Quick Extinguishing Device for Gas Flame Sprayed from Short Boreholes in Fully Mechanized Mining Face

Abstract

The invention provides a fast extinguishing device for gas flames sprayed out by a fully-mechanized coal mining face short drill hole. The fast extinguishing device comprises a gas exhaust metal round pipe, an elastic sealing hole rubber sleeve, a heat insulating and flame retarding rubber sleeve, a flame arrester, a flame retarding rubber hose and an iron wire protecting screen. One end of the gas exhaust metal round pipe are connected with the flame arrester and the iron wire protecting screen into one through welding, and the other end of the gas exhaust metal round pipe is connected with the flame retarding rubber hose through an inserting method and the like. The outer wall of a part, inserted into the short drill hole, of the gas exhaust metal round pipe is wrapped with the elastic sealing hole rubber sleeve, the outer wall, outside the short drill hole, of the gas exhaust metal round pipe is wrapped with a layer of flame retarding and heat insulating rubber. When the fully-mechanized coal mining face short drill hole sprays out gas flames, the iron wire protecting screen of the device faces the direction of the flame spraying drill hole and is inserted into the flame spraying drill hole fast, the flames sprayed out from the short drill hole can be extinguished fast, and gas in the short drill hole can be guided out safely.

Description

technical field [0001] The invention relates to a quick extinguishing device, in particular to a quick extinguishing device suitable for gas flames suddenly ejected from a short borehole in a fully mechanized coal seam with high gas or coal and gas outburst. Background technique [0002] In coal mine production, high gas and coal and gas outburst coal seam fully mechanized mining face account for a relatively large proportion. In order to prevent gas disasters and prevent gas from exceeding the limit in fully mechanized mining face, it is often used to drill short holes on the coal wall of fully mechanized mining face. Method for gas extraction. However, the drilling of short boreholes and the extraction of gas are carried out in the maintenance class. It often occurs that the time for intubation and drainage of some short boreholes is too short or the front of the short borehole comes into contact with some geological conditions containing a large amount of gas. In the pro...

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Problems solved by technology

However, the drilling of short boreholes and the extraction of gas are carried out in the maintenance class. It often occurs that the time for intubation and drainage of some short boreholes is too short or the front of the short borehole comes into contact with some geological conditions containing a large amount of gas. In the production shift, after the drainage pipe is pulled out, the high-concentration gas will continue to gushe out to the space of the fully mechanized mining face through the short borehole with a relatively large flow rate due to insufficient drainage. The gas gas at the outlet diffuses and mixes with the air around the short borehole

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