METHOD FOR INCREASE OF STABILITY OF PREPARATORY WORKING

摘要

Method for increase of stability of preparatory working includes formation of slant hole in side wall of working at side of coal massif, yielding barrier, working-out of faces. Before face working out one forms yielding barrier at side of massif and at side of face through explosion of camouflet charges, out of zone of support rock pressure. After face working out one fills the slant hole with rocks of the base of the working having raised, then next face is worked out. Support of needed cross-section of working is provided and increase of safety of implementation of works.