The Colliery Manager's Handbook: A Comprehensive Treatise on the Laying-out and Working of Collieries Designed as a Book of Reference for Colliery Managers and for the Use of Coal-mining Students Preparing for First-class CertificatesCrosby Lockwood and Son, 1891 - 578 halaman |
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Halaman 168
... road a door , either of brattice cloth or wood ; a double line across the road a permanent stopping . Two methods of working peculiar to South Wales are the " Single Road " and the " Double Road Stall " systems . Both systems are ...
... road a door , either of brattice cloth or wood ; a double line across the road a permanent stopping . Two methods of working peculiar to South Wales are the " Single Road " and the " Double Road Stall " systems . Both systems are ...
Halaman 169
... road is made next the coal on the rise side , and an air - course formed next the coal on the lower side . The road thus forms a straight line to the heading , and the air - course is really a continuation at right- angles of the air ...
... road is made next the coal on the rise side , and an air - course formed next the coal on the lower side . The road thus forms a straight line to the heading , and the air - course is really a continuation at right- angles of the air ...
Halaman 170
... road , whence it is conveyed by horses . When the main level has advanced sufficiently , another heading similar to the first is turned . There are about 90 yards of coal between the two headings . The stall which has reached a point ...
... road , whence it is conveyed by horses . When the main level has advanced sufficiently , another heading similar to the first is turned . There are about 90 yards of coal between the two headings . The stall which has reached a point ...
Halaman 173
... Road Stall systems of working . The latter , as shown in Fig . 171 , has a main level from the shafts carried as a ... road out of the headings , two roads , separated by 18 yards of coal at the commencement , are turned and after ...
... Road Stall systems of working . The latter , as shown in Fig . 171 , has a main level from the shafts carried as a ... road out of the headings , two roads , separated by 18 yards of coal at the commencement , are turned and after ...
Halaman 178
... roads , and also between them ; the chocks on one side of the road are placed not opposite those on the other , but so as to break band with them . The chocks are 3 feet long , and old round timber is used for them . They are filled ...
... roads , and also between them ; the chocks on one side of the road are placed not opposite those on the other , but so as to break band with them . The chocks are 3 feet long , and old round timber is used for them . They are filled ...
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Istilah dan frasa umum
airway allow angles arrangement attached Barnsley boiler bore-hole bottom brattice cage carbonic acid centre chain chocks Clifton Hall Colliery coal measures Coal Seam Colliery Cornish cubic feet cubic foot cylinder depth distance downcast drill driven drum engine explosion face fathoms feet of air feet per minute fire-damp fireclay flue foot friction furnace hole horizontal horse-power inches in diameter incline iron joints lamp Lancashire boiler length lever lift load Longwall lower means method motion pass pillars pipe piston placed plates pressure props pulley pump quantity of air revolutions per minute riveted road roadway rock rods roof rope round safety-lamps screw shown in Fig side South Wales sprags square inch stall steam steel strata stroke surface temperature thick timber tons tube tubs underground valve velocity ventilation vertical water-gauge weight whilst winding wire wire rope yards دو
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