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Reinforcing method for loose coal pillar body corrosion-resistant interchange roadway

An anti-corrosion, roadway technology, applied in tunnels, earth-moving drilling, tunnel lining and other directions, can solve the problems of protecting the integrity of the coal column from structural damage, short duration of reinforcement effect, failure of anchor bolt and cable support, etc. The effect of avoiding support failure, reducing environmental protection investment and delaying corrosion time

Inactive Publication Date: 2021-07-20
SHANDONG XINJULONG ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned support and reinforcement technology also has the following disadvantages: the duration of the reinforcement effect is relatively short, and because the reserved protective coal pillar is small and loose, it is corroded and infiltrated by the accumulated water in the upper roadway, and the overall structure of the protected coal pillar is affected. Destruction, resulting in the failure of anchor rod and anchor cable support

Method used

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  • Reinforcing method for loose coal pillar body corrosion-resistant interchange roadway

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Embodiment 1

[0022] see figure 1 , a method for reinforcing a loose coal pillar anti-corrosion interchange roadway, comprising the following steps:

[0023] S1. Construction of the lower roadway 3: set up the I-shaped steel beam support 4 on the roof of the lower roadway 3, use three anchor cables 5 for hoisting, and the distance between the eye positions of the anchor cables 5 is 1800mm, and use the I-shaped steel shed at the same time 6 to lift the I-beam support 4, and the length of the anchor cable 5 on the I-beam support 4 of the lower roadway 3 is greater than the thickness of the coal pillar 2 to be protected;

[0024] S2, spray grout on the roof of the lower roadway 3;

[0025] S3. Construction upper roadway 1: When passing through the overpass area, install I-shaped steel beam support 4 on the exposed anchor cable 5, and use iron drainage pipe 7 to replace the cement ditch, and at the same time support the I-shaped steel beam 4 Lay waterproof material on the upper part and pour ...

Embodiment 2

[0032] Embodiment two differs from embodiment one in that:

[0033] In this embodiment, the waterproof material also includes P.O32.5R composite Portland cement, gangue and pebbles produced from mines.

[0034] The upper roadway 1 is poured by using the gangue produced in the mine instead of the medium-coarse river sand and used with cement. The gangue produced in the underground will not go up the shaft, but will be reused directly in the underground, reducing the processing cost of the gangue in the enterprise after it goes up the shaft. At the same time, the ground environment of the mine is improved, reducing the company's additional investment in environmental protection.

[0035] Others are the same as embodiment one.

[0036] Embodiment 1 and Embodiment 2 are mainly used for support when the mine roadway is buried deep below 800m and exceeds 9m when passing overpasses.

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Abstract

The invention discloses a reinforcing method for a loose coal pillar body anti-corrosion interchange roadway. The method comprises the following steps of arranging an I-shaped steel beam support on a top plate of a lower roadway, hoisting by using three anchor cables, and lifting the I-shaped steel beam support by using an I-shaped steel shed at the same time, wherein the length of the portion, positioned on the I-shaped steel beam support of the lower roadway, of each anchor cable is greater than the thickness of a coal pillar to be protected; spouting on the top plate of the lower roadway; and constructing an upper roadway, specifically, when passing through an interchange area, installing an I-shaped steel beam support on an exposed portion of each anchor cable, using an iron drainage pipe to replace a cement ditch, laying a waterproof material on the upper part of the I-shaped steel beam support, and pouring. The method is suitable for supporting when an extra-thick coal seam mine roadway which is deeply buried 800 m or more below the underground and exceeds 9 m passes through an interchange; and two sides of a coal pillar body are protected through the upper and lower roadways, and meanwhile, through pouring, closure and the like, the upper portion effectively prevents waste water on a working face from flowing into a coal pillar, so that the stability and the integrity of the coal pillar body are effectively ensured.

Description

technical field [0001] The invention relates to the technical field of overpass roadway reinforcement, in particular to a reinforcement method for an overpass roadway with anti-corrosion loose coal pillars. Background technique [0002] At present, most of the overpass support reinforcement measures known in the industry adopt reinforcement measures such as laying I-shaped steel beams in the lower roadway, using I-shaped steel scaffolding, and spraying grout. Use I-shaped steel beam support: In the lower part of the excavated roadway, that is, within the range of the excavated roadway affected by the upper roadway, I-shaped steel beams are erected perpendicular to the direction of the roadway. Each I-shaped steel beam uses three φ22mm high-strength anchor cables to ensure Anchor cables are anchored in the protective coal pillars to reinforce the protective coal pillars; use I-shaped steel sheds and shotcrete support: 11# I-beams are used, the length of shed beams is 5000mm, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D17/01E21D20/00E21D11/15E21D11/10E21F16/00E21D11/38
CPCE21D11/00E21D17/01E21D20/00E21D11/15E21D11/10E21F16/00E21D11/38
Inventor 高伟民周建刘小龙张斌郑瑞良甄逢俊司佩田
Owner SHANDONG XINJULONG ENERGY
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