Method for partitioning gas tunnels

Abstract

The invention discloses a method for partitioning gas tunnels. The method is characterized in that based on the exploration of geological conditions of tunnel gas, the six main factors, i.e. absolute gas emission rate, gas pressure, coal structure type, geohydrologic conditions, distance to coal layers and geological structure, are taken into consideration comprehensively, the index of each main factor is quantified, and proposed gas tunnels are partitioned by mathematical models of gas tunnel partition presented by the invention; the method provides a systematic and reliable solution for partitioning the public road and railroad gas tunnels which penetrate through coal measure strata, so that with regards to different work areas with gas, corresponding construction measures can be adopted during the construction of the gas tunnels, thereby effectively preventing gas accidents from happening and ensuring the safety of constructors; and besides, the method saves the cost of construction measures, shortens the construction period and is of great importance to the implementation of engineering.

Description

technical field [0001] The invention relates to the technical field of gas tunnel construction, in particular to a method for partitioning gas tunnels. Background technique [0002] Gas tunnel zoning is to evaluate the safety zoning of different parts of the proposed tunnel according to different indicators such as gas pressure, gas content, groundwater conditions, and distance from coal seams during the survey and design stage, that is, to carry out safety zoning for the entire linear project of the tunnel, and divide Different gas sections. [0003] The "Technical Specifications for Railway Gas Tunnels" (TB10120-2002) defines a gas tunnel as: during the survey and construction of a railway tunnel, if the geological survey or construction inspection shows that there is gas in the tunnel, the tunnel should be designated as a gas tunnel. Gas tunnels are divided into three types: low gas tunnels, high gas tunnels and gas outburst tunnels. The type of gas tunnels is determined...

AI Technical Summary

Problems solved by technology

[0004] The code divides the tunnel work area according to the amount of gas emitted, but this method is too single and cannot systematically describe the gas situation of the entire tunnel

The geological conditions of gas tunnels are complex and there are many uncertain factors. A single gas concentration index cannot accurately describe the location, time, quantity and natural conditions of gas occurrence in the tunnel.

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