Negative Pressure of Gas Drainage Well at Surface Affected to Distribution of Gas Flow Filed in Goaf
Abstract：Taking a goal as all directional same nature porous medium, a basic closed equation group of the gas flow field in the goal was established. The FLUENT simulation software was applied to simulate the gas flow field within the goaf, analyze the gas concentration dis- tribution features within the goal under the different gas drainage conditions of the surface drilling boreholes. A study was conducted on the different negative pressure of the surface drilling boreholes affected to the gas flow field in the goaf. The study found that the surface drill- ing boreholes located in the goaf with 20 - 70 m near the air returning gateway would be favorable to the gas drainage and the negative pressure of gas drainage may bring a spontaneous combustion danger to the goaf. But with the certain monitoring and control measures, the 40 -50 kPa negative pressure of gas drainage could be acceptable .
Keywords：surface drainage wellgas flow field in goafnegative pressure of gas drainagenumerical simulation
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 38-40,88 )