Nearly 75 miners representing almost 25 global companies were recently given an inside look at Cat® technologies for mining during a two-day Mining Technology Demonstration & Program at the manufacturer’s Tinaja Hills Demonstration & Learning Center near Tucson, Arizona.
Hosted by their Cat dealers, attendees saw a customized technology demonstration that featured Cat autonomous trucks and dozers working alongside manned vehicles. The program also included in-the-iron time as well as presentations on Cat MineStar™ delivered by technology leaders and subject matter experts. MineStar is a suite of offerings for the mining industry that are part of the company’s Cat Connect family of technologies and services.
AUTONOMOUS LOADING AND HAULING
The autonomous loading and hauling portion of the demonstration featured three autonomous Cat trucks being loaded by a Cat 6060 Hydraulic Shovel. The 793Fs, equipped with Cat Command for hauling, were being controlled from the new MineStar Command Center located on the demonstration site.
The shovel operator was using Cat Terrain for loading, a machine guidance system, to set the spot point for the autonomous truck and tell the truck when to leave. The in-cab Terrain screen lets the loader operator “see” the truck — where it’s currently located, where it will be traveling next, the payload it’s carrying and even the grade of ore in the bed.
After being loaded, the autonomous truck headed to the dump site, where a pre-programmed script directed the truck to slow as it neared the ledge, stop when it reached the berm, raise the bed, wait a predetermined time to allow the material to sheet, and then drive away while lowering the bed. Attendees learned that the timing of this sequence can be adjusted for different conditions. For example, if conditions were wet and the material was sticky, the script could be written to allow more time for the load to dump from the truck.
The autonomous truck also encountered several hazards on the roadway to showcase some of Command’s safety features, such as the Lidar system located on the front of the truck. This system contains 64 lasers that gather millions of data points every second, giving the truck a rich view of its environment. During the demonstration, the truck came to a complete stop when it identified a light vehicle and a mannequin that were placed in its path on the haul road.
The program also demonstrated an “A-stop” or “all-stop” — a device carried by personnel on site that will stop all trucks within 300 meters (984 feet). One audience member had the opportunity to demonstrate the A-stop controller, stopping the autonomous truck at the push of a single button.
During the demonstration, attendees also heard about expansion plans for the Command for hauling product. While the 793F is the flagship autonomous truck, with more than 60 in operation around the world, Caterpillar is expanding Command to work on Cat 789D and 797F trucks as well as machines from other manufacturers, such as the Komatsu 930E-4SE.
While manned and autonomous trucks traveled the haul road from the shovel to the dump site and back again, an autonomous Cat D11T Dozer equipped with Command for dozing worked alongside them during the demonstration, pushing dirt for the shovel to dig and load.
The demonstration included two types of automated dozing — line-of-sight remote control and non-line-of-sight operation from the Command Center.
The line-of-sight control is delivered by an over-the-shoulder console designed for short-duration activities like cleaning up under highwalls or stabilizing slides. During the demonstration, the operator stood near the top of the grandstand where attendees were seated, operating the machine using controls that are identical to what he would be using in the cab.
The remote operator station enables the operator to work from a comfortable, seated position — also with familiar dozer controls — and is ideal for full-shift operations. A live feed to the grandstand allowed attendees to see the dozer in action while also watching the operator in the control center, where he had access to a complete picture of the machine’s working environment delivered by high-definition cameras and a microphone mounted on the machine.
While not shown during the demonstration, the presentation included information on semi-autonomous dozing, which uses the remote operator station to allow a single operator to take command of multiple dozers while located across the mine site, or even across the world.
Command Center Autonomous operations at the demonstration site are controlled from the MineStar Command Center, where visitors can view live feeds of demonstrations, watch videos, and access information on interactive touch tables.