M.Tech Longwall and Mine Mechanization - M.Tech Longwall and Mine Mechanization is a postgraduate course in designing ,This is a type of underground coal mining where a long mass of coal is mined in a solitary cut (normally 0.6–1.0 m thick).The Longwall board (the square of coal that is being mined) is commonly 3–4 km long and 250–400 m wide. As a cut or cut is brought the length of the divider, the backings are crumpled, propelled nearer to the face, and reconnected, enabling rooftop to surr