Flow method and device for predicting coal roadway outburst by increasing resistance and diversion continuous drilling

Abstract

The invention discloses a flow method for predicting coal roadway outburst through increased-resistance guide continuous drilling and a device thereof, and belongs to a method and a device for predicting the coal roadway outburst. The device consists of a hole sealing device, a flow pipe, a main machine, a coal chip funnel, an electric coal drill, a high-flow speed sensor, a low-flow speed sensor, a displacement sensor, a hand pump, a coal chip discharge pipe, a hemp-flowers drill rod, a positioning baffle plate, a guide device, a double-cone filter cylinder, a material level switch and a push rod. The percolating resistance of the coal chip discharge pipe is increased through the fuel capable of externally adding coal chips; and gas gushing from a drill hole is guided to a flow pipe with lower resistance, so that a computer and a sensor technology are combined to measure the gas gushing quantity and distribution in the drilling process under the condition of adopting the hemp-flowers drill rod to continuously drill a working surface so as to form the method for predicting the coal roadway outburst through continuous drilling. The device has the advantages of simple structure, convenience for use and accurate and reliable test, and is used for judging if a coal roadway generates the outburst in the driving process or how far the working surface of the coal roadway is forwards pushed without generating the outburst.

Description

technical field [0001] The invention relates to a flow method and device for predicting coal roadway outburst, in particular to a flow method and device for predicting coal roadway outburst by increasing resistance and diversion continuous drilling. Background technique [0002] As we all know, the coal roadway outburst prediction methods commonly used underground are all "point prediction" methods. Article 74 of the "Regulations on the Prevention and Control of Coal and Gas Outburst" stipulates that the following methods can be used to predict the outburst risk of coal roadway driving face; [0003] 1. Drilling cuttings index method; [0004] 2. Composite index method; [0005] 3. R ​​value index method; [0006] 4. Other methods that have been proven effective by experiments (temperature of drilling cuttings, temperature of coal body, amount of gas gushing out after blasting, etc.). [0007] Articles 75, 76 and 77 of the "Regulations on the Prevention and Control of Coa...

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Problems solved by technology

[0008] The weak point of above-mentioned method is: in the production practice of coal mines all over the place, adopt these methods to predict inaccurate situation frequently, some even occur the example of low index outstanding, cause serious casualty accident, also cause serious harm to the workman who goes down the well on the spot. psychological panic

Because it is very troublesome to insert the twist drill pipe, at the same time, a considerable part of the gas will leak during the access of the drill pipe, which affects the use of this equipment

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