Economic Feasibility Study of Hard rock Extraction Using ...
2020-8-21 · Economic Feasibility Study of Hard rock Extraction Using Quarry Mining Method at Companiganj Upazila in Sylhet District, Bangladesh. Mohammad Kashem Hossen Chowdhury 1,, Md. Ashraful Islam Khan 1, Mir Raisul Islam 1. 1 Department of Petroleum and Mining Engineering, Shahjalal University of Science and Technology, Sylhet, Bangladesh