Study on drilling release pressure parameters of gateway in ＂three soft＂ coal seam
Abstract：The control technology for surrounding rock around gateway is always one of factors restricting high production and high efficiency in ＂three soft＂ seam mining. Based on the geological conditions at Yonghua No. 1 mine, the traditional support method cant solve gateway supporting problem in ＂three soft＂ coal seam, the coupling support technology of drilling release pressure and U - steel is put forward through theoretical analysis and field test. That is, pressure relief by borehole among gateway U - steel support leave space for surrounding deformation, reduce surrounding stress, and achieve the purpose of gateway stability; Field test shows that the coupling support scheme of pressure relief by borehole and U - steel controls effectively the deformation of surrounding rock around gateway, and the supporting effect is good. It is provided the theoretical and practical basis for controlling the deformation of surrounding rock around gateway in ＂three - soft＂ coal seam.
Keywords：＂three soft＂ coal seampressure relief by boreholecoupling support
Publication Date：2011-09-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 529-533 )