A Glossary of Terms Used in Coal MiningE. & F.N. Spon, 1883 - 296 sider |
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Side 3
... feet for ventilating a heading or a sinking pit . " AIR - COURSE . Any underground roadway used for the special purpose of ventilation . AIR - CROSSING . A bridge which carries one air - course over another . In collieries liable to ...
... feet for ventilating a heading or a sinking pit . " AIR - COURSE . Any underground roadway used for the special purpose of ventilation . AIR - CROSSING . A bridge which carries one air - course over another . In collieries liable to ...
Side 12
... feet above the heads of the men . There was only one rope used for raising and lowering men ; the second was a chain , which was sent up empty , or without anything attached to it , when men were descending , and vice versâ . When the ...
... feet above the heads of the men . There was only one rope used for raising and lowering men ; the second was a chain , which was sent up empty , or without anything attached to it , when men were descending , and vice versâ . When the ...
Side 17
... . A small tram or car of about 7 cubic feet capacity used in the breasts for carrying coal from the face of the workings to the shoot or chute down which it is dumped to the gangway platform for reload- USED IN COAL MINING , ETC. 17.
... . A small tram or car of about 7 cubic feet capacity used in the breasts for carrying coal from the face of the workings to the shoot or chute down which it is dumped to the gangway platform for reload- USED IN COAL MINING , ETC. 17.
Side 18
... feet in thickness ) . Also to break up with Wedge Fig . 14 . Roof Copt Floor BENCH WORKING . The system of working one or more seams or beds of mineral by open working in stages or steps as shown in diagram , Fig . 15 . Fig . 15 . Sport ...
... feet in thickness ) . Also to break up with Wedge Fig . 14 . Roof Copt Floor BENCH WORKING . The system of working one or more seams or beds of mineral by open working in stages or steps as shown in diagram , Fig . 15 . Fig . 15 . Sport ...
Side 20
... feet in thickness overlying the coal measures , which in dry weather opens and cracks up like fissures . BLACK - DAMP . Carbonic acid gas , much the same as after - damp . It will not support combustion , and is very deadly . BLACK ...
... feet in thickness overlying the coal measures , which in dry weather opens and cracks up like fissures . BLACK - DAMP . Carbonic acid gas , much the same as after - damp . It will not support combustion , and is very deadly . BLACK ...
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apparatus bank bars beds blasting borehole boring rods brattice butty cage carried chain clay cloth Clunch coal measures coal seam Coal-field colliery constructed crown 8vo cylinder débris diameter drift driven drum edition empty engine plane explosion face fault feet fire fire-damp fixed floor furnace goaf ground haulage heading hole horse inbye inches inclined plane iron iron pyrites ironstone kind Kirving length load long-wall lower machinery minerals mines P. L. SIMMONDS pillar of coal pipe pit bottom pit-shaft plates prop pulley pumps raised rock roof running safety lamp sandstone seam of coal self-acting shale short side sinking pit slack solid coal sprags stall steam stone strata stratum surface thickness thin timber tool trams Treatise tubs underclay underground road upcast shaft ventilation vertical wagons wall wedging crib weight wheels winding engine winding rope wooden yards
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Side 297 - Section I. On the Equality and Distribution of Forces — Section II. Resistance of Timber — Section III. Construction of Floors — Section IV. Construction of Roofs — Section V. Construction of Domes and Cupolas — Section VI. Construction of Partitions — Section VII.