Fundamental to ORIGINAL TECHNOLOGY's success is its culture of providing cutting edge services and products. We thrive on strategic planning, flawless logistics planning, human capital training, project management, risk management and quality assurance.
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We promise a strong business foundation to deliver greater efficiency, sustain and improve compliance to customer satisfaction, while meeting our key objectives of quality, accuracy, time and cost. Each assignment begins with a thoughtful research, intelligent deduction and collaboration with our clients. We are known for undertacking complex , brand-driven, collaborative, multi-disciplinary projects and we pride ourselves on seeing them through.
Our co-business is to manufacture and supply a wide array of mining and mechanical equipment and accessories.
ORIGINAL TECHNOLOGY has rubbed shoulders with other international mining and mechanical engineering companies to provide holistic solutions to the South African mining industry. The organisation also offers extensive training to customer representatives on product handling and benefits to ensure efficient and trouble-free use.
Original Technology has a laboratory for tensile testing of steel. This is for quality assurance purposes and the service is also offered to mines to check quality compliance of bolts from other suppliers. Tensile Testing is a fundamental materials science test in which a sample is subjected to a controlled tension until failure.
Properties that are directly measured via a tensile test are ultimate tensile strength, maximum elongation and reduction in area.
From these measurements the following properties can also be determined:
1. Young's modulus,
2. Poisson's ratio,
3. Yield strength,
4. Strain-hardening
Uniaxial tensile testing is the most commonly used for obtaining the mechanical characteristics of isotropic materials.
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Shepherd’s crooks - used as a primary or secondary support and may be used in conjunction with meshing and lacing where required comprises of a high tensile steel rebar cut to the required length and bent on one end resemble a hook. This mechanism provides passive support. Bonded on to the rock by grouting cement.
| Bar Size | Bar Type | Typical Yield Strength (kN) | Typical UTS (kN) |
| Y18 | Deformed | 150 | 180 |
| Y20 | Deformed | 160 | 200 |
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Tendon used to support fractured ground between rock anchors by providing a continuous mesh between the anchor points comprises of 5 strands of high tensile partially malleable steel of 5mm thickness held together by 3mm steel strands across. These are manufactured at 3m lengths. These straps are used in conjunction with rock bolts and they provide passive support.
Cable anchors are flexible high-tensile steel strands of specific lengths, anchored inside a drilled hole by mechanical expansion shells. They have a load bearing capacity of 25-40 tonnes depending on the number of strands and thickness of the strands.
| Strand Diameter (mm) | Ultimate Tensile Strength (KN) | Pre-Stress Load (KN) | Shell Diameter (mm) | Hole Diameter (mm) |
| 15.24 | 250 | 100 | 35 | 38 |
| 18 | 400 | 150 | 38 | 42 |
Mechanical shell end anchored bolts are used to provide active long term support on the rock. The 3-leaf expansion shell has exclusive features that ensure positive anchorage under the most arduous conditions. The expansion shell unit is manufactured as a ‘bail type’ unit i.e. 3-leafed mechanical anchor which conforms to the hole diameter. This feature ensures a more even load distribution between the anchor and the rock at the anchor point. The mechanical shell anchored bolt is manufactured as per the customer's specifications.
MineCrete S³ is a combination of exclusive innovative technologies incorporating specialized concrete formulations and polypropylene fiber. Due to its mechanical properties superior to the conventional shotcrete with MineCrete you can reduce the current thickness of the shotcrete in half.
The Figure illustrates the best set up and possible failure locations in the tensile bond strength testing. MineCrete was poured onto rock subtrate (norite) by making use of a 5mm thick Perspex glass with a 35mm diameterhole. Removal of perspex glass leaves behind uniform MineCrete thickness and does not necessitate any overcoming process.
A steel dolly was glued normal to the MineCrete thickness and does not necessitate any overcoming process. A steel dolly was glued normal to the MineCrete surface with a strong epoxy, or resin that was commercially available. After the hardening of epoxy, the tensile bonding was measured by pulling the dolly away from the rock substrate. The loading of MineCrete was done by load crontrol method and the rate was the same as the one used in tensile strength testing that was 0,005kN/s.
The test continues until the MineCrete material was detached frm the rock substrate while load and displacement were recorded. (H. Yilmaz)
When shotcrete is used as an integral part of a mine's ground support system, it is important to know the strength properties of the in place shotcrete.
Besides conventional strength parameters, such as the shotcrete's flexural, compressive, or tensile strength, the adhesion or bond strength of the shotcrete to the host rock must also be known in order to adequateley determine the shotcrete's ability to support the immediate ground near the surface of the mine opening.
Consequently, the adhesion strength of the shotcrete is a necessary parameter for ground support design.
Two basic types of shotcrete failure modes.
A: Fallout of only shotcrete indicating poor adhesion;
B: Fallout of shotcrete and rock indicating zones of weak rock (after Malmgren & Svensson, 1999)
Our SHEQ policies are a non-negotiable standard that should be adhered by all workforce, management and involved parties. Original Technology has put in place strategies to assess, manage and control operational risks throughout the operations. Safety Toolbox Talks are held to educate and inform employees on the safety issues. Training is focused on the safe execution of all activities whether in office or on-site basis.
We take pride in employing competent personnel for quality deliverance. All our employees undergo pre-employment medical checks to assess and assure fitness to work. ORIGINAL TECHNOLOGY’s systems are anchoured on the principles of ISO 14001, ISO 9001 and OHSAS 18001 among other legal acts.
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