Direction and Grade lines:
- The Miner must clearly mark the direction line and the grade lines, as per layout. These lines to be painted in. Grade sidewall pegs to be installed (never to use chain grades in any decline shaft) at a maximum distance of 30m from the face. Please see Figure 1for
- details.
- In addition to the direction line and grade lines the following limit lines to be painted in.
- Sidewall- Top and bottom limit lines to be painted in with marking paint, both side of the sidewalls.
Drop Sets:
- Install a drop set at the brow of the bank, which will function manually with a counter weight.
- When the skip is pulled to the tipping position, this drop set should be closed.
- The drop set at the bottom of the sinking shaft must not be further than 15m from the bottom. This drop set must be closed at all times except when opened for the skip to move through the area of the drop set. This drop set will also be manually operated by means of a counter weight.
Permanent Rails:
- Permanent rails to be kept at a maximum distance of 12m from the advancing face.
- Sills are to be spaced at 1.Sm apart and secured by means of bullhorns to the sidewall on either side. It is important to drill the holes for the bullhorns at the correct distance below the grade line as to ensure that the rails will be positioned in the correct position according to the survey lay-out.
- Rail lengths are to be determined by the specific shaft requirements.
Temporary Rails:
- A single jump-set with sliding rails will be used in the decline shaft. The length of the jump and the length of the sliding rail will be determined by the specific shaft requirements.
- A cubby must be developed every 20 meters to act as waiting place for the employees when hauling operations are conducted. The lock bell must be positioned at the lowest position of the ladder way.
- Full length rails being used as sliding rails and slides forward as loading commences (manually)
Temporary Rails:
- Once the jump-set and the sliding rail have reached a distance of a minimum 7.Sm and maximum of 9 meters, a new length of rails be installed (as determined by the shaft requirements). You turn around the sliding rail and install it as a permanent rail.
- The Skip will be at rest on the bank or the station when drilling is in progress.
- Bank/station drop rails (or drop sets) must be in a horizontal position (closed position) as the skip rests on station/bank. (If no bank area or station are is available, skip must be fastened/secured by means of a sling to the head gear construction)
- The shaft bottom water arrangement is done by means of pumps.
- Shaft bottom (face) barred and declared safe by the miner who signs the Sub-incline
- Safe Declaration book. This book will be kept on record for a period of six (6) months.
- Daily sketch of all sockets must be kept indicating the position and length of the sockets and also the round marked off.
- The bottom two (2) rows with lifter plugs. This is mandatory when sinking at 38 degrees or more.
Temporary Rails:
- The support standard will apply as per SOP1{determined by the shaft requirements)
- Appointed miner to mark of the face and commence with the drilling.
- Blasting takes place at blasting time as per the blasting schedule.
- Equipping (services) shall not be further than 20 meters from the face.
Only pre-stressed mine poles (with jackpots on both ends) must be used for all travelling way barricades.
Dimensions of Decline Shaft will be determined by the shaft requirements
Ventilation:
- As pre-scribed by the approved ventilation layout.
- The environmental department must inspect the ventilation regularly.
Travelling Ways:
- A handrail must be provided for the entire length of the traveling way.
- No obstructions are allowed on the steps.
- Stepladders to be extended to ensure they are within easy reach.
- Travelling way dimensions to be kept correct.
- No persons to be transported by an unlicensed winder.
When constructing a ladder way between 30 and 55 degrees, the ladder way must be equipped with ladder breaks not exceeding 15 meters.
General Requirements:
Spillage must be cleaned regularly to prevent the skip from derailing due to spillage.
Regulation 16.81& 16.82 concerning the Winding Engine Drivers logbook must be complied with. A standard winding engine drivers’ logbook will be made available for the winch operator to complete on a shift-to-shift and daily basis. The duplicate copy of the day’s events shall be presented to the Engineer for scrutiny and action shall be taken on any anomalies reported.
Round to be used in sinking procedure:
- This will be determined by the shaft requirements.
EQUIPPING
Fairview Mine:
- Shaft to be equipped with 30Kg rails
- Sills to be installed 5m apart.
- 30 Kg Drop rail to be installed on bank area and at every station as shaft progresses.
- 15Omm Air column.
- 100 mm Water column.
- 100 mm pump column.
- 760 mm Ventilation exhaust column on conveyance side.
- 570 mm Ventilation force column on conveyance side.
- Exhaust fan- to be determined by Environmental Department.
- Force fan- to be determined by Environmental Department.
- 152mm X 152mm X 13mm Universal (1-beam) drop set.
Universal column (1-beam) creeping sill boxed with 42MPA cement every 20 meters.
Galvanised mesh wire on travelling way side (separating travelling way from conveyance compartment)
- 9m Sliding rails.
- Chain ladder with chain handrail must be installed at bottom of travelling way- this will be from the permanent travelling way to the decline face.
- A handrail must be installed over the entire length of the travelling way.
- Sills are positioned one (1) under every rail joint with five (S) spaced in between (1.5m apart) totaling seven (7) sills per rail.
- Rail gauge will be determined by the shaft requirements.
New Consort Mine and Sheba Mine:
- Shaft to be equipped with 22Kg rails
- 200mm x 15Omm x 2.4m Sills to be installed 2.5m apart.
- 22Kg Drop rail to be installed on bank area and at every station as shaft progresses.
- 100mm Air column.
- 5O mm Water column.
- 5O mm pump column.
- 760 mm Ventilation exhaust column on conveyance side.
- 570 mm Ventilation force column on conveyance side.
- 22Kw x 760mm Exhaust fan.
- 11Kw x 570mm Force fan.
- 152mm x 152 x 13mm universal (1-beam) drop set.
- 152mm x 152mm x 13mm Universal column (1-beam) creeping sill boxed with 42MPA cement every 20 meters.
- 4mm Galvanised mesh wire on travelling way side (separating travelling way from conveyance compartment)
- 7.5m Sliding rails at Consort mine and 9 meter rails at Sheba mine.
- Chain ladder with chain handrail must be installed at bottom of travelling way- this will be from the permanent travelling way to the decline face.
- A handrail must be installed over the entire length of the travelling way.
- Sills are positioned one (1) under every rail joint with two under each rail spaced 2.5 meters apart totaling four (4) sills per rail.
- Rail gauge is a standard 610mm; except for Sl 21 where it is 910mm
LANDING BREAKAWAYS
- Station breakaways are developed from shaft face only- shaft face is not allowed to advance past the station position unless the station cross cut is advanced for not less than five (5) meters. Only then can shaft sinking re-commence.
- Sink shaft to a distance of eight (8) meters past the station hanging wall apex.
- Reinforce the apex by using pin steel from sidewall to sidewall. Pin steel must overlap at least 200 mm. Then only can bull nose be boxed and filled with 42mpa cement. (Follow manufacturer’s instructions)
- Follow the cross cut breakaway standard as stipulated in SOP 1.
SHAFT LOADING BOXES
- Box hole breakaways to be done as shaft advances.
- The shaft will not advance further than ten (10) meters before the box hole breakaway is done and the box construction completed.
- The support standard and development standards for box hole breakaways and box hole development will be conducted according to SOP 1.
EMERGENCY CONVEYING OF INJURED PERSONS
The following procedure will be applicable whenever it becomes necessary to convey an injured person in a shaft being sunk:
- Ring 10- required area signal (to inform driver of the injury)
- By means of a lock bell system, position the conveyance in relation to the injured person.
- Place the injured person in the conveyance in such a manner as to ensure that no body parts protrude from the conveyance.
- Position persons at not more than 30-meter intervals on traveling-way side (to warn the bell operator by means of a pea whistle of any obstructions) to ensure safe passage of conveyance. The bell operator will remain at the bell at shaft bottom until the conveyance has arrived on the bank.
- Remove injured person from conveyance, mobilize injured person and follow SP 03 – Disaster Action Plan.
