TY  - JOUR
T1  - Determination of the Braking Factor in Bench Blasting for Dimension Stone Production: A Case Study of Crushed Rock Industry, Supare-Nigeria
AU - , M.A. Saliu 
JO  - Journal of Engineering and Applied Sciences
VL  - 3
IS  - 1
SP  - 123
EP  - 127
PY  - 2008
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2008.123.127
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2008.123.127
KW  - Detonation
KW  -dynacord
KW  -gun powder
KW  -breaking factor
KW  -spacing
KW  -initiation device
KW  -recovery
KW  -design
AB  - Dimension stone quarry is belief to be type of mining operation that always result to low recovery since what is expected from the extracting operation is a cubical block with no fracture. It is noticed that majority of the damage in the natural blocks are always from poor extraction method. In aggregate quarry, series of work have been done on powder factor that gives economical blasting. In this research, breaking factor is used in place  of  powder  factor  since  breaking is required not powder. The aim of this research is to establish a standard breaking factor for bench blasting in dimension quarries that will improve recovery. Two cases were considered. In case 1, gun powder is used for basal cutting. Of the seven patterns considered, pattern 3 gives highest recovery (70%) with breaking factor of 23.15 g m <SUP>3</SUP> (i.e. 5 kg of Gun powder for (6 by 6 by 6) m bench design). In the case 2, dynacord is used for basal cutting. Of the four patterns considered, pattern 2 gives highest recovery (55%) with breaking factor of 15 g m <SUP>3</SUP> (i.e. 3.24 kg of explosive for (6 by 6 by 6) m bench design.
ER  -