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System for preventing spontaneous combustion by pouring loess consolidation agent into goaf and grouting method thereof

A consolidating agent, goaf technology, applied in soil protection, infrastructure engineering, construction, etc., to achieve the effect of good impermeability, low viscosity and strong injectability

Inactive Publication Date: 2019-01-04
DATONG COAL MINE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of effectively curbing the "breathing" phenomenon of the goaf and preventing gas overflow in the gob during mining, the present invention provides a system and a grouting method for pouring loess consolidation agent into the goaf to prevent spontaneous combustion

Method used

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  • System for preventing spontaneous combustion by pouring loess consolidation agent into goaf and grouting method thereof
  • System for preventing spontaneous combustion by pouring loess consolidation agent into goaf and grouting method thereof
  • System for preventing spontaneous combustion by pouring loess consolidation agent into goaf and grouting method thereof

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with specific examples.

[0027] A goaf pouring loess consolidation agent to prevent spontaneous combustion system, such as Figure 1 to Figure 4 As shown, it includes multiple sets of boreholes, each set of boreholes runs through the coal pillar, each set of boreholes includes a high-level grouting hole 6 and a low-level grouting hole 7, and the angle between the high-level grouting hole 6 and the horizontal plane is greater than The angle between the low-level grouting hole 7 and the horizontal plane, the high-level grouting hole 6 and the low-level grouting hole 7 are all equipped with a drilling casing 9, and the drilling casing 9 extends out of the coal pillar and into the goaf The ends in the zone 1 are flower tubes 8, the distance between each group of boreholes is 9-10 meters, and cement slurry 10 is poured between the borehole casing 9 and the boreholes, and the borehole casing 9 is located in...

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Abstract

The invention discloses a system for preventing spontaneous combustion by pouring a loess consolidation agent into a goaf and a grouting method thereof, and relates to the field of preventing the spontaneous combustion of coal left in the goaf under coal mine. The system comprises multiple groups of drill holes, wherein each group of drill holes penetrate a coal pillar and comprise a high-positiongrouting hole and a low-position grouting hole; the included angle between the high-position grouting hole and the low-position grouting hole is greater than the included angle between the low-position grouting hole and a horizontal plane; drill hole casing pipes are arranged in the high-position grouting hole and the low-position grouting hole; the end parts, extending out of the coal pillar andstretching into the goaf, of the drill hole casing pipes are floral tubes; the distance between each group of drill holes is 9-10 meters; cement paste is poured between the drill hole casing pipes and the drill holes; the drill hole casing pipes are located in the other end part of the interior of a second tunnel and are connected to a grouting pump through high-pressure rubber hoses; valves andtwo-way valves are arranged on the high-pressure rubber hoses; and the grouting pump is connected to an excitant container and a liquid mixed material container through the high-pressure rubber hoses.The system has the effects of covering the coal left in the goaf, isolating air and suppressing the "breathing" phenomenon of the goaf.

Description

technical field [0001] The invention relates to the field of preventing spontaneous combustion of leftover coal in goafs under coal mines, in particular to a system and grouting method for preventing spontaneous combustion by filling loess consolidation agents in goafs, and is suitable for anti-spontaneous combustion applications in goafs in various coal mines . Background technique [0002] Tashan Coal Mine is the first super-large modern mine built by Datong Coal Mine Group Corporation for the development of Carboniferous Permian coal seams in Datong Coalfield. The 3-5# coal seam of the Carboniferous Permian system currently mined in the mine has a buried depth of 300-500m, an average coal seam thickness of 15m, stable occurrence, and the spontaneous combustion tendency of the coal seam is spontaneous combustion. The 8206 working face started production on December 5, 2009, and the mining was completed and closed in August 2010. Since the working face was closed, the goa...

Claims

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Application Information

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IPC IPC(8): E02D3/12E02D15/04
CPCE02D3/12E02D15/04
Inventor 张兴刘平高建伟李志霞乔永
Owner DATONG COAL MINE GRP
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