Magnet mass haul data requirements

​​

 

These three brief resources will help when collating the data needed for CEA to develop a Magnet mass haul.

​

Information to provide

​

Quantification

OPTION A – QUANTITIES PROVIDED TO CEA

• Provide a separate worksheet for each element. An element may be a linear asset, such as a road, rail embankment, drain or similar, or a discrete location, such as a pad, wind turbine foundation or borrow pit.

• Calculate quantities for each cut and fill (or subsets of these) at 20m increments or as discussed with CEA. Pads, borrow pits and spoil areas can be supplied as a bulk unit as there is normally no need to break these into increments.

• Ensure quantities are any positive number or zero. The quantities should be neat design quantities. CEA will make any required adjustments to account for bcm to ccm conversions.

• See below for a downloadable example of the format required for direct input into Magnet. If these formats are not available, please contact CEA as we have experience in manipulating data to suit.

 

OPTION B – QUANTITIES TO BE CALCULATED BY CEA

• Provide a dwg, dxf or landxml that shows the alignments and chainages of each road. If applicable, include the location of each pad, borrow or other element you would like considered in the mass haul.

• Provide a representation of the surface(s) for calculating volumes. A basic project may only have a finished surface, while others may have finished surfaces, subgrades and rock horizons. The format of this data can be a Civil3D surface, landxml surface, polymesh, 3D triangles or similar.

• If the surface is not available, an alternative is to supply sufficient information for CEA to create the surface(s). In the most basic case, that would comprise the alignment, profile and typical section. The typical section can be as simple as the road width and batter slopes.

• The above is a minimum. Discuss more complex projects with CEA prior to sourcing data.

• Provide a model of the existing surface so the design surface can be assessed against another surface to determine a volume. Ideally this is a .dwg or .dxf TIN, but it can be a landxml, points group in .txt form or point cloud in .las form.

• A coordinated aerial image of the site in .ecw format, or as a .tiff with associated .wld file, adds a lot of value. However, if this is not available, the calculation can still proceed.

​

Layout drawings

Provide a dwg, dxf or landxml that shows the alignments and chainages of each road and, if applicable, the location of each pad. This is critical as the Magnet model relies on knowing how each of the elements connect. In the case of borrow pits, an estimated chainage and estimated offset is required. This is often supported by a layout drawing in pdf format.

​

Design drawings

A full suite of design drawings will give CEA a better grasp of the project.

​

Geotechnical data

Supply data that explains the material properties of cuts and fills and, ideally, what material can be used in each. This can be in the form of a reuse matrix or interpretive report. If this is not available, CEA can start with a simplified analysis until a greater level of detail is available.

​

Constraints

Include a list of the currently known constraints, such as haulage limits, bridges that cannot be crossed or borrow pit volumes.

​

Cost rates

If CEA has been retained to advise on haulage plant, we also need indicative cost rates, as these allow us to estimate cost rates and suggest logical fleets.

​

Typical examples