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انفجار درمعدن به طور کلی در دو مرحله، انفجار اولیه و انفجار ثانویهرخ میدهد. انفجار اولیه فعالیتی است که در آن سنگهای درجا در حین پیشروی و حفاری و در معدنکاری سطحی با حفر چال در سنگ، خرجگذاری آنها با مواد منفجره و منفجر شدن چالها به ترتیب برنامهریزی شده شکسته میشوند. اهداف اصلی فنیانفجار …
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