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Method for controlling water inrush and sand inrush under coal mine

A water inrush and sand breaking technology, which is applied in mining equipment, mining equipment, earthwork drilling and mining, etc., to achieve the effects of not being easy to waste holes, saving engineering costs, and reducing slurry consumption

Inactive Publication Date: 2014-03-19
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preventing and controlling water and sand inrush underground in coal mines, which solves the problem of installing grouting pipes under cheap drill bits, and uses cheap grouting pipes to perform high-pressure grouting on specific layers. Consolidation grouting pipes and high pressure grouting problems

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  • Method for controlling water inrush and sand inrush under coal mine
  • Method for controlling water inrush and sand inrush under coal mine
  • Method for controlling water inrush and sand inrush under coal mine

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Embodiment Construction

[0024] The following describes the present invention in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to make a clearer and clearer definition of the protection scope of the present invention.

[0025] A method for preventing water inrush and sand burst in underground coal mines includes four parts: a grouting pipe is installed under a disposable drill bit, the drill cap of the disposable drill bit is separated from the drill body, consolidating the grouting pipe and grouting into a specific formation.

[0026] The first step is to set up a grouting pipe with a disposable drill bit: such as figure 1 As shown, the disposable drill body 3 is connected to the drill pipe 4, the grouting pipe 8 passes through the through hole in the drill pipe 4, and the disposable drill cap 2 and the grouting pipe 8 are connected to the drill connector 6 through the grouting...

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Abstract

The invention discloses a method for controlling water inrush and sand inrush under a coal mine. The method comprises the steps that an injection pipe is arranged below by utilizing a disposable drilling bit device; a disposable drilling bit cap is separated and exited from a drilling body; the injection pipe is fixedly connected; and a special stratum is injected. The method for controlling the water inrush and the sand inrush is high in injection success rate, good in fixed injection pipe connection quality, great in injection pressure, high in drilling and injection combined efficiency and low in injection cost, and safe, quick, cheap and high-quality reconstruction can be achieved for the special stratum. The method achieves that the injection pipe is arranged below a drilling bit, high-pressure injection is performed on the special stratum by utilizing the fixedly connected injection pipe.

Description

Technical field [0001] The invention belongs to the technical field of coal mine water prevention in mining engineering, and specifically relates to a method for preventing water inrush and sand burst in underground coal mines. Background technique [0002] When the shallow coal seam mining face passes through the overlying bedrock layer is thin and there is a water-rich loose layer area above the bedrock, the huge goaf space caused by coal mining may cause the overlying bedrock to break and cause the loose layer to be rich. The water and sand in the water area were introduced into the mine, causing water inrush and sand break accidents, causing serious mine disasters and losses. At present, when the fully mechanized coal mining face passes through this kind of area, three methods are mainly adopted: reasonable setting of coal pillars, ground drilling and grouting to transform the loose layer characteristics and underground drilling and grouting to transform the loose layer chara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/00
Inventor 徐拴海李雄伟邢龙龙吴璋王晓东杨永健
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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