Hello, 

According to 2018 cutoffs, with OBC-NCL rank of 3100, you can get Mining engineering, Mineral engineering, Mining Machinery Engineering,  Engineering Physics, Environmental engineering at IIT Dhanbad. You can also get Civil engineering,  Metallurgical and Materials Engineering at IIT Ropar. Please note that this prediction is completely based on 2018 cutoffs. Cutoffs can vary from year to year based on factors like number of students appearing for the examination, number of seats available, difficulty level of the paper etc. 

I hope it helps. For any further queries, ask me in the comments. 

All the best!!!