Blasting over 40 feet of toe burden -- A case study to outline modern planning techniques
Conference
·
OSTI ID:433694
- Austin Powder Co., McArthur, OH (United States)
The use of angled shot holes can be extremely effective in blasting faces that either have a great deal of toe burden or where it is difficult to give a drill access to a face due to backbreak and face erosion. However, many quarry operators are wary of using angled holes because of the perceived possibility of increased flyrock and uncertainty of the driller`s abilities to drill at the designed angle. This paper discusses a situation in which a quarry was forced to drill angled holes due to the characteristics of the face. By using modern laser profiling technology, borehole deviation measurement and computer modeling of the face to be shot, the concerns about flyrock and other hazards were eliminated.
- OSTI ID:
- 433694
- Report Number(s):
- CONF-940144--
- Country of Publication:
- United States
- Language:
- English
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