Total Questions: 60 Questions | Time Duration: 60:00 Minutes
Underground Mining Methods; Choice of methods of developments and stopping and factors affecting the same; statutory provisions.
Primary and secondary Development; Choice of level interval and back/block length; main haulage drifts and tunnels; high speed drifting; excavation and equipping of grizzly (conventional and mechanized), ore/waste bin, main ore-pass system, underground crushing, loading and hoisting stations, underground service chambers, sump and other subsidiary excavations.
Cross-cut and drifts; raises and winzes; ground breaking; mucking; ventilation and support; extension of track and other services; modern drilling and loading equipment; Alimark and Jora-lift raising, long-hole and vertical crater retreat (VCR) raising; Raise boring systems; mechanized winzing.
Stopping :- Classification, selection of stopping methods and applicability; slope layouts, stope preparation and production operation ground breaking, mucking, ventilation, supports, haulage and dumping; stopping of narrow and wide ore bodies; mining of parallel veins; open, supported, filled and caving methods; combined systems and special methods; underhand, overhand, breast, long-hole and raise, resuing, room & pillar, sublevel, large diameter blast hole (DTH), cascade, shrinkage, vertical crater retreat, horizontal cut and fill, square set, top slicing, sub-level caving, block caving methods, combined open room, shrinkage and cut-fill and subsequent filling systems; hydraulic, thermal, hydro chemical, bio chemical and nuclear device mining system; design and construction of draw points; mechanics of draw and draw control procedure; recovery and dilution; problems of deep mining and the remedial measure; design and layout of stopes in rock burst prone mines, mining sequence and rationale.