Frequently
Asked Questions
This page contains answers to common questions handled by our support staff, along with some tips
and tricks that we have found useful and presented here as questions.
- What are wall stations?
- Who can use wall
stations?
- How do I survey with
wall stations?
- What equipment do I need?
- What software do I need?
Wall
stations are a simple, easy to install, low cost, safe and accurate way of
establishing control in hard rock underground mines. A wall station is a two-part system.
1. A prism attached to a stem.
2. A small hole drilled into the wall of a drive or stope with a piece of aluminium tube inside it.
The aluminium tube is mounted in the wall permanently. The prism and stem are inserted during the survey and removed afterwards.
This system is robust, with only the aluminium sleeve left in the wall underground. It is easily sighted and measured too and precisely creates the reference point every time.
All Civil (Tunnel) and Underground Mine
Surveyors can use wall stations, the only requirement is the walls must be
stable, movement in walls will effect the accuracy of any surveys coming off
these points.
Wall stations create reference points,
it is not possible to set up on, over or under these points. Resection is used
to survey from these reference points.
For a more detailed answer to this
question read the wall station overview
document.
To use wall stations successfully you
will need a Leica Total Station. This can be any professional model ranging
from the TPS1000 series through to the TPS1200 series. The most popular type
of instrument used in Underground mines is either the TCRA1105 or TCRA1103
from the TPS1100 series or the TCRA1205 or TCRA1203 from the TPS1200 series.
All models from these series can be used, but the instruments with the ATR
(Automatic Target Recognition) have been found to be the most productive.
Speak to your local Leica agent if you do not have an instrument.
You will require wall stations stems
and tubing. These can be purchased from C.R.
Kennedy and Co. (Australian agents for Leica Geo Systems).
You will also require Leica Prisms.
These prisms must be used as they are optical centered.
You will need to have Surpac
Vision mining software and MSO (Mine Survey
Office). This will enable you to seamlessly process, create and view all data
required for wall stations surveying. It will also give you a complete audit
trail of your data. Download and test it for yourself.