A Glossary of Terms Used in Coal MiningE. & F.N. Spon, 1883 - 296 sider |
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Side 13
... thickness . BARRIER . A solid block or rib of coal , & c . , left un- worked between two collieries or mines for security against accidents arising from the influx of water from one to another ; in width often as much as 100 yards ...
... thickness . BARRIER . A solid block or rib of coal , & c . , left un- worked between two collieries or mines for security against accidents arising from the influx of water from one to another ; in width often as much as 100 yards ...
Side 18
... 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 Heap ...
... 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 Heap ...
Side 20
... 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 DIAMONDS . A ...
... 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 DIAMONDS . A ...
Side 26
... thickness of strata . 2. The proportion of the sectional area of a pipe filled with running water . When a pipe is discharging water to its greatest capacity , i.e. when the pipe is quite full , it is said to be running full bore . 3. A ...
... thickness of strata . 2. The proportion of the sectional area of a pipe filled with running water . When a pipe is discharging water to its greatest capacity , i.e. when the pipe is quite full , it is said to be running full bore . 3. A ...
Side 28
... Fig . 21 . It has a capacity of from 8 to 20 cwt . , varying according to the thickness of the seam worked , and the height and width of the roads ; and weighs from 3 to } 1 6 cwt . The wheels are from 10 to 15 28 A GLOSSARY OF TERMS.
... Fig . 21 . It has a capacity of from 8 to 20 cwt . , varying according to the thickness of the seam worked , and the height and width of the roads ; and weighs from 3 to } 1 6 cwt . The wheels are from 10 to 15 28 A GLOSSARY OF TERMS.
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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.