Method for evaluating gas tunnel outburst and device for implementing same

Abstract

The invention discloses a method for evaluating a gas tunnel outburst, an index system for implementing the method, and a device for implementing the method, which belong to the technical field of gas tunnel constructions and aim to evaluate the gas tunnel outburst. The method, the system and the device are characterized by establishing a prominence hazard index evaluation system table memory (1), a security level table memory (6) and a table memory (2), and inputting the following prominence hazard indexes on site: largest embedding depth, geological structure, advancing drilling power phenomenon, gas pressure, measurements of drilling gas outrush initial velocity and coal body structure types, and evaluation data, wherein the prominence hazard indexes are analyzed and evaluated to obtain an evaluation result; and because the indexes not only take geologic factors into consideration, but also discard a long process of indoor analysis, and the analysis and the identification can be performed at a construction site, the method, the system and the device has stronger practical meaning.

Description

technical field [0001] The invention relates to the technical field of gas tunnel construction, in particular to a gas tunnel outburst evaluation method and implementation equipment thereof. Background technique [0002] Tunnel coal and gas outburst refers to the sudden ejection of coal and gas during excavation. This ejection produces a large impact force in a short period of time (minutes or even seconds), destroys the working face, and discharges a large amount of coal, rock flow and gas from the depth of the coal seam, which can destroy the roadway facilities and cause suffocation, burning and Accidents such as explosions and coal and rock flow burial. [0003] According to incomplete statistics, the total number of coal and gas outbursts in all countries in the world has reached more than 30,000 times, and the outburst with the largest intensity occurred on July 13, 1969 at the Gagarin Mine in the former Soviet Union's Donbas mining area. Coal and gas outbursts, the a...

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Problems solved by technology

[0004] In comparison, the coal system has accumulated a set of effective production management rules and regulations over the years, has special explosion-proof and outburst-proof equipment, and has a professional team that has been dealing with coal and gas for a long time. The number of gas tunnels is small, lack of experience, lack of equipment, and lack of specific rules and regulations for coal and gas

In addition, the traffic tunnel has a large section and a tight construction period, which increases the difficulty of "outburst prevention". Once the location of the line is determined, the direction and position of the tunnel cannot be changed at will, and the difficulty of oblique coal mining often occurs

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