Duty to keep plans.
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(2) Every manager shall specify the manner in which sup- ports are to be set and advanced and the maximum intervals to be observed on roadways between the supports, and at the face-
(a) between each row of props;
(b) between adjacent props in the same row;
(c) between the front row of props and the face;
(d) between any holing props or sprags;
(c) between chocks.
PART XI.
Plans necessary for safety.
96. (1) The following plans of the property appertaining to the mine to which they relate, on which both true and magnetic meridian shall be shown, shall be kept and brought up to date at least every six months-m
(0) Surface plan on a scale of 1 15,000, 1 13,500. 1 FILMMA DT 1:500 at the discretion of a mines officer showing-
(i) the boundaries and registered numbers of pros pecting licences, mining licences, and mining leases; (ii) the outcrops and dip of the lode or lodes or other mineral or alluvial deposits;
(iii) all open surface workings, shafts openings, bore- holes, tailing and other dumps;
(iv) buildings, watercourses, reservoirs, roads, rail- ways, permanent tramways, clectric power lines, public telegraph and telephone lines, cableways, main pipe lines, fences and all surface objects which require pro- tection against undermining.
(b) Underground plan on a scale of 1:500, showing-
(i) all mine workings whether abandoned or in use. Portions of the mine which have been worked out shall be shown shaded or hatched;
(ii) underground dams;
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(iii) faults, dykes and important changes in the dip of the lode or mineral bed, and where the average dip of the lode or deposit is less than forty-five degrees than the horizontal projection shall also be shown on the plan, and if the average dip is forty-five degrees or more the vertical projection as well shall be included.
(c) Ventilation plan indicating the intake airways by blue arrows and the return airways by red arrows, on a senio of 1:2,500, showing the system of ventilation in the mine, in particular the general direction of the air currents, the points where the quantity of air is measured and all devices for the regulation and distribution of the dir. All ventilation doors, toppings, air crossings, fire dams or seals, and regulators and all telephones and ambulance stations shall be shown in accordance with the symbols approved by the Superintendent of Mines. (d) If required by the Superintendent of Mines, an electrical installation plan showing on a sente of 1 12,500 the position of all fixed electrical appliances in the mine other than telephones and haulage signalling apparatus. The system of cables for distribution of current is not required to be shown unless so ordered.
(2) Where, prior to the coming into operation of these regula- tions, plans of mines, as required by paragraph (1) were kept on different scales to those stipulated therein, the mines in question may continue to use the scales for parts of the mine as may be approved, if a mines officer is satisfied that they are satisfactory for all working requirements.
91. Two copies of the underground plan as required by Duty to paragraph (1) of regulation 96 duly certified as correct by the deposit manager of a mine Shall be deposited at the office of the Mines the Mines
coples with Department and shall be brought up to date at the end of each Depart- year.
ment.
08. The Superintendent of Mines may require that transverse Power of sections of the principal shafts in use in a mine shall be made, Superinten-
dent to require transverse sections of shafts.