Application of hydrohammers of heavy class in the development of marble deposits in mining operations

By development marble deposits in mining operations one of the main technological processes, that ensures minimal losses and dilution with maximum output of commercial products is the process of preparing rocks for excavation. Marble extracted for the production of microcalcite is prepared for excavation by drilling and blasting at most mining enterprises. This inevitably leads to overgrinding in the charging chamber zone and, as a result, to a decreasing in quality indicators (yellowness and whiteness), significant losses of minerals (0-20 mm fraction) up to 30% and a low percentage of high-grade crushed stone in the commodity balance. The paper considers a variant of improving the production technology on the example of the Eleninsky marble Deposit (Chelyabinsk region) by using of heavy-class hydrohammers, which allows to increase the efficiency and completeness of the development of balance reserves by reducing by 5-10% overgrinding and increasing output of a commercial product high grades (40-200 mm).