ROCK EXCAVATION. PROBLEMS OF EXTRACTION

TERRASSEMENT ROCHEUX - PROBLEMES D'EXTRACTION

THE AIM OF THE RESEARCH IS TO STUDY PROBLEMS ENCOUNTERED DURING EXTRACTION IN ROCK EXCAVATIONS WITH A VIEW TO DRAFTING TECHNICAL DOCUMENTS. A BIBLIOGRAPHIC STUDY OF THE VARIOUS EXPLOSIVES USED IN EARTHWORKS WAS CONDUCTED IN 1978. SIMULTANEOUSLY A SURVEY ON QUARRYING CONDITIONS WHEN EXPLOSIVES (DRILLING METHODS, BREAKING, BLASTING PLANS, QUALITY AND QUANTITY OF EXPLOSIVES) ARE USED, WAS CARRIED OUT AMONG EXPLOSIVE MANUFACTURERS AND SPECIALIZED ENTERPRISES. THE STUDY WAS COMPLETED WITH A VISIT TO EXTRACTION SITES. IN 1979,, IT IS ENVISAGED TO CONTINUE AND COMPLETE THE SURVEY, TO MAKE OBSERVATIONS ON REAL SITES, AND TO SET UP EXPERIMENTAL EXTRACTION SITES WHERE EXPLOSIVES ARE USED.