to achieve the effect of strong operability and adaptability, saving materials and reducing labor intensity

Inactive Publication Date: 2010-11-24
CHINA UNIV OF MINING & TECH
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Problems solved by technology

The latter two are widely used, but there are disadvantages such as complex operation procedures, high labor intensity, and slow wall-building speed on site, which affect the efficient production of the working face
The block stacking method not only wastes man-hours, but also easily causes gas leakage in the goaf due to insufficient support strength or insufficient stacking
The existence of many problems limits the application and development of gobside entry retention technology to a certain extent

Method used

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  • Method for entry retaining for walling at sides of road in steel cylinder support mode
  • Method for entry retaining for walling at sides of road in steel cylinder support mode
  • Method for entry retaining for walling at sides of road in steel cylinder support mode

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Embodiment Construction

[0022] After the steel cylinder pillar 4 is installed, concrete can be poured into the bucket, and the concrete should be filled to contact the roof. The entire process from the installation of the steel cylinder pillar to the pouring of concrete must be completed within 5m behind the working face, that is, after the steel cylinder pillar is installed The distance s of the lagging working face is not greater than 5m; with the continuous advancement of the working face, the next steel cylinder pillar 4 is arranged at a distance l in sequence, and concrete is poured until the concrete is connected to the top. The distance l between the steel cylinder pillars 4 is about 1.6m~2.0m,;

[0023] Finally, after the goaf has been collapsed and enriched, the gangue wall 6 is piled up with crushed gangue or cinder between the steel cylinder pillars 4 at intervals, and the wall surface of the gangue wall 6 near the goaf side is sprayed with grout. The slurry can completely seal the gaps of...

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Abstract

The invention relates to a method for entry retaining for walling at sides of a road in a steel cylinder support mode, which is applicable to the construction of gob-side entry retaining for a coal mine stope. The method comprises the steps of: after stopping a coal face, arranging a steel cylinder support at the edge of a gob by lagging 1-2m, and arranging a steel grid frame structure in the steel cylinder; then, pouring concrete in the steel cylinder; firmly piling the edge of the gob with waste rocks, coal cinder and the like after an overhead plate of the god collapses; spraying slurry to close the gob; and jointly forming a support wall at the sides of the road with the high-strength steel cylinder support and a waste rock wall. The restriction of the high-strength steel cylinder can obviously enhance the strength and the carrying capacity of the concrete structure. The method has the advantages of simple construction process and high adaptability, and also can save materials, reduce labor intensity and improve the construction environment.

Description

technical field [0001] The invention relates to a method for building a wall next to a steel cylinder pillar type roadway and retaining a roadway, which is especially suitable for the gob-side roadway retention project of a coal mine mining face. Background technique [0002] The technology of coal pillar-free gobside entry retention is aimed at changing the ventilation mode of the coal mining face, transforming the traditional "U"-shaped ventilation into a "Y"-shaped ventilation, and fundamentally solving the problem of gas accumulation in the upper corner of the mining face. The safety situation of gas mines has improved. In addition, the application of this technology can also realize gas drainage in close-distance coal seams, which has the advantages of improving coal recovery rate and alleviating the tension of mining replacement. Affected by the violent movement of the roof of the coal seam after mining, it is difficult to implement the roadway retention. One of the k...

Claims

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Application Information

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IPC IPC(8): E21F15/00E21D15/02
Inventor 张农韩昌良李桂臣王成
Owner CHINA UNIV OF MINING & TECH
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