METHOD OF DRILLING AND BLASTING OPERATIONS Russian patent published in 1998 - IPC

FIELD: mining industry; may be used in driving of railroad tunnels and subways, in mining of semiprecious stones in breakage of natural and artificial obstacles. SUBSTANCE: main distinguishing feature of the invention is conduction of reactions in compositions based on hydrogen peroxide with offered combustible in deflagration - nondetonation conditions of burning in ampoules (vessel) with composition. Ampoule (vessel) is installed on bottom of drilled blast hole or pad from stone chips and water (if blast hole depth exceeds 1.5 m) and stemmed. It excludes shattering effect (brisance), practically excluded formation of seismic waves and as a result fissures and microfissures, both in separated rock and in rock massif itself, formation and spray of minor fragments. Process parameters are regulated within a wide range by variation of concentration of combustibles in composition, their types, dispersity and also portion of gel formation agent - for compositions based on gel-like hydrogen peroxide. Base of composition may be in the form of liquid and gel-like hydrogen peroxide. In the latter case gel-formation agent is used in the form of carbomer-150. EFFECT: higher productivity of labor; reduced cost of work; higher safety and ecological satisfactory effect. 3 cl