Advantages of laser scanning surveys:-

Rapid working - so cost savings.
Minimal impingement on operations (survey is 'in and out' fast).
High detail with every survey so a much 'richer' data set.
3D Visualisation and computer modelling.
Safer working in 'high risk' locations.
You can now survey the inaccessible !

Mining companies have already utilised laser data for the following applications:-

Analysis of blasting overbreak (and then applying findings to save drill, blast and haulage costs.
Rock mechanics.
Planning.
Volumetric analysis (reserves, pillars, voids etc).
Public presentations.
Safety training.
Ventilation - passage cross sectional areas and surface roughness.