Test of Gas Drainage from Gob Area by Surface Wells in Chengzhuang Coal Mine
SUN Haitao
Abstract：No. 3 coal seam is the major excavating seam in Shanxi Jincheng Coal Mining Area and is extracted with large mining height and high strength, which often caused a large amount of methane emitted from the working face and led to the gas under difficult control. For this reason, the surface wells were drilled above the mining area of Chengzhuang Mine to drain the coal-bed methane from the mining influence area and gob area based on the mining stress relief action and the methane emission rule in the gob area. In addition, the position and structure of the test wells were optimized by using the step-by-step optimization design method. The test results showed that the methane drainage concentration from the gob area was more than 50%, this thus reduced the difficulty of methane control in the working face, the test effect was better.
Keywords：mining areagob areacoal-bed methanesurface welldrainage test
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1-3,19 )