Application of New Gas Drainage Hole Drilling Technology in Soft Coal Seam in Pingdingshan No. 10 Mine
FENG Dajun
KONG Wei
XU Shubin
XIAO Lihui
Abstract： The direct gas control measure is to drill gas drainage holes, but the depth of the finished holes and the gas drainage effect in the soft coal seam with Polodyakonov coefficient lower than 0. 5 are not ideal,which will leave the hidden danger in drivage operation. A new gas drainage hole drilling technology was applied in Pingdingshan No. 10 Mine in order to change the present gas drainage status in soft coal seam. The test results showed that the gas drainage effect was obvious,the hole-forming rate reached 80% or more,and the gas drainage amount increased by 8 times,which effectively improved the gas drainage rate and can provide an effective guarantee for safe production in coal mines.
Keywords：gas drainagesoft coal seamboreholemultifunctional drilling stemopen and closed drilling bit
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 69-72 )