Summary of Engineering risk assessment findings
Equipment area Control Significant shortcomings noted Comment
Winder general protection around machinery area no demarcation of machinery area provide handrails and demarcation guards no guards on chain drives eg to indicator provide guards
availability of spares and service one mine experienced problems consider replacing problem components
Winding rope visual examination a short length of rope above the splice was covered by a plastic pipe sleeve to prevent abrasion of the rope
ensure that the full length of rope is open for inspection
on a stage winder the sections of rope around the stage sheaves are not easily inspected
consider making guards easily removable
shortage of staff to undertake inspections review work process and manning needs
measurement and inspection not used in some installations consider need for this control magnetic rope testing not used in some installations consider need for this control frequency of test not the same front end cut and load test not used in some installations consider need for this control
frequency of test not the same proper design of installation to
promote good coiling
poor coiling needed constant attention from engineering staff
investigate use of deflecting sheave to improve coiling
Summary of Engineering risk assessment findings (contd)
Equipment area Control Significant shortcomings noted Comment
Braking system design of links and pins no provision to lubricate pins pins showing signs of wear in heavy use application
design modification required repair and maintenance brake screwdown post poorly repaired maintain engineering standards inspection of links and pins unable to easily remove pins for inspection
(especially the lower caliper pins) NDT not used on some installations
future designs must facilitate removal and improve access to this area
consider use of NDT procedures Braking system
(contd)
testing of main brake by driver not tested against specified ammeter reading
tested using conveyance load in shaft
ensure that ammeter is visible to driver, specify reading and test procedure
testing of emergency brake by electrician
not tested specify and follow procedure
Conveyances
attachments visual inspection not always done by trained staff review work practices
NDT not used in some installations consider need for this control
proper design of attachment components
some attachment pins are of unknown design and manufacture
ensure proper design and manufacture
spare attachment sets available spare sets not always readily available provide spare attachment sets
Summary of Engineering risk assessment findings (contd)
Equipment area Control Significant shortcomings noted Comment
Conveyances (contd)
structure visual inspection some material cars are not inspected before use to ensure suitability for use on incline
improve inspection procedures
not always done by trained staff review work practices proper design some material cars are not designed for
use on incline
consider standardising on car and coupling design
safety door provided at rear of transporter conveyance
door easily damaged during loading/unloading of material cars
review design and maintenance needs
load and safety slings
regular inspection not always over-inspected by engineering staff
review work practice change slings regularly service life not always monitored and
recorded
institute management system spare slings available spare slings not always available ensure spare slings available proper sling attachment points car couplings are often used to attach
safety slings. Non-standard couplings can prevent safe sling attachment
standardise sling attachment points
safety sprag Blair device provided may not function properly due to damage and poor maintenance
ensure proper maintenance and check operation
Summary of Engineering risk assessment findings (contd)
Equipment area Control Significant shortcomings noted Comment
Safety trips and interlocks
visual does not check functionality functional test recommended
functional test not always done ensure proper test
consider over-inspection necessary devices provided and in
working order
devices fitted additional to legal requirements not operational
some devices considered necessary not provided or operational
consider repairing or removing non-functioning devices ensure proper installation and operation
Electrical equipment incl signaling systems
proper design and installation on some systems it was possible to
instruct the driver to move the conveyance when located on another station
review design and installation of lock bell system
consider installation of bell/brake interlock
electrical devices on sinking stage subject to water ingress and corrosion
review design and installation Stations and station
equipment
proper design and layout some dropset support steelwork could be damaged by overloaded cars
slack rope sometimes occurs when conveyance on dropsets
check design of dropset layout, review loading controls
check design of dropset layout to avoid slack rope as far as possible provision of safety drop rails not always properly installed or maintained ensure correct installation and
maintenance safety devices to be operated from
a safe location
safety devices were sometimes operated from an unsafe location
review designs
Summary of Engineering risk assessment findings (contd)
Equipment area Control Significant shortcomings noted Comment
Stations and station equipment (contd)
Proper illumination some stations were poorly illuminated provide illumination to Industry standards
Design of station excavation at some shaft bottom stations a runaway car would exit onto the station
some layouts permit slack rope when car being moved into shaft
excavation could be extended to provide a “dead-end” at shaft bottom initial layouts should avoid this feature Shaft equipment regular inspection and
maintenance
not always sufficient time allocated for this activity
review shaft schedules and work practice
properly installed shaft ladderway some travelling ways require improvement review design and installation safety devices such as safety drop
sets
non-operational or poorly installed check installation and maintenance