Tunnel
Use the tools on the Mining | Development Drilling tab, in the Tunnel group, to add tunnels and create and edit the rounds.
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Click Add Tunnels (form) to add tunnels by specifying a String File containing tunnel strings and Wireframe Type containing tunnel wireframes.
                                                    
                                                 
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Select Add Tunnels to interactively select the centrelines and the boundary wireframe solids that will be used to generate tunnels.
                                                 
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Click Create Tunnel Round to create a new round on a tunnel.
                                                 
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Click Replicate Round (Many) to replicate the selected round along the tunnel multiple times.