engine – and is only needs to be done relatively briefly, compared to mining, as tramming distances are usually short. He maintains his view, though, that given the trend


toward BEVs that in about 10 years or so almost all new tunneling drills will be such types of vehicles, he tells TTNA. As noted before, key driver will be in how contractors look at the total cost of ownership (TCO) of BEVs against diesel equipment, for that comparison would change perspectives. In mining and tunneling, he says, BEVs need less maintenance, and electric grids are in place underground allowing ongoing charging, as drilling is underway so saving time. Another trend that continues is remote training, which


was given impetus during the restrictions on travel and contact during the Covid pandemic. To that end, Sandvik has its Digital Driller package. A BEV development drill for mining – but can be used


in tunneling, with boom changes – is the company’s DD422iE. While the DD322i has been added to the development drill family, being a more compact rig and focused on potential to excavate smaller tunnels, it has a low emissions diesel engine. However, it can be fitted with engines certified to more restrictive environmental standards.


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