Most of the metallurgical jobs are related to extraction of materials and generally chemical engineers from good college are prefered for that. As roorkee is not that good for Metallurgy you shoudnt opt fot that.
Regarding Mining, if you are optong for that its better to opt for ISM Dhanbad than going for kharagpur as the former is best in this field.
There are other options also for you at ISM Dhanbad like electrical, mechanical and if not New IITs will be a safe option as they have only core branches like electrical, mechanica, Comp, Civil. This will also be a safe option.