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Expressway underlie warehouse type inclined coal seam goaf comprehensive-treatment method

A highway and comprehensive treatment technology, applied in underground mining, surface mining, earth drilling and mining, etc., can solve the problem of lack of comprehensive and systematic comprehensive treatment methods in the goaf of the underlying storage-type inclined coal seam, and achieve the guarantee of grouting effect of effect

Inactive Publication Date: 2020-07-10
CHANGAN UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcoming of above-mentioned prior art, provide a kind of comprehensive management method of goaf of storage type inclined coal seam under expressway; Governance issues

Method used

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  • Expressway underlie warehouse type inclined coal seam goaf comprehensive-treatment method
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  • Expressway underlie warehouse type inclined coal seam goaf comprehensive-treatment method

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Embodiment

[0075] 1. Gob exploration

[0076] The well field of a certain mine is 964m long from east to west and 794m wide from north to south, and three coal seams of 42#, 43# and 45# are mined. The mining level of this coal seam is 593-643m, the mining depth is 200-250m, the thickness of the coal seam is 30-40m, the inclination angle of the coal seam is 41-46°, and the mining trend is nearly orthogonal to the line trend (80°-90°). There are relatively large subsidence basins distributed along the coal seam direction on the surface, most of the subsidence basins have been filled up, and the surface has been artificially covered with vegetation. There are many step-like fractures in the north-south direction of the subsidence basin, with a strike of 60-65°. The mining method in this mining area is storage type, which has been stopped.

[0077] At present, geophysical prospecting methods are widely used in gob exploration, and common methods include seismic exploration, geological rada...

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Abstract

The invention discloses an expressway underlie warehouse type inclined coal seam goaf comprehensive-treatment method, and provides a comprehensive and systematic comprehensive treatment method by comprehensively considering and improving multiple aspects such as goaf reconnaissance, stability analysis, a treatment technology and grouting quality detection. Through the joint connection of geophysical prospecting and geological work, the distribution situations of a goaf, various coal mining situations and coal seam essential characteristics are accurately obtained. By comprehensively considering cavity distribution, buried depth, overlying rock performances, roadbed types (excavation and embankment) and other factors, and referring to current domestic implemented projects and relevant regulations, a treatment range of the goaf is accurately calculated. According to the expressway underlie warehouse type inclined coal seam goaf comprehensive-treatment method provided by the invention, the grouting quality is detected through four detection methods, namely, drilling, acoustic detection, a high-density electrical method and ground deformation detection, and detection results obtained by the different methods can be verified mutually and can be compared with exploration results, so that a treatment effect of the goaf can be intuitively and accurately evaluated.

Description

【Technical field】 [0001] The invention belongs to the field of goaf management in coal seams, and in particular relates to a comprehensive treatment method for goafs in inclined coal seams under expressways. 【Background technique】 [0002] Geological disasters such as surface subsidence caused by gobs pose a great threat to human life and life. Storage coal mining method is a coal mining method that was applied to the mining of steeply inclined coal seams in the early stage. This coal mining method has a short continuous advance distance of the working face, a high roadway excavation rate, and a large loss of coal pillars. Very unfavorable. With the passage of time, due to the influence of downhole wind and groundwater, the coal pillars will continue to weather and peel off, and the supporting function will also continue to weaken. At this time, the roof may deform and peel off, which will cause problems such as surface settlement. With the rapid development of expressway ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21B21/00
CPCE21B21/00E21C41/18
Inventor 包卫星马志伟来弘鹏王海波
Owner CHANGAN UNIV
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