Mining: A Journal Devoted to the Interests of Mines and Mining Students, Volume 11893 - Mines and mineral resources |
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Common terms and phrases
advantages airway allow Answer to Question atmosphere Barnsley Bedlington boilers boring bottom cage carbon carbonic acid Carboniferous centre Clarence Yard coal measures coal seams coalfield colliery commenced COMPETITION crib cubic feet cylinder depth dial diameter distance district drum Durham endless rope engine explosive fire fire-damp fixed FORTNIGHTLY ONE PENNY friction furnace gases give hauling heat hole inclination iron JOHN GRAY Journal length lever load lode longwall mercury metal method Millstone Grit mineral nitro-glycerine Northumberland ordinary oxygen passing pillar pipe piston pressure prize props pulley pump quantity rails readers rock rods roof round safety lamp shaft side sinking sketch specific gravity square inch Staffordshire steam strata stroke STROWGER surface tail rope temperature thick timber tons Tow Law trepan tube tubs underground upcast valve velocity ventilation Walker-on-Tyne Wallgate water gauge weight Wigan winding wire yards deep
Popular passages
Page 156 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Page 156 - Change of motion is proportional to the impressed force, and takes place in the direction of the straight line in which the force acts.
Page 150 - In every working approaching any place where there is likely to be an accumulation of explosive gas, no lamp or light other than a locked safety lamp...
Page 171 - The amount of heat thus developed would be equal to that derived from the combustion of fourteen globes of coal, each equal to the earth in magnitude. And if> after the stoppage of its...
Page 221 - An adequate amount of ventilation shall be constantly produced in every mine, to dilute and render harmless noxious gases to such an extent that the working places...
Page 207 - ... such report shall be recorded without delay in a book to be kept at the mine for the purpose, and shall be signed by the person who made the inspection.
Page 198 - In the case of places in which watering would injure the roof or floor unless the explosive is so used with water or other contrivance as to prevent it from inflaming gas or dust or is of such a nature that it cannot inflame gas or dust...
Page 156 - To every action there is always an equal and contrary reaction ; or the mutual actions of any two bodies are always equal and oppositely directed.
Page 198 - Act, or which is dry and dusty, no shot shall be fired except by or under the direction of a competent person appointed by the owner, agent or manager of the mine...
Page 137 - ... yards, or if there is not room for a person to stand between the side of a tub and the side of the plane, then (unless the tubs are moved by an endless chain or rope) at intervals of not more than ten yards.