Abstract
The success of a paste underground distribution system (UDS) is dependent on the proper installation, operation and maintenance of its boreholes. The boreholes that are required over the life of mine, in particular, the surface boreholes, represent both the greatest cost and risk to the UDS.
The hydraulic and operational aspects of paste boreholes has been presented in multiple publications. However, the design, installation and maintenance aspects are not widely discussed. The decision to proceed with a certain borehole design is typically based on the local project teams knowledge, or the local equipment available to drill and install the borehole infrastructure. Often time, a particular borehole design is selected without a complete understanding of the later operational and maintenance challenges that will arise from the design decisions.
This paper will cover the major design, installation and maintenance aspects of paste boreholes. The purpose of the paper is to present both advantages and disadvantages of the various design options so that the reader may make an informed decision before implementing a particular solution for their paste project.