COMBINED DEVELOPMENT METHOD FOR FLAT-LAYING SEAMS OF COAL FIELD

摘要

FIELD: mining, particularly methods of underground or surface mining. ^ SUBSTANCE: method involves sinking underground entries to underground seam part along with seam drilling-out after surface drilling work stopping; leaving barrier pillar; performing developing entries and preparatory workings for underground seam cutting. Production works are carried out after or simultaneously with seam drilling out from surface. ^ EFFECT: possibility to extract coal beyond drilled-out section. ^ 2 dwg