Conclusions

F i g . 28. R e l a t i v e s p e c i f i c charge as a f u n c t i o n of p a r t i c l e s i z e .

11 Conclusions

Experimental and p r a c t i c a l experience i n d i c a t e s t h a t b l a s t i n g w i t h d r i l l e d - i n charges i s a f e a s i b l e method. I t i s e s p e c i a l l y s u i t a b l e f o r t h i c k e r s t r u c t u r e s .