SOP MANTALOCK
Hazard Identification, Risk Assessment and Control
Authorised by:
Purpose
Scope
Responsibility
This procedure defines the processes to be followed in order to identify
health and safety hazards, assess the risks associated with hazards relating
to use of MANTALOCK in wet holes.
This risk Assessment details the safe handling procedures for wet holes
and the application there of.
The use of hole plugs is considered part of the explosives loading process
and as such will only be carried out under the supervision and control of a
qualified Shotfirer, competent in application
1
Introduction
2
This procedure defines the processes to be followed in order to identify health and safety hazards, assess the
risks associated with each hazard and apply controls (where required) to reduce associated risks.
References
AS 2187.2-2006 Part 2
3
Risk Assessment
When assessing risk, the likelihood of the hazard occurring and the potential consequences if the hazard
occurred are to be considered, as described in the following tables.
Qualitative measures of Likelihood
Level
Descriptor
Description
A
Almost certain
Daily Occurrence: Common or frequent.
B
Likely
Weekly Occurrence: Has happened or a near miss has occurred within PDL Toll.
C
Possible
Monthly Occurrence: Could occur or has been known to have occurred else
where.
D
Unlikely
Annual Occurrence: Feasible to occur, not known to have occurred else where.
E
Rare
Once in 5 years: Whilst feasible, considered to be highly unlikely but not
impossible.
F
Extremely
Rare
< Once in 5 years: Practically impossible.
Qualitative Measures of Consequence
Level
Descriptor
Example Detail Description
No injuries would be expected, possible minor discomfort. Insignificant
financial loss
Minor / in-house first aid treatment, able to return to work immediately with
no lost time. Minor financial loss
External medical treatment required possible lost time injury. Moderate
Financial Loss
1
Insignificant
2
Minor
3
Moderate
4
Major
Extensive injuries, lost time injury, hospitalisation. High financial loss
5
Catastrophic
Potential death or permanent disability. Detrimental financial loss
SOP MANTALOCK
Hazard Identification, Risk Assessment and Control
Qualitative Risk Analysis Matrix – Level of Risk
Consequences
Likelihood
Insignificant
1
H
Minor
2
H
Moderate
3
E
Major
4
E
Catastrophic
5
E
B (Likely)
M
H
H
E
E
C (Moderate)
L
M
H
E
E
D (Unlikely
L
L
M
H
E
E (Rare)
L
L
M
H
H
F (Extremely Rare)
L
L
L
M
M
A (Almost certain)
RISK ASSESSMENT: OPERATING MANTALOCK PLUG
STEP
ACTIVITY
HAZARD(S)
IDENTIFIED
slumping /
misfire
RISK(1)
RISK CONTROL(S)
REQUIRED
Check plug range and
compare with actual
hole diameter. Use
correct plug for hole
range.
Ensure enough weight is
placed in plug and hinge
is functioning correctly
RISK (2)
1.
Selection: Select correct size
MANTALOCK plug for
appropriate hole.
2.
Preparing: locate drill cuttings
and place inside hinged
container leg and place
additional cuttings in top
Bridging/slow
operation
E3
Moderate
Risk
2.
Prepare lowering cord and fasten
drop cord/tape measure
Pinch point/
loose plug
C1
Low Risk
PPE-Gloves
Clear work area
Make sure plug is securely
fastened
F1
Low Risk
3.
Bend plug wings in so that it
travels down hole without
catching
Muscular /pinch
point/ damaged
product
D2
Low Risk
F1
Low Risk
6.
Lowering:
Lower plug to desired location in
water. Once plug meets water,
slow down decent and allow plug
to align
Bridging/
loosing plug /
snagging
C3
Moderate
7
Activating:
Once plug is in desired location
pull sharply on cord to cause
locking leg to engage the hole
Hole slumping
and misfires/
muscular
D3
Moderate
PPE-Gloves. Check hinge
to make sure it is still
functioning and lugs are
located inside pivot
If plug gets stuck, gently
pull on drop cord. Do not
pull quickly as this will
activate the plug causing it
to lock in an undesirable
location. Pull gently and
lower slowly.
Stretch prior to activity
and ensure even footing.
Take slack off the drop
cord and the sharply pull
cord. Do this 2 of 3 times
to make sure rope is free
from keyhole and leg is
engaging hole
E3
Moderate
Risk
F1
Low Risk
F1
Low Risk
E2
Low Risk
F3
Low Risk
SOP MANTALOCK
Hazard Identification, Risk Assessment and Control
4
Confirm: Confirm plug is locked
correctly in the hole
Hole slumping
and misfires/
muscular
D3
Moderate
Secure: Kick in cuttings to form a
base on plug for loading
Hole slumping
and misfires
D3
Moderate
Detach: Once happy that plug is
locked in hole detach cord
Hole slumping
and misfires
C3
High
Muscular pain from bending.

Pinch Points

6
E2
Low Risk
E2
Low Risk
SAFE HANDLING PROCEDURES
Storage: Store in dry area away from direct sunlight
MATERIALS / EQUIPMENT

MANTALOCK Plug

Drop cord (string or rope)

PPE
7
E2
Low Risk
SAFETY AND HAZARDS

5
Stretch prior to activity
and ensure even footing.
Pull gradually on cord, and
hold pressure on plug,
plug should not float up or
move.
Stretch prior to activity
and ensure even footing.
Kick in about 1 foot of dirt
into the hole.
Stretch prior to activity
and ensure even footing.
Pull gradually on cord, and
keep pulling. The oring will
eventually snap under 7kg
force. The drop cord can
now be retrieved
SAFE WORKING PROCEDURE
7..1
Select correct size MANTALOCK plug for appropriate hole and remove from carton just prior to use.
7..2
Determine what depth the plug is to be placed in the hole.
7..3
Place drill cuttings inside the hinged container leg and some in the top
7..4
Allow leg to hang straight and pull activation rope down so that it locks in the keyhole just above the O
ring
SOP MANTALOCK
Hazard Identification, Risk Assessment and Control
7..5
Prepare drop cord allowing an extra 1.5m to prevent a RSI from bending.
7..6
Either tie or clip the drop cord onto the O-ring
7..7
Force the top wings in so that the MANTALOCK will travel down the hole without catching
7..8
Lower the MANTALOCK plug down to the required depth.
7..9
Take slack off the drop cord and the sharply pull cord. Do this 2 of 3 times to make sure rope is free from
keyhole and leg is engaging hole.
7..10
A firm upward pull on the drop line will confirm that the plug is locked in the hole.
7..11
Pull gradually on cord, and hold pressure on plug, plug should not float up or move.
7..12
While holding the cord taunt, kick in at least 2 boot loads of drill cuttings (or 1 foot) to protect
MANTALOCK from falling stemming and larger debris that may impact and dislodge plug.
7..13
Once confirmed that MANTALOCK is holding position, pull gradually on cord, and keep pulling. The oring
will eventually snap under 7kg force.
SOP MANTALOCK
Hazard Identification, Risk Assessment and Control
7..14
The drop cord can now be retrieved and the hole charged.
Exclusion of Liability
MTi Group Pty Ltd does not accept any liability for any loss or damage suffered or incurred by any person or entity however
caused relating in any way to the improper use of this product or the failure to follow the operating procedures of the
product. This exclusion of liability does not seek to exclude any liability that cannot be excluded under statute.
Disclaimer by MTi Group Pty Ltd
This is an important document that should be read in its entirety. If you do not understand it you should consult MTi Group Pty
Ltd without delay and seek guidance prior to the use of the product.