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Large-mining-height rib-spalling-preventing coal anchoring and roof grouting device and use method thereof

A technology with large mining height and sidewalls, which is applied in mining equipment, earthwork drilling, installation of bolts, etc., and can solve problems such as roof fall of the sidewalls and threats to personal safety

Active Publication Date: 2021-01-29
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the high-mining coal mining face with complex geological conditions, roof collapses frequently occur, which seriously threatens the personal safety of coal miners during coal mining operations, especially when coal miners carry out coal mining operations head-on. unimaginable consequences

Method used

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  • Large-mining-height rib-spalling-preventing coal anchoring and roof grouting device and use method thereof
  • Large-mining-height rib-spalling-preventing coal anchoring and roof grouting device and use method thereof
  • Large-mining-height rib-spalling-preventing coal anchoring and roof grouting device and use method thereof

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Experimental program
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Embodiment 1

[0036] According to specific embodiments of the present invention, such as figure 1 and image 3 As shown, the present invention provides a kind of anchor coal roof injection device for large mining height and anti-slab side.

[0037] The anchor coal top injection device 10 includes a grouting pipe 1, a bag 2 and a blasting structure. Grouting pipe 1 is the passage of grouting liquid; Grouting pipe 1 is a flexible pipe, optional plastic pipe during concrete implementation, the material of plastic pipe is nylon or aluminum-plastic, and the diameter scope of plastic pipe is 18-22mm (can choose 18mm , 19mm, 20mm, 21mm, 22mm), the thickness of the plastic pipe is 2-4mm (2mm, 3mm, 4mm can be selected). The pipe made of plastic makes the grouting pipe 1 flexible and can be rolled up. The bladder 2 is arranged on the periphery of the grouting pipe 1, and the position corresponding to the bladder 2 on the grouting tube 1 is provided with a first grout outlet 3, and the grouting liq...

Embodiment 2

[0048] According to specific embodiments of the present invention, such as figure 2 As shown, the present invention provides a second embodiment of an anchor coal roof injection device with a large mining height and anti-slab side. The difference between this embodiment 2 and embodiment 1 is only the blasting structure; in embodiment 2, the blasting structure Including the blasting plug 7, the blasting plug 7 is blocked at the port position of the grouting pipe 1, and when the grouting pressure reaches the set value, the grouting liquid will rush the blasting plug 7 out of the grouting pipe 1; The depth that the plug 7 extends into the grouting pipe 1 is used to adjust the pressure setting value; that is, the deeper the blasting plug 7 is inserted into the grouting pipe 1, the greater the pressure required to push the blasting plug 7 out . The blasting plug 7 is directly set to block the port position of the grouting pipe 1, the structure is simple, and the installation and ...

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Abstract

The invention provides a large-mining-height rib-spalling-preventing coal anchoring and roof grouting device and a use method thereof. The coal anchoring and roof grouting device comprises a groutingpipe, bags and a blasting structure. The grouting pipe is a grouting liquid channel; the bags are arranged on the periphery of the grouting pipe; first grout outlets are formed in the positions, corresponding to the bags, of the grouting pipe; grouting liquid in the grouting pipe flows into the bags from the grout outlets; the grouting liquid in the bags flows out of the bags from small holes; andthe blasting structure is arranged at the end part of the grouting pipe and used for being opened to allow the grouting liquid to pass when the grouting pressure reaches a set value. A small amount of the grouting liquid is diffused to a hole sealing section through the small holes to fragmentize a coal body, and the fragmentized coal body is cemented, so that the anchoring effect is achieved; when the pressure of the grouting liquid reaches a certain value, the blasting structure is opened, and the grouting liquid with a certain pressure is injected into the cementing position of the coal body and a roof and diffuses towards the broken roof along the cementing surface, so that the effect of directionally reinforcing the broken roof and the coal wall is achieved; and therefore, the occurrence of a rib spalling accident is prevented.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to an anchor coal roof injection device for large mining height and anti-slab side and a method for using the same. Background technique [0002] After the coal seam is mined, there is a suspension in the roof strata of the goaf, and its pressure is transferred to the coal wall, and the pressure on the coal wall increases, forming a pressurized area, and a part of the coal is crushed under the action of the additional load on the coal wall , and squeezed to the goaf, this phenomenon is called the slice gang. In the high-mining coal mining face with complex geological conditions, roof collapses frequently occur, which seriously threatens the personal safety of coal miners during coal mining operations, especially when coal miners carry out coal mining operations head-on. The consequences are disastrous. [0003] Therefore, it is necessary to provide an improved tech...

Claims

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Application Information

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IPC IPC(8): E21D20/02E21D21/00
CPCE21D20/02E21D21/0006E21D21/0026E21D21/0093
Inventor 王成孙玉宁神文龙
Owner HENAN POLYTECHNIC UNIV
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