SPLITTING AND PRESPLITTING OF ROCK WITH EXPLOSIVES. THEORETICAL ASPECTS. PRACTICAL ASPECTS
DECOUPAGE ET PREDECOUPAGE A L'EXPLOSIF - ASPECTS THEORIQUES ASPECTS PRATIQUES
The splitting and presplitting of rocks consist in creating a crack along a rock wall by means of simultaneous blasting operations in blast-holes with a light charge. These techniques have been extensively used for the last few years in the construction of large-scale rock cuttings. They facilitate the cutting of regular faces and limit cracks in the remaining in-situ rock thus limiting also the surface weathering of the rock, rock falls and, consequently, maintenance costs. The development of these techniques took place of experimental sites, and theoretical studies gave a better understanding of the failure plane linking two blast-holes simultaneously fired. These methods have been very successfully used in underground construction works resulting in large savings in temparary supports and volume of placed concrete. See also IRRD abstract 100543. /TRRL/
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Authors:
- Weber, P
- Panet, M
- Publication Date: 1971-7-15
Language
- French
Media Info
- Features: Figures; Photos;
- Pagination: p. 89-98
- Serial:
Subject/Index Terms
- TRT Terms: Conferences; Cracking; Cutting; Excavation; Explosive excavation; Presplitting (Blasting); Rock fracture; Rocks; Tunneling
- Geographic Terms: France
- Old TRIS Terms: Excavation technology; Presplitting
- ITRD Terms: 5188: Blasting; 8525: Conference; 5211: Cracking; 2812: Cutting (earthworks); 5117: Mine; 5147: Presplitting (rock); 4154: Rock; 5757: Rock mechanics; 2831: Slope (terrain); 3374: Tunnel
- Subject Areas: Bridges and other structures; Construction; Geotechnology; I43: Rock Mechanics; I54: Construction of Tunnels;
Filing Info
- Accession Number: 00096687
- Record Type: Publication
- Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
- Report/Paper Numbers: Conf Paper
- Files: ITRD, TRIS
- Created Date: Aug 27 1975 12:00AM