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26.03.2019 (2584 Clicks)

Agreement with Kalium Lakes: K+S secures Access to Potassium Sulfate in Australia

• Agreement to purchase up to 90,000 tonnes of potassium sulfate a year possibly starting 2021
• Distribution of specialty fertilizer planned in Australia, Asia and Oceania
• Agreement supports Shaping 2030 Group strategy

23.03.2019 (3537 Clicks)

Vale informs on the Extraordinary Independent Consulting Committee for Dam Safety

Engineer Pedro Repetto was integrated to the Committee

23.03.2019 (4131 Clicks)

Cimic´s UGL secures Karratha Gas Plant Contract

Cimic Group company UGL, as part of a joint venture, has been awarded a new contract for services on the Woodside Energy Limited operated Karratha Gas Plant (KGP).

23.03.2019 (2725 Clicks)

Vale Updates on Barão de Cocais Dam in Brazil

On Friday (22/3), Vale launched the protocol to initiate level 3 of the Mining Dams Emergency Action Plan (PAEBM) for the Sul Superior Dam at the Gongo Soco mine, in Barão de Cocais (MG), Brazil.

23.03.2019 (3892 Clicks)

Strabag: Financial Close of its project “Autopista al Mar 1” in Colombia completed

• USD 713 million project financing
• Seven international and one national bank are participating in the transaction

21.03.2019 (3409 Clicks)

bauma 2019: Continental makes Drivers’ Cabs digital – and Machine Operator’s Lives a whole lot easier“

• World premiere – the digital generation of the ProViu 360 camera system increases driver comfort and safety in construction and mining vehicles
• Displays for every need – bright, rugged and in three different sizes
• The modular driver’s workplace (mDWP) gives drivers the right information at exactly the right time

19.03.2019 (2679 Clicks)

Milestone for hard Rock Tunnelling: Final double Breakthrough Follo Line in Norway

The construction of Norway's longest railway tunnel marked a breakthrough for the use of tunnel boring machines in hard rock tunnelling. In Scandinavia long rail tunnels have hitherto been drilled and blasted rather than bored. In the Follo Line Project, the tunnel boring machines made a convincing case for themselves all the way through the extremely hard Norwegian rock. Four tunnel boring machines (TBMs) by Herrenknecht worked simultaneously to excavate the main part of two 20-kilometer railway tunnels between Oslo and Ski. On February 26, 2019, the final double breakthrough of the Double Shield TBMs 'Anna' and 'Magda' successfully completed the challenging mission and drew a spectacular close.

18.03.2019 (4014 Clicks)

Cimic's Thiess wins Contract in Botswana

Cimic Group’s global mining services provider, Thiess, through Majwe Mining Joint Venture (Majwe), has secured a A$1.7 billion contract at Debswana Diamond Company’s Jwaneng Mine Cut 9 project in Botswana.

14.03.2019 (3714 Clicks)

Rail Museum turns Spotlight on Role of Fugro’s geotechnical Expertise in HS2

Soil samples in the laboratory may seem a world apart from the gleaming high tech of the high speed train. Yet both share the spotlight in a current exhibition at the National Railway Museum in York giving a rare insight into the role of testing and prototyping in pushing the boundaries of rail engineering.

14.03.2019 (3321 Clicks)

Robbins EPB and Conveyors complete complex Lot 5 at Emisor Oriente in Mexico

Powerful TBM proves itself in both soft ground and hard rock

On February 28, 2019 a ceremony was held to mark the breakthrough of a machine proven in both soft ground and hard rock. The 8.93 m (29.3 ft) diameter Robbins EPB and continuous conveyor system completed what is arguably one of the most difficult legs of the complex Emisor Oriente tunnel, an epic 62 km (39 mi) long conduit that will revamp wastewater treatment for more than 21.2 million people in Mexico City.

The 6 km (3.7 mi) long Lot 5, one of six lots at Emisor Oriente, required the Robbins machine to be launched from the deepest civil works shaft in Mexico, at 150 m (492 ft), and excavated mixed face conditions as well as abrasive basalt rock. “I am proud of concluding the excavation successfully given that this is the section with the greatest depth on the project,” said José Adolfo Méndez Colorado, Superintendente de Maquinaria for contractor Ingenieros Civiles Asociados (ICA). “Robbins Field Service had an important contribution in satisfactorily concluding this section. The machine operation was of primary importance: Field Service personnel know how to operate the equipment accurately for favorable results. The speed with which they detect a problem is a favorable point to reduce downtime on the excavation.”

The complexity of the ground conditions, continued Méndez, required the correct concentration and selection of polymers, a large challenge in itself. Field Service assisted with other issues and with equipment operation: “There were some issues with the screw conveyor conveying mixed ground and also in the articulation system, which were overcome with Field Service experience. They also knew the correct operation of the continuous conveyor system, which kept us to expected performance.”

“We are very proud of this machine as it has worked in two very different worlds,” said Roberto Gonzalez, General Manager for Robbins Mexico. In 2011 the machine originally slated for Lot 5 was fast-tracked to bore a 3.9 km (2.4 mi) long section of Lot 1b—a critical part of the line that needed to become operational right away to prevent chronic seasonal flooding. “The EPB proved itself while using conveyors in the sticky clays of Mexico City with very high percentages of water content, up to 400%.” The machine achieved rates of up to 592.5 m (1,944 ft) in one month—considered a record among the six EPBs (three of them Robbins) used on the project. After completing the bore in just 15 months, the machine was sent to the Lot 5 site, where modifications were made for a section of mixed ground and rock.

Modifications included a high-pressure man lock capable of withstanding 7 bars, chromium carbide wear plates added to the screw conveyor, and grizzly bars added to the cutterhead along with heavy duty cutting tools.

The machine was assembled in a 28 m (92 ft) long assembly chamber at the bottom of the launch shaft and commissioned in August 2014, requiring all back-up gantries to remain at the surface. Two months later in October 2014, after advancing 150 m (492 ft), the machine and its back-up gantries were completely assembled in the tunnel. One month later, the continuous conveyor system was installed and running. “The assembly of the EPB at Lot 5 has the record of the deepest assembly of a TBM in Mexico. It required great coordination of ICA engineers, high capacity cranes for the assembly and human resources in order to keep to the ten-week schedule for assembly,” said Gonzalez.

With tunneling at Lot 5 now officially concluded there is one more breakthrough remaining before the Emisor Oriente line is complete: An 8.93 m (29.3 ft) Robbins EPB operating at Lot 4 is scheduled to break through this spring. A third Robbins EPB operating at Lot 3 completed its tunnel in 2018.

The Túnel Emisor Oriente (TEO) is the answer to more than 100 years of sinking in Mexico City as the result of drained lake beds and general lowering of the water table. The city’s buildings, main streets and other structures have sunk more than 12 m (39 ft) in that time, and much of the area is vulnerable to flooding. At the same time the area’s gravity-fed wastewater lines have lost their slope and are severely under capacity.

Once tunneling is complete, the resulting TEO will expand capacity, adding 150 m3/sec (5,297 ft3/sec) to the Valley of Mexico system, as well as alleviating the risk of flooding in critical areas. It will also convey wastewater to the country’s largest wastewater treatment plant. The massive tunnel includes 24 shafts, ranging from 23 to 150 m (75 to 492 ft) in depth, plus an exit portal at the treatment plant in the Municipality of Atotonilco, in the state of Hidalgo.

Source: The Robbins Company