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7/27/2019 Ferreiro s

1/23

GESTION DE

MANTENIMIENTO DEEQUIPO MINERO

ING. ALBERTO CHAVARRIA

Huancayo 05 Julio 2002


2/23

MANAGEMENT

PRODUCTION

SUPERVISION

MAINTENANCE

SUPERVISION

MACHINE OPERATORS

AND SERVICE PEOPLE

SUCCESS


3/23

HAULING

Traffic flow

Truck staging

Haulroad maintenance

Grades and curves

Length and widthDust control

LOADING SUPPORT

DRILL AND BLAST

Techniques

Optimum loadsTruck spotting

Conditions

Dump tractors

Trap dozersMotor graders

Water wagons

Fragmentation

COST INFLUENCERS


4/23

GESTION DE MANTENIMIENTO

ALGUNOS INDICADORES DE GESTION

9DISPONIBILIDAD

9UTILIZACION

9MTBS

9MTTR

9MR


5/23

BENCHMARCKS

99AVAILABILITY: 88AVAILABILITY: 88 -- 92%92%

99UTILIZATION : 90 %UTILIZATION : 90 %

99MTTR: 3MTTR: 3 6 hrs.6 hrs.

99MTBS:MTBS: 6060 -- 80 hrs.80 hrs.

99MR: 0.2MR: 0.2 0.30.3 All JobsAll Jobs

0.50.5 Over haul onlyOver haul only


6/23

Benchmarks for mining ...

9Operations payload management, delays, load

times, exchange times, production, cost

per ton, etc..

9Maintenance availability, utilization, MTTR

MTBS, MR , service accuracy, backlogsetc..

9 Application ... grade/ grade variation, rolling

resistance, haul road maintenance,

traffic flow, etc..


7/23

AVAILABILITYAVAILABILITYAVAILABILITY

9Mechanical Availability (%) = scheduled hours - downtimescheduled hours

9 Physical Availability (%) = operating hoursoperating hours - downtime

Availability (%) = MTBS__MTBS + MTTR


8/23

785 TRUCK AVAILABILITY

75

80

85

90

95

100

Nov Dec Jan Feb Mar Apr May Jun Jul Aug

%

PHISICAL

AVAILABILITY

MECHANICAL

AVAILABILITY

TARGET

UTILIZACION


9/23

MINERA BARRICK MISQUICHILCA

785C FLEET AVAILABILITY

94.393.3

92

88.3

93.6 93

89.8

87.586.5

83.4

86.4787.2

76

7880

82

84

86

88

90

92

94

96

JAN FEB MAR APR MAY JUN JUL

PE

RECENT

%

Mechanical Availability Phisical Availability Target


10/23

LOST AVAILABILITY 992 FLEET

Electric System

10%

Steering System

7%

Grease Lines

22%

PM38%

Lift Tilt Sensor

6%

Transmiss ion Syst

4%Tire

10%

Others

3%


11/23

Utilization =

Benchmark: utilization = 90%

Operational delays that affects Utilization Percent:

Shifts : two or threeClimate factors

Blasting

Planning, parts usage, tires, etc.

collect & enter daily; analyze monthly; monitor/

trend over 12 month interval.

operating hours

available hours

UTILIZATION


12/23

785C FLETT MINERA BARRICK MISQUICHILCA

AVAILAVILITY VS. UTILIZATION

94.393.3

92

88.3

93.6 93

89.8

87.586.5

83.4

86.4787.2

92.1

94 93.4 93.6

90.7 91

76

80

84

88

92

96


P

ERCENT%

Mechanical Availability Phys ical Availability Utilization


13/23

MINERA BARRICK MISQUICHILCA

AVAILABILITY VS. UTILIZATION

75

78

81

84

87

90

93

96


PERCE

NT

%

Mechanical Availability Physical Availability

Utilization Potencial (Utilization)Potencial (Physical Availability)


14/23

MTBS(MEAN TIME BETWWEN SERVICE)

MTBS (hours) = operating hours

number of shutdowns

shutdowns can be scheduled or unscheduled,

include all maintenance and repairs except daily lubes,

refueling & inspections,

exclude operational delays, shift changes, lunch breaks, etc., grouped repairs count as one shutdown,

monitor by fleet, machine & component/ system,

indication of machineReliability and maintenanceEffectiveness,

report monthly; monitor/ trend over 12 month interval.


15/23

MEAN TIME BETWEEN SERVICE

MBM 994 WHEEL LOADER FLEET

0

10

20

30

40

50

60

70

80

90

HO

URS

994 WHEEL LOADER 26.8 42.7 34.8 43 53.51 58

TARGET MIN 60 60 60 60 60 60 60

TARGET MAX 80 80 80 80 80 80 80



16/23

(MEAN TIME TO REPAIR)

MTTR

MTTR (hours) =

Benchmark (OHTs): = 3 to 6 hours (new/ mature)

shutdown criteria are the same as rules for MTBS, all delays/ wait time are included as downtime,

monitor by fleet, machine & component/ system,

indication of machineMaintainability/ Serviceability and

maintenanceEfficiency, MTTR < 3 hours indicates patching and/or high percentage

of unscheduled repairs,

MTTR > 6 hours indicates inefficiencies and/or excessive delays,

report monthly; monitor/ trend over 12 month interval.

downtime hours

number of shutdowns


17/23

MEAN TIME TO REPAIR

992 G WHEEL LOADER FLEETMBM

0

2

4

6

8

10

12

HOURS

992G WHEEL LOADER 6.1 10.2 2.9 7.8 6.8 7.9

TARGET MIN 3 3 3 3 3 3 3

TARGET M AX 6 6 6 6 6 6 6


TREND LINE


18/23

Availability %

MTBS vs. MTTR for various Availabilities

10 20 30 40 50 60 70 80 90 1000

5

10

15

20

MTBS - (hours)

MTTR

-(hours)

85%

86%

87%

88%

89%

90%91%

92%

93%

94%

95%MTTR3 - 6 hrs

MTBS

60 - 80 hrs

target operating range


19/23

Benchmark (OHTs): = .20 to .30 (charged)

.50 (overall) charged MR includes all workorder hours,

overall MR includes workorder hours plus management, staff,

supervision & idle hours,

includes component R&I; excludes component overhauls & tires, can be good manpower budgeting tool,

indication of efficiency of workforce,

report monthly (by fleet); monitor/ trend over 12 month interval.

MR

(MAINTENANCE RATIO)

MR = maintenance (& repair) man-hoursoperating hours


20/23

OVER LOAD


21/23

VIMS (VITAL INFORMATION MANAGEMENT SYSTEM)

785C TRUCK


22/23

LOAD DISTRIBUTION MD703 - MAY

12 17

65

157

237 231216

114

49

12 9

0

50

100

150

200

250

300

LESS

THAN 135

135-140 140-145 145-150 150-155 155-160 160-165 165-170 170-175 175-180 more than

180

METRIC TONS

LOADQU

ANTITY

TARGET

PAYLOAD

10% OVER

T.P.20% OVER

T.P.

NO MORE THAN

10% OF TOTAL

PAYLOADS

CERO

PAYLOAD

MBM785C TRUCK


23/23

FIN

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