A
Acid Mine »
Mine water that contains free sulfuric acid mainly due to the weathering of iron pyrites.
Mine water that contains free sulfuric acid mainly due to the weathering of iron pyrites.
Adit »
A near Horizontal passage from the surface by which a mine is entered and deatred. A blind horizontal opening into a mountain, with only one entrance.
A near Horizontal passage from the surface by which a mine is entered and deatred. A blind horizontal opening into a mountain, with only one entrance.
Active Workings »
Any place in a mine where miners are normally required to work or travel and which are ventilated and inspected regularly.
Any place in a mine where miners are normally required to work or travel and which are ventilated and inspected regularly.
Advance »
Mining in the same direction,or order of sequence, first mining as distinguished from retreat.
Mining in the same direction,or order of sequence, first mining as distinguished from retreat.
Angle of repose »
The maximam angle of horizontal at which a given matarial will rest on a given surface wethout sliding or rolling.
The maximam angle of horizontal at which a given matarial will rest on a given surface wethout sliding or rolling.
Area (an airway) »
Average width multiplied by average height of air airway, expressed in square feet.
Average width multiplied by average height of air airway, expressed in square feet.
Auger »
A rotary drill that uses a scrw device to penetrate,break,and then transport the drilled matarial (coal).
A rotary drill that uses a scrw device to penetrate,break,and then transport the drilled matarial (coal).
Auxiliary ventilation »
Portion of main ventilating current directed to face of dead end entry by means of an auxiliary fan and tubing.
Portion of main ventilating current directed to face of dead end entry by means of an auxiliary fan and tubing.
Azimuth »
A surveying turm that references the angle messured clockwise from any meridian(The established line of reference). the bearing is used to designate direction. the bearing of a line is the acute horizontal angle b/w the meridian and the line.
A surveying turm that references the angle messured clockwise from any meridian(The established line of reference). the bearing is used to designate direction. the bearing of a line is the acute horizontal angle b/w the meridian and the line.
B
Belt conveyor »
A looped belt on which the coal or other matarial can be carried and which is generally constructed of flame resistant matarial or of reinforced rubber or rubber like substance.
A looped belt on which the coal or other matarial can be carried and which is generally constructed of flame resistant matarial or of reinforced rubber or rubber like substance.
Bench »
One of to or more division of a coal seam seprates by state or formed by the process of cutting the coal.
One of to or more division of a coal seam seprates by state or formed by the process of cutting the coal.
Blasting cap »
A detonator containing a charge of detonating compound,which is ignited b electric current or the spark of a fuse. used for detonating explosives.
A detonator containing a charge of detonating compound,which is ignited b electric current or the spark of a fuse. used for detonating explosives.
Blasting circuit »
Electric circuit used to fire electric detonators or to ignite an ignite an igniter cord by means of an electric starter.
Electric circuit used to fire electric detonators or to ignite an ignite an igniter cord by means of an electric starter.
C
Cage »
In a mine shaft, the device similar to an elevator car, that is used for hoisting personnel and materials.
In a mine shaft, the device similar to an elevator car, that is used for hoisting personnel and materials.
Calorific Value »
The quantity of heat that can be liberated from one pound of coal or oil measured in BTU's.
The quantity of heat that can be liberated from one pound of coal or oil measured in BTU's.
Cap »
A miner's safety helmet. Also, a highly sensitve, encapsulated explosive that is used to detonate large but less sensitive explosives.
A miner's safety helmet. Also, a highly sensitve, encapsulated explosive that is used to detonate large but less sensitive explosives.
Cap Block »
A flat piece of wood inserted between the top of the prop and the roof to provide bearing support.
A flat piece of wood inserted between the top of the prop and the roof to provide bearing support.
Car »
A railway wagon, especially any of the wagons adapted to carrying coal, ore, and waste underground.
A railway wagon, especially any of the wagons adapted to carrying coal, ore, and waste underground.
Caste »
A directed throw, in strip-mining, the overburden is cast from the coal to the previously mined area.
A directed throw, in strip-mining, the overburden is cast from the coal to the previously mined area.
Chain Conveyor »
A conveyor on which the material is moved along solid pans by the action of scraper crossbars attached to powered chains.
A conveyor on which the material is moved along solid pans by the action of scraper crossbars attached to powered chains.
Cleat »
The vertical cleavage of coal seams. The main set of joints along which coal breaks when mined.
The vertical cleavage of coal seams. The main set of joints along which coal breaks when mined.
Coal Reserves »
Measured tonnages of coal that have been calculated to occur in a coal seam within a particular property.
Measured tonnages of coal that have been calculated to occur in a coal seam within a particular property.
Coke »
A hard, dry carbon substance produced by heating coal to very high temperature in the absence of air.
A hard, dry carbon substance produced by heating coal to very high temperature in the absence of air.
Collar »
The term applied to the timbering or conrete around the mouth or top of a shaft. The beginning point of a shaft or drill hole at the surface.
The term applied to the timbering or conrete around the mouth or top of a shaft. The beginning point of a shaft or drill hole at the surface.
D
Deposit »
Mineral deposit or ore deposit is used to designate a natural occurrence of useful mineral, in sufficient extent.
Mineral deposit or ore deposit is used to designate a natural occurrence of useful mineral, in sufficient extent.
Development »
Work undertaken to open up coal reserves as distinguished from the work of actual coal extraction.
Work undertaken to open up coal reserves as distinguished from the work of actual coal extraction.
Diffuser Fan »
A fan mounted on a continuous miner to assist and direct air delivery from the machine to the face.
A fan mounted on a continuous miner to assist and direct air delivery from the machine to the face.
Dip »
The inclination of a geological structure from the horizontal.It is always measured downwards at right angle to the strike.
The inclination of a geological structure from the horizontal.It is always measured downwards at right angle to the strike.
Dome »
A rock structure containing the oldest strata at the inner portion and youngest at the outer portion.
A rock structure containing the oldest strata at the inner portion and youngest at the outer portion.
Dragline »
A large excavation machine used in surface mining to remove overburden covering the coal seam.
A large excavation machine used in surface mining to remove overburden covering the coal seam.
Drainage »
The process of removing surplus ground or surface water either by artificial means or by gravity flow.
The process of removing surplus ground or surface water either by artificial means or by gravity flow.
Drift »
A horizontal passage underground.A drift follows the veins,as distinguished from a crosscut that intersects it.
A horizontal passage underground.A drift follows the veins,as distinguished from a crosscut that intersects it.
Drift Mine »
An u/g coal mine in which the entry or access is above water leveland generally on the slope of a hill,driven horizontally into a coal seam.
An u/g coal mine in which the entry or access is above water leveland generally on the slope of a hill,driven horizontally into a coal seam.
E
Entry »
An u/g horizontal or near-horizontal passage used for haulage,ventilatio, or as a mainway; a coal heading; a working place where the coal is extracted from the seam in the initial mining.
An u/g horizontal or near-horizontal passage used for haulage,ventilatio, or as a mainway; a coal heading; a working place where the coal is extracted from the seam in the initial mining.
Exploration »
The search for mineral deposits and the work doe to prove or establish the extent of a mineral deposit.
The search for mineral deposits and the work doe to prove or establish the extent of a mineral deposit.
Explosive »
Any rapidly combustive or expanding substance.The energy released during this rapid combustion or expansion can be used to break rock.
Any rapidly combustive or expanding substance.The energy released during this rapid combustion or expansion can be used to break rock.
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