MT20 : MINING METHODS – NON COAL

Mining Methods – Non Coal
Unit - 1	UNDERGROUND DEVELOPMENT 1.1 Terminology used in metal mines 1.2 Types of ore bodies 1.3 Types of underground opening, location of openings 1.4 Opening up of a mineral deposit by vertical shaft, inclined shaft, Adit 1.5 Level interval, factor considered while deciding level interval/length of back 1.6 Drivage of raises and winzes Driving manually, Modern methods Alimak, Long hole method, Drop raising, Raise Boring.
Unit - 2	UNSUPPORTED STOPING METHODS 2.1 Classification and choice of stoping Methods 2.2 Open stoping methods, underhand, overhand, Breast stoping, sublevel stoping, Blast hole stoping, VCR , Shrinkage method, their conditions of applicability, Sequence of Development, stoping operation, Cycle of operations etc. System of removal of ore from stope.
Unit - 3	SUPPORTED & CAVING METHODS 3.1 Artificially supported methods Cut and Fill, Square Set, Stulled stoping Methods. Their applicability, stope Preparation, stoping operation, cycle of operation, relative merits and demerits etc. 3.2 Caving methods - Top slicing, Sublevel caving and block caving methods, applicability, stope preparation stoping, cycle of operation etc. 3.3 PROVISIONS OF MMR 1961 regarding Means of Access and Egress, Ladders and ladder ways
Unit - 4	SHAFT SINKING 4.1 Size, shape, Factors considered for location of shaft, marking center, and shaft-centering arrangement 4.2 Ordinary sinking up to rock head, sinking of shaft below rock head- operation of drilling, charging and blasting and mucking operation. Disposal of debris 4.3 Shaft lining: Temporary lining, Permanent lining of shaft: Brick, monolithic, reinforced concrete lining, shaft tubing’s etc. 4.4 Walling scaffold, rider, ledge formation, underpinning, water garland crib etc.
Unit - 5	SPECIAL METHODS OF SHAFT SINKING 5.1 Different special methods of shaft sinking, condition of applicability of each method, Description etc. 5.2 Widening and Deepening of shaft
Unit - 6	BORING 6.1 Purpose of boring, classification of boring methods, applicability of boring methods 6.2 Drill Bits for various types of drilling/boring 6.3 Surface arrangement, assembly, working of Rotary boring, Screw and hydraulic feed mechanism 6.4 Core recovery, core barrels, Recover of broken tools, Bits 6.5 Bore hole survey, Deviation of boreholes