Gold Fields brings WingtraOne on board to survey its stockpiles and sites
Since 1887, Gold Fields mining company has been growing and evolving its gold and mineral exploration business across Africa, Australia and South America. Two of its gold mines—Tarkwa and Damang—operate in Ghana. Since gold is measured by the ounce, managing its excavation and measuring stockpiles is a sensitive undertaking.
Gold Fields Ghana Ltd. has relied on drone data for the past few years as a way to collect site information and stock volumes over larger areas, faster and more accurately than terrestrial methods. Through experience with classical fixed-wing drones, survey managers discovered the power of rapid, wide-coverage data collection.
During the inception of the company’s drone program, there were several limitations these systems presented, including belly landing—which threatened the payload and drone unless the landing was planned on a wide, soft surface, which was time consuming to find. For this reason, surveyors at Gold Fields Damang and Tarkwa mine sites have recently upgraded to vertical take-off and landing (VTOL) technology by investing in two WingtraOne drones.
Headline image of Gold Fields Ghana Ltd. Damang mine credit: Enock4seth, Wikimedia Commons
- Mine or quarry monitoring and operation planning, Stockpile volumetrics
- Ghana
With WingtraOne, we can take off anywhere. So now I don’t need to drive a distance before I do my flight, compared to the previous drones we were using where we had to map in fragments.
Ebenezer Owusu Dapaah
Unit Manager-Survey, Damang Mine, Gold Fields Ghana Ltd.
Streamlining survey workflows for two massive goldmines
The Tarkwa mining site measures 20,800 ha (210 km2), and the Damang site measures 8,111 ha. (81.11 km2). Every quarter, the teams at these sites must map the entire area. Tarkwa borders two villages. The company is able to monitor how the villages are expanding and if they are growing into the mining area. They also measure their storage facilities and get an overall sense of all operations on the mine site.
“Previously we were using UX5 and now we realize we have constraints with landing spaces,” said John Adjaye, Unit Survey Manager at the Tarkwa mine overseen by Gold Fields Ghana. “With WingtraOne we are not constrained by landing spaces, because we are in a very heavily dense vegetation zone and flying the UX5 is a challenge as you always have to map from one or two spots. So WingtraOne gave us relief around mapping the concession.”
The quarterly concession survey takes about a week with WingtraOne. Over the rest of the time, the survey teams at Tarkwa and Damang mines fly smaller, weekly surveys with WingtraOne to monitor stockpiles and pits. The surveys are run with an aim for accuracy better than 5 cm (2 in), which is consistently achieved with the RX1R II payload.
We are happy with the results. We can do one flight and cover all our stockpiles. This one is such a plus, and it works well for us. We can then come down and process all of the data at a go.
John Adjaye
Unit Survey Manager, Tarkwa Mine, Gold Fields Ghana Ltd.
Improved wind-tolerance, safety and convenience
At the Damang site, Ebenezer Owusu Dapaah, Unit Manager, Survey-Damang Mine, said the team relied on an eBee before upgrading to WingtraOne. The landing area constraints were the same as they were for the UX5, and it wasn’t until upgrading that the surveyors realized how much control they could have with a mapping drone.
“We couldn’t use the eBee any way we wanted,” Dapaah explained. “But with WingtraOne, we can enjoy a very good take-off and landing spot. So long as the take-off and landing site is dry.
“We are enjoying the work. Plus, you look at the wind endurance and you can fly in 12 m/s wind. All the times I have witnessed WingtraOne flying, even in extreme wind, it still lands safely.”
Beyond this, the automation integrated into WingtraOne enables the survey teams to run thorough checks of the entire system before take-off and to see that these checks are completely performed. Take-off is not possible unless the drone is ready in terms of its motors, its camera connection and other vitals. This gives the pilots a lot of peace of mind that they are both flying safe and flying to capture the best data possible.
