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Master Drilling case studies 5

CASE STUDIES AND PROJECTS

Our track record speaks for itself...

We provide specialised drilling services to blue-chip, major and mid-tier companies across a number of commodities
and sectors.

MINING

INFRASTRUCTURE

ENERGY

INFRASTRUCTURE: RIO UNDERGROUND METRO
Rio de Janeiro

CHALLENGE:

Extension of the Rio underground metro, requiring three new ventilation shafts (two 4.1m in diameter at a depth of 100m, and one 5m in diameter at a depth of 100m)

RESULT:

  • Project completed on time, within budget and without deviation
  • 100% safety record achieved during the duration of the project

SOLUTION:

Master Drilling addressed the following project challenges:

  • Pilot holes had to be drilled without deviation
  • Restricted access to site was resolved through the construction of custom-made ramps so that drilling machines could be transported to the appropriate areas
  • Operating hours were reduced to between 08:00 am and 22:00 pm, and noise levels had to be kept to a minimum as a result of surrounding residential areas
  • Effective stakeholder engagement with all parties involved and an emphasis on effective environmental management procedures

PROJECT STATS:

Type of drilling typeRaise boring
MachineRaise bore rig 009H
Excavation depth (m)3 x 100m holes
Diameter2 x 4.1m
1 x 5m
GeologyCompetent
ContractorOdebreght
Project OwnerRio Metro
ENERGY: ITUANGO HYDROELECTRIC PROJECT
Colombia

CHALLENGE:

A 47° hole with directional drilling (staying within a 0.50cm radius) had to be achieved for the first time

RESULT:

  • Despite project start delays outside of Master Drilling’s control, the project was completed five months ahead of schedule

SOLUTION:

Master Drilling addressed the following project challenges:

  • Master Drilling embarked on the project, servicing the country’s largest hydroelectric project when it reaches full operation, producing up to 2.4GW
  • The total scope was 2462m (2131m x 4.1 diameter x 90° and 331 m x 2.4 diameter hole with a 47° inclination, drilled with directional drilling)

PROJECT STATS:

Type of drilling typeDirectional drilling
MachineUse of 4 x 3250  DC drive machines
Excavation depth (m)1 x 331 m x 47° x 2.4 m diameter  and holes between 127 m x 90° and 80 m x 90° x 4,1 m diameter
Diameter2,4 diameter and 4,1 diameter
GeologyRock conditions: between poor and good formations.
Project OwnerConcorcio Ituango
MINING: LONMIN ROWLAND SHAFT
South Africa

CHALLENGE:

Completion of 4.5m diameter x 985m length at 90º shaft with ground hardness between 200 MPa and 250 MPa. There were a slight deviation of 350mm

RESULT:

  • The project was completed on budget, within stipulated time frames
  • 100% safety record achieved
  • Three local community members formed part of its drilling crew

SOLUTION:

Master Drilling addressed the following project challenges:

  • Work had to continue amid a six-month mine strike
  • Lading had to take place via the funky slide method - this is where rocks are loaded with a winch onto a belt and then carried over into a hopper in order to be transported out of the mine

PROJECT STATS:

MachineRaise boring machine
Excavation depth (m)985m
Diameter4.5m diameter
GeologyHard rock
Project OwnerLonmin
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