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Hydraulic breakers are the oldest hydraulic attachments for carriers. The first serial manufactured rock breaker was the Krupp HM 400 in 1967 and the patent was secured in 1963. Excavator jack hammers are impact devices designed to break any kind of rock or concrete with any hardness or physical property. They have a wide range of appliions ...
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29/08/2021 · Slowgoing and dangerous it may have been, but ancient mining techniques were clever. The earliest mines sought cosmetic pigments for funerals. Picks and hammer stones are examples of stone age tools. Later, ancient man discovered metals which provided materials for .
06/04/2013 · GOLD STONE 5. PRE HISTORICAL MINING Since the beginning of civilization,people have used stones,ceramics for making tools and weapons. in ancient egypt malachite and maadi where excavated for ornamentation,pottery, mines of nubia was very greece and rome silver mines of laurium was very used hydraulic continent was also not .
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not be cut to remove explosive for making cartridge of different size. ... Hazards faced in stone mining operations S. No. Activity Hazard Description (Risk) Score Risk Level Consequen ces Exposur e Probabili ty Risk Score 1. Site planning and layout Travel in moving vehicle in uneven terrain 1 2 1 2 Level 3 2. Storage of explosives Unintended explosions (exposure to overpressure) 1 5 3 15 ...
