Study on Gas Drainage Technology of Screen Pipe Putting Down Along Full Length Borehole in Soft Outburst Seam
XIAO LiHui
LI Yanming
GUO KunMing
ZHONG Pei
Abstract：According to the soft seam,low permeability,low borehole completed rate of the gas drainage borehole drilled and other problems of the soft and outburst seam, a technology of screen pipe putting down along full length borehole for gas drainage was developed. The technology was applied to the site experiment in Pingmei No. 10 and Xinji No. 1 Mine.The results showed the screen pipe putting rate for the technology of screen pipe putting down along full length borehole was over 97%. In comparison with the conventional drilling rod withdrawing and open hole technology, the average concentration of gas drainaged from a single borehole in Pingmei No. 10 mine increased by over two times and the average quantity of gas drainaged from a single borehole could increase by 3.5 times.In comparison with the normal drilling rod withdrawing and screen pipe putting down technology, the concentration of gas drainaged in Xinji No. 1 Mine was increased by one time nearly and the expected effect was reached.
Keywords：soft outburst seamgas drainagelarge borehole open and close type drilling bitscreen pipe
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( 61-64 )