Numerical Simutation of the Gas Drainage Technology of Progressive and Large Diameter Buried Drainage Pipe
Abstract：After the upper protective seam being mined, along with the roof and floor moving and falling, the breakover crevasse would be formed in the coal rock layer between the level close to the ledger wall and the protective seam. Then with the decompression of the neighbor level, the gas enters the protective worked - out section through the crevasse. Owing to the existence of leak in the worked - out section, it＇s easy to cause the working surface comer gas ultra to limit. The technology of progressive and large diameter buried drainage pipe has been put forward and the best reasonable distance and drainage hole diameter of the buried drainage pipe is obtained through the FLUENT simulation.
Keywords：upper protective seamcomergas drainagelarge diameterburied pipe by wearing layersprogressive
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)