PART V MINE PLANS AND SURVEYS AND PEG INDEX REGISTERS
5.1 (1) The mine manager shall ensure that the following plans are kept and maintained in respect of the mine, namely -
(a) a mineral rights plan drawn to any convenient standard natural scale, showing -
(i) the mineral rights holdings in relation to any surrounding farm boundaries;
(ii) the survey stations used for the origin of the mine survey;
(iii) the survey system and the co-ordinates of the mine survey origin used;
(iv) the bench mark, its co-ordinates and elevation and a full description thereof;
(b) a surface plan, showing -
(i) any perimeter of opencast workings;
(ii) any shafts and accesses to underground workings;
(iii) any subsidence and cavities resulting from mining operations;
(iv) any buildings, sub-stations and explosives magazines;
(v) any roads, railways and haulage ways;
(vi) any power transmission, telephone and main pipe lines;
(vii) any tailings dams, ore stockpiles and waste dumps;
(viii) any reservoirs, dams, water courses and water boreholes;
(ix) the bench mark and main survey stations;
(x) any main surface contours;
(xi) any other main surface features.
(c) a mine workings plan of each bench in opencast workings and of each level in underground workings, showing -
(i) the elevation to which each plan refers;
(ii) the outline and the names of any workings;
(iii) any main survey stations with their numbers and elevations;
(iv) any areas in which mining operations have been restricted;
(v) any major geological faults and dykes;
(vi) any explosives magazines;
(vii) any reservoirs, dams and other structures constructed to withstand a pressure of water or other material which will flow when wet or to control an inrush of water;
(viii) in the case of underground workings, permanent supports and the heights of workings or stoping widths sufficient in number to be representative of the workings.
(ix) any other main features;
(2) Where different veins, lodes, reefs, mineral beds or deposits overlie each other or are worked a second or successive time, the workings of each such vein, reef, lode, mineral bed or deposit shall be shown on a separate plan.
(3) Where an orebody is worked by opencast methods the bench plans referred to in sub-regulation (1)(c) may be replaced by a composite plan which may be incorporated into the surface plan and which shall then be called a general plan.
(4) Where an area held under mineral rights is large in relation to the area under mining operations, surface plans referred to in sub-regulation (1)(b) may be prepared only in respect of such areas where mining operations are or have been carried on.
General requirements of plans
5.2 (1) Any plan referred to in regulation 5.1 shall -
(a) be drawn on good quality transparent draughting material in black ink and / or CAD prints.
(b) except as provided in regulation 5.1(1)(a), be drawn to a standard natural scale and be so prepared that they are to the same scale and can be superimposed one upon the other;
(c) show an accurately drawn scale, at least 100 millimeters long and suitably subdivided;
(d) show the direction of true north;
(e) show co-ordinate grid lines not more than 200 millimeters apart with numerical values at both ends of the lines;
(f) show a subject heading which shall consist of the name of the plan, the mine and the magisterial district in which the mine is situated;
(g) bear the identification number assigned to it by the Chief Inspector;
(h) observe such conventions as may be determined by the mine manager which shall be indicated in a legend;
(i) show the date of measurement of the position the working has reached;
(j) show on an inset key plan, drawn to any convenient scale, the area covered by the relevant sheet in relation to the other sheets comprising the plan.
(2) The Chief Inspector may require by notice in writing to the mine manager such additional details to be shown on the plans required to be kept under these regulations or the preparation and maintenance of such other plans or sections as he or she may specify in such notice.
(3) Except as provided for in sub-regulation (6), any plans for underground mines required to be kept under these regulations shall be maintained up-to-date within three months.
(4) Where a mine or any part thereof is proposed to be abandoned or the working thereof discontinued or rendered inaccessible, the relevant plans shall be brought up-to-date before such abandonment or discontinuance, as the case may be.
(5) A true copy of any plan referred to in this regulation, drawn on good quality transparent draughting material and / or CAD prints shall be deposited at the office of the Chief Inspector.
(6) The mine manager shall ensure that at intervals not exceeding 12 months the copies referred to in sub-regulation (5) are updated and redeposited at the office of the Chief Inspector.
(7) The copies referred to in sub-regulation (5) shall -
(a) not be away for purposes of the updating so referred to from the custody of the Chief Inspector for more than 60 days in any such period of 12 months;
(b) have a declaration made and signed by the mine manager on every occasion it is updated to the effect that the plan conforms to the requirements of these regulations, and is a true representation of the workings of the mine as on the date on which the plans were last updated
5.3 (1) Any workings, objects and the relevant features required on any prescribed plan shall be shown to be plotted from actual survey observations.
(2) Any mine surveys shall be based on the national trigonometric system or the survey system of the farm or farms on which mining operations are carried on.
(3) A bench mark shall be established in the general vicinity of the mine to which the coordinate system shall be related for plan reference.
(4) Sufficient survey stations shall be established on the surface and in the workings so that the surface features and all the workings can be surveyed.
(5) Any survey station shall be marked with a name or number in such manner that it can be readily identified.
(6) The International Standard (SI) system shall, as far as is practicable, be the unit of measure on any mine.
(7) Any elevations shall refer to a common datum which shall be mean sea level.
(8) The limits of allowable error in survey work and the representation thereof on plan are;
(a) the length of the line joining the positions of any survey station as determined by the beginning and closing of a traverse shall not exceed 0,1 percent of the length of such traverse;
(b) the error in length between any two survey stations of a traverse measured along the traverse shall not exceed 0,1 percent of the true length;
(c) the error in direction of a line between any two consecutive survey stations of the traverse shall not exceed two minutes of are with reference to the axes of co-ordinates;
(d) The error in level between any two survey stations shall not exceed 0,05 percent of the length between them;
(e) the error in special measurements, having as the object the fixing of the positions of shafts to be sunk and the establishment of connections, shall not exceed half of the limits given above.
Peg index registers
5.4 The identification name or number of each survey station together with the locality, coordinates, elevation and the back reference survey station shall be entered in alphabetical or numerical order in the peg index register.
General requirements relating to mine plans and surveys
5.5 (1) A peg index register and the plans required to be maintained under these regulations shall be kept available for inspection and maintained at every mine or at such other place as the Chief Inspector may permit.
(2) Where the Chief Inspector is of the opinion that any mine plan is not accurate or satisfactory, he or she may direct the mine manager by notice in writing to have a new plan prepared or a fresh survey made within such period as may be specified in such notice.
(3) Within 30 days after the cessation of mining operations, all prescribed plans and copies together with the peg index registers shall be handed in at the office of the Chief Inspector.
(4) A mine plan register shall be kept in the Chief Inspector's office.