Mainly there are two parameters namely controlled and uncontrolled parameters.
Burden, Spacing, Hole depth, Delay, Type of explosive, No. of holes, Stemming height are some points which comes under controlled parameters, In other hand site conditions like geology of the area and strength of the rock are the uncontrolled parameters
The parameters to be considered for blast casting are the overburden rock characteristics, blast geometry, spacing to burden ratio, delay interval, stemming and decking.
The geological and structural parameters for determination the rock factor, then the geometrical parameters for obtaining an uniformity index according.