1. Innovation

2. Our Mission
• The Leadership and Staff of Sandbox
Mining, in collaboration with our
Associates, pledge that we will strive to
develop and introduce new and
innovative equipment with
appropriate technology to assist the
South African mining industry in
particular and the International mining
industry in general.
2

3. Why are we here?
• Currently limited technology to
measure the behaviour of tendons
and cable anchors once installed.
• Potentially dangerous working
conditions, associated with current
tendon installations, have been
identified.
• Potential additional ways to minimise
loss of production have been
identified.
• Rehabilitation of collapsed
excavations is costly.
• Potentially harmful Workforce
incidents.

4. Electronic Monitoring Cable Anchor Device
(EMCA)
SA Patent Application No. 2010/05562

5. Electronic Monitoring Cable Anchor Device
(EMCA)
SA Patent Application No. 2010/05562
• Compatible with
all types of Cable
Anchors or
Chemically
grouted tendons
• Ease of use:
Plug and Play
• Read tension in cables
– REAL TIME
• Each unit has a unique
code for position ID
• Communicate to
control room via
leaky feeder or
optic fibre
• 24/7 / 365 logging and
monitoring
• Monitoring on- or off-
site with data backup
• Mine Plan Map overlay
• Potential solution
to one of the DMR
concerns
Backup

6. Electronic Monitoring Cable Anchor Device
(EMCA)
SA Patent Application No. 2010/05562
Depending on the tension deviation from
the set point on the anchor, LED’s
colours change as follows:
Correct tension: safe working conditions
Danger: Evacuation – Increase in
tension.
Warning: Rock movement – loss in
tension, inspection needed
Note: Personalise warning via cap lamp
cable (Optional)

7. Robust construction test.
Amandelbult Dishaba & Impala 2A Mine
After the blast the units were opened and examined, it was
established that the units were not damaged. (refer to SRK report) 7
After:
Before:
1st Blast – units installed 500 mm from the face before the blast.
2nd Blast – units were 2m from the working face.

8. Features and Benefits
8
Individual identification
Ease of installation
 Compact unit
 Multi EMCA available on request for pillar monitoring
 Manufactured to IS and ISO 9000 standards
 Intrinsically safe
 Waterproof
Memory
a. Non-volatile memory
b. Instant logging and alarm conditions
c. Personal alarm system attached to cap
lamp battery cable (optional)
d. Individual tracking

9. Methods of Communication
Using:
a. Fibre-optic cable interface
b. Leaky Feeder
c. Wireless
d. Wi-Fi
Line of Sight Range of 25m with the ability of MESHING
Communication Protocol:
a. Antares Serial Protocol
b. RS232 and RS485 over serial
9

10. POWER SOURCE
 Power
Capable of operating off:
4.7 Volt DC battery pack
Optional:
24 Volt DC battery pack
110 Volts AC
220 Volt AC
 Battery monitoring
 Rechargeable battery
 Ease of battery change
10

11. Considerations
• What will it
cost ?
Modelling the
costs – will be
based on volume?
• When will the
ECMA be
available?
The EMCA is
available with
stock on hand.
EMCA’s
Relay Units
Accumulator
Server
UPS

12. Financial Implications
Financial arrangements can be made to suit
individual mines/operations.
e.g. 1) CAPEX on hardware.
2) Leasing of monitoring equipment and
software.

13. EMCA Underground Mesh
Individually Identified Unit Range 25m Line Of Sight
Communications Network
Sandbox Mining Global Monitoring Control Room
Each Mine monitored on individual Unit

17. Sandbox Mining
Monitoring Software

18. Internet
Mine Onsite Monitoring – Control Room
ControlCentreOnsiteServerRoom
RockEngineers
Mine Shaft Head
Underground
Ethernet
Ethernet
REM Monitor
Ethernet
REM Console
Ethernet
Sandbox Mining – Off Site Monitoring
SandboxMiningControlCentre
REM CentreEthernet
REM Monitor
Ethernet
Ethernet
RFSignal
Com port
Transceiver
LeakyFeeder/Etnernet
LeakyFeeder/Ethernet
Leaky Feeder
Control Box / Ethernet
AntaresViaComPort
REM Service
Transceiver
Ant+
Ant+
Ant+
Accumulator
Ant+
Ant+
Ant+
Accumulator

19. CMD (Closure Monitoring Device)

20. This is a positive indication
that closure took place.
Temporary support on the
Face is very important

21. CMD (Closure Monitoring Device)
ELI (Electronic Load Indicator)
EMCA
Camlock Remote Release
Mechanism
Height Adjustment
Reflective Tape
Anti Tamper Lock-out
The Camlocks can easily be
moved and re-installed.
Meshing will automatically
take place between the
devices.

23. EMCA Installed

24. Sandbox Mining Pty(Ltd)
• Andries Lottering (Director)
• Cell: +27 79 263 8486
• andries@sandboxmining.co.za
• andrieslottering@ymail.com
• Skype: andries.lottering
• Web Address www.sandboxmining.co.za
“UMUNTU NGUMUNTU NGABANYE ABANTU”
A person is only a person through other people.