MT20 : MINE ENVIRONMENT & SAFETY ENGINEERING

Mine Environment & Safety Engineering
Unit - 1	MINE FIRES  1.1 Surface fire and underground fires, their causes, detection and prevention. Classification of fires, Portable fire extinguishers their applicability, places of portable fire extinguishers in mines, maintenance of fire extinguishers. 1.2 Spontaneous heating: Mechanism of spontaneous Heating, factors governing spontaneous heating, methods for study of spontaneous combustion of coal: crossing point method. Stages of spontaneous heating, Detection of spontaneous heating: Physical or sensory indicators, Precautions for prevention of spontaneous heating. 1.3 Model standing orders in event of fire. 1.4 Dealing with spontaneous heating & fires: Various methods, Sealing off: selection of site for fire stoppings, construction of fire stopping, fittings to stopping, inspection and maintenance of fire stoppings.
Unit - 2	SAMPLING OF MINE ATMOSPHERE & INTERPRETATION 2.1 Sampling from sealed off area: Sampling line, Methods of sampling from behind the fire stopping, frequency of sampling. 2.2 Sampling accessible places: water, air displacement method, evacuated sample holder type. 2.3 Composition and behavior of gases in sealed off area, interpretation regarding condition of heating: Graham’s ratio; interpretation regarding explosibility: Cowards Diagram. Elementary knowledge of gas chromatography. 2.4 Reopening of sealed off area: Factors governing decision of reopening, methods of reopening, selection of methods of reopening, precautions to be taken while reopening.
Unit - 3	FIRE DAMP EXPLOSION 3.1 Introduction, Composition of firedamp Modes of emission of Firedamp, Degree of gassiness, methane layering. 3.2 Mechanism of fire damp explosion, Flammability of firedamp, lower and upper limit of explosibility of firedamp, factors governing limits of flammability, lag on ignition. Explosive limits of other flammable gases. 3.3 Causes of fire damp explosion and its prevention. Characteristic of firedamp explosion
Unit - 4	COAL DUST EXPLOSION 4.1 Mechanism of Coal Dust explosion, Flammability limits of coal dust, factors governing explosibility of coal dust, Characteristics of coal dust explosion. 4.2 Causes of coal dust explosion, Prevention of coal dust explosion. 4.3 Generalized stone dusting, Quantity of stone dust, Types and properties of stone dust, stone dusting plan. 4.4 Stone dust barriers, types of stone dust barriers, specifications and construction, location of primary and secondary types of barriers. Situations under which barrier may fail, maintenance and care of stone dust barriers. Water barrier, Triggered barrier.
Unit - 5	INUNDATION 5.1 Surface and underground causes of Inundation and its prevention. 5.2 water dams, bulkhead doors. 5.3 Procedure of and precaution while approaching old water logged areas, pattern of bore holes, 5.4 Dewatering, burn side safety boring apparatus. 5.5 Standard of lighting in underground & opencast mines, cap lamps, its construction, maintenance and care, cap lamp room
Unit - 6	MINE RESCUE 6.1 Introduction, classification of mine rescues apparatus, modern self contained breathing apparatus BG 174, its construction, application and scope. Common tests of self contained compressed oxygen breathing apparatus. 6.2 Chemical oxygen self-rescuers, gas mask, filter self-rescuers: their construction, application and limitations. Fresh air hose type breathing apparatus. 6.3 Fresh air base: location, personnel & equipments required. Layout of FAB. 6.4 Resuscitation, Modern reviving apparatus