Method for estimating gas emission quantity of tunnel face of non-coal gas tunnel

The invention discloses a method for estimating the gas emission amount of a tunnel face of a non-coal gas tunnel. The method comprises the steps that the stratum permeability, the porosity, the drill hole radius and physical parameters in a drill hole of the tunnel face are obtained; wherein the ph...

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Bibliographic Details
Main Authors SU PEIDONG, QIU PENG, LI YOUGUI, HE KUNCHEN
Format Patent
LanguageChinese
English
Published 02.12.2022
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:The invention discloses a method for estimating the gas emission amount of a tunnel face of a non-coal gas tunnel. The method comprises the steps that the stratum permeability, the porosity, the drill hole radius and physical parameters in a drill hole of the tunnel face are obtained; wherein the physical parameters comprise pressure, concentration and gushing speed in a drill hole; acquiring a pressure field distribution model of the tunnel face area on the basis of the stratum permeability, the porosity, the drilling radius and the pressure in the drilling hole; acquiring fracture permeability based on the pressure field distribution model of the tunnel face area; and the area of the tunnel face and the crack rate of the tunnel face are obtained, and the gas emission amount is obtained based on the area of the tunnel face, the crack rate of the tunnel face, the concentration and the crack permeability. Compared with an existing calculation mode, the gushing amount calculation method provided by the inventio
Bibliography:Application Number: CN202211242132