FIELD: mining and construction. SUBSTANCE: method includes drilling of blasthole in monolithic object, installation of flexible member of elastomeric material with expands when heated into blasthole. Flexible member is mechanically compressed in direction of hollow longitudinal axis to take up gaps between pressing member and blasthole walls. When flexible member is heated to not above destruction temperature, it expands in volume and presses the blasthole walls. Objects is destroyed when pressure exerted on blasthole walls exceeds the material tensile strength. EFFECT: reduced cost and labor input in breakage of monolithic objects. 38 cl, 15 dwg
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Authors
Dates
1994-12-15—Published
1990-04-09—Filed