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Abstract Based on expatiating the rock blasting theory under multilateral boundary，the thesis combines a project of a high and steep road cutting blasting and proceeds application study of deep hole control blasting. Because the calculating of charge quantity of a high and steep road cutting blasting considers the various landform and geological conditions，the blasting result is availably controlled. Under the combined effect of explosion energy provided by explosive and the latent positional energy in medium，the rock masse of road cutting is adequately broken up. The flying rock does not be seen and the fragmentation rock collapses to fall in the roadbed scope. At the same time，the cushion blasting technique is adopted nearby the road slope and a complete road cut slope is shaped.
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Received: 30 April 2007
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