Economic Feasibility Study of Hard rock Extraction Using ...
People normally use manual hand tools for rock extraction and use two type of crusher to crush these rocks. ... Mohammad Kashem Hossen, Md. Ashraful Islam Khan, and Mir Raisul Islam. "Economic Feasibility Study of Hard rock Extraction Using Quarry Mining Method at Companiganj Upazila in Sylhet District, Bangladesh." ... They are PS Stone ...