Two hours allowed for this paper. VENTILATION. 1. A pair of pits, 30 yards apart, are sunk 80 fathoms deep to the lowest of four coal seams separated from one another by 10 fathoms of strata, and varying in thickness from 1' 9" to 2' 10". Dip, 1 in 4. Describe, with the aid of tke sketch plan and section, how you would lay off the workings around the pits with a view to ventilation. 2. A coal seam, 5 feet thick, dipping 1 in 2, is opened by an incline from the surface at the outcrop, it is to be driven down half a mile and is expected to yield 350 tons per day. Describe and show by a sketch how you would lay off the workings from the incline so as to secure efficient ventilation. 3. State how the following gases are detected in the air of a mine :— (1) Carbonic acid, (2) Carbonic oxide, and (3) Sulphurretted hydrogen. 4. Explain what is meant by diffusion of gases. How is it that notwithstanding diffusion carbonic acid gas is found in hollows in the floor of a mine and firedamp in cavities in the roof? 5. Describe and sketch any apparatus you know of for enabling a person to enter a smoke-laden atmosphere. One hour and a half allowed for this paper. SINKING, FITTING, AND PUMPING. 1. What are the special risks to be guarded against in starting work in a sinking shaft on Monday morning or after other long interval ? 2. Enumerate the different kinds of power employed for underground haulage and pumping; state with which you have had most experience, and specify its advantages and defects. 3. State the nature and extent of your experience with coal-cutting machinery, and the practical lessons you got from it. 4. Describe the difference between the action of a furnace and a fan in producing ventilation, and state why the fan is now so generally preferred. 5. An old shaft 12 feet by 6 feet is to be enlarged to 20 feet by 8 feet, the depth being 50 fathoms. show by drawing and description how you would do the work in ordinary metals where the water is light; and give an estimate of the time that would be required to complete it. One hour and a half allowed for this paper. WINDING, HAULAGE, AND STRENGTH OF MATERIALS. 1. Describe the construction and action of an injector for feeding boilers, and say whether or not you prefer it to a pump, and why. 2. Formerly cylinders and slide valves were lubricated by melted tallow through a tallow cup, but now it is usually done with cylinder oil through a sight-feed lubricator. In what respects is this an improvement? 3. How could you arrange a self-acting incline so that the full tubs would always come down the same side? 4. State the highest output obtained in your experience from a single shaft, and the arrangements that secured it. 5. What in your experience has been the average cost per ton for haulage : (1) By men and boys up to 600 yards? (3) By machinery for longer distances? State also in what circumstances you think it best for the miner to supply his own drawer, and in what other circumstances it is wise for the employer to pay a contractor for such work. ... One hour allowed for this paper. SURVEYING AND DRAWING. 1. What tests would you apply to a miner's compass and a measuring cnain to ascertain their accuracy? 2. Why is a triangle so called, and how mary degrees does it contain? 3. Make drawings of the different kinds of four-sided figures, give their names, and say how their respective areas are found. 4. A Canadian township, 6 miles square, is divided into 36 equal lots or sections, all being squares. State what is the length, breadth, and acreage of a quarter section. 5. Without using a protractor draw the lines of the following survey to a scale of 2 chains to an inch: N.B.-The process by which the answer is obtained must be shown. 1. A master employs 12 men at 30s. a week, 20 at 21s. a week, 26 at 17s. 6d. a week, and 16 boys at 98. 3d. a week. What will his daily wage bill amount to? 2. On a monthly output of 18,050 tons the outlays are:-For miners' wages, £3,200 14s. 2d.; timbering, £760 10s. 6d. ; surface and general charges, £852 28. Find the outlay per ton. 3. If the coal is 30 inches thick, in a long-wall place that is 60 feet long, what does the brushing cost per ton, when it is paid for at the rate of 14s. per fathom? (30 cubic feet = 1 ton of coal.) 4. A " heading" or "adit " rises evenly 75 feet in its length of 800 fathoms. What is the rise per yard? REPORTS OF ASSISTANT INSPECTORS. 4, Kirkbrae Road, Tiberton, Edinburgh, 12th March, 1907. SIR, In pursuance of Section 20 of the Metalliferous Mines Act, 1872, and Section 2 of the Quarries Act, 1894, I have the honour to report to you that, during the past year, I have exercised the duties of an Inspector of Mines and Quarries in the district of East Scotland, and that, in so doing, I have acted under the directions of Mr. Robert McLaren, the Inspector for that district. I have the honour to be, Sir, Your most obedient Servant, The Right Honourable Herbert Gladstone, M.P., SIR, E. BESSELL WHALLEY. 31, Warrender Park Terrace, Edinburgh, 12th March, 1907. In pursuance of Section 20 of the Metalliferous Mines Act, 1872, and Section 2 of the Quarries Act, 1894, I have the honour to report to you that, since December, 1906, I have exercised the duties of an Inspector of Mines and Quarries in the district of East Scotland, and that, in so doing, I have acted under the directions of Mr. Robert McLaren, the Inspector for that district. I have the honour to be, Sir, Your obedient Servant, The Right Honourable Herbert J. Gladstone, M.P., JOHN MASTERTON. TER LONDON: PRINTED FOR HIS MAJESTY'S STATIONERY OFFICE, BY DARLING & SON, LTD., 34-40, BACON STREET, E. 1907. MINES AND QUARRIES. REPORTS OF J. M. RONALDSON, H.M. INSPECTOR OF MINES FOR THE WEST SCOTLAND DISTRICT (No. 2), ΤΟ HIS MAJESTY'S SECRETARY OF STATE FOR THE HOME DEPARTMENT, UNDER The Coal Mines Regulation Acts, 1887 to 1896, the Metalliferous Mines Regulation Acts, 1872 and 1875, and the Quarries Act, 1894. For the Year 1906. Presented to both Houses of Parliament by Command of His Majesty. PRINTED LONDON: FOR HIS MAJESTY'S STATIONERY OFFICE, BY DARLING & SON, LTD., 34-40, BACON STREET, E. And to be purchased, either directly or through any Bookseller, from 1907. |