DOT is a software solution which finds the least cost decline network serving an arbitrary number of underground access and draw points. A powerful productivity tool for underground mine design.

DOT is a software tool for use by mine planning engineers to guide the design of a near-optimal (minimum cost) network of navigable declines in an underground mine servicing a given set of access and haulage points associated with an ore body. The DOT-generated decline template minimises development plus haulage costs.

DOT finds a network of decline paths that avoids no-go regions specified by the user. It takes into account operational constraints such as decline gradient, turning circle radius, and straight sections of the declines near junctions. DOT also determines near-optimal locations for breakouts of subsidiary declines in the network, given the network topology. DOT can automatically select the best option for level access or best choice of breakout points where there are alternatives. DOT returns centreline strings of the optimal declines, and a summary report showing the selected points, and the lengths, gradients, development and haulage costs, for each link in the optimal network.

DOT includes a tool that allows the user to adjust any design generated by the program, by fixing selected breakouts and freeing others, and then rerunning the optimisation.

DOT provides a facility for viewing a 3D rendering of the optimal decline network together with any barriers.

The design can be imported into RPMGlobal’s Planning and Scheduling Solutions for viewing and further processing.

DOT uses a combination of dynamic programming, simulated annealing, and geometric optimisation techniques.