CONTINUOUS MINER DUST SUPPRESSION...The integrated hungry board spray has a predicted life cycle of...
Transcript of CONTINUOUS MINER DUST SUPPRESSION...The integrated hungry board spray has a predicted life cycle of...
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CONTINUOUS MINER DUST SUPPRESSION
Meagan RoseUndergraduate Mechanical Engineer
Simon BurnettDevelopment Mechanical Coordinator
Anglo American Metallurgical Coal
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91%
9%
PERSONAL RESPIRABLE DUST SAMPLES PRIOR TO IMPLEMENTATION OF ENGINEERING CONROLS
COMPLIANT
EXCEEDANCE
PRE ENGINEERING CONTROLS
• 13 EXCEEDANCES
• 150 TOTAL DEVELOPMENT PERSONAL SAMPLES
POST ENGINEERING
CONTROLS
• 0 EXCEEDANCES
• 101 TOTAL DEVELOPMENT PERSONAL RESPIRABLE DUST SAMPLES
• 100 % COMPLIANCE
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HIERARCHY OF CONTROLS - ENGINEERING
ISOLATION VIA CURTAIN SPRAY EFFECT OVER SUPPRESSION
DUST CURTAIN SPRAY COMBINED WITH HYDRAULIC HOSE PROTECTION (ROOF BOLTER)
REDUCED MAINTENANCE OF BOTH SPRAYS AND HYDRAULIC HOSES
USES COOLING WATER DISCHARGE - PILOTED ON WITH CUTTER HEAD
INTERCHANGABLE – SAME MODEL FOR LEFT AND RIGHT SIDE
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NO DUST SUPPRESSION
• COOLING WATER CIRCUIT DISCHARGED TO ATMOSPHERE
• NO ADDITIONAL BENEFIT
INITIAL CURTAIN SPRAY
• COOLING WATER UTILISED IN CURTAIN SPRAY BAR
• FLOW RATE: 42 L/MINUTE
• REDUCTION IN RESPIRABLE DUST EXPOSURE BY 53%
INTEGRATED POLY SPRAY
• COOLING WATER UTILISED IN INTEGRATED POLY SPRAY
• FLOW RATE: 21.42 L/MINUTE
• REDUCTION IN RESPIRABLE DUST EXPOSURE BY 85%
• REDUCTION IN WATER USAGE OF 21 L/MINUTE
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CURTAIN SPRAY BANKS – 60 DEGREES
• MITIGATES LOSS OF WATER
• ENHANCE THE EFFECT OF VENTILATION
END SPRAY – 45 DEGREES
• REDIRECTION OF DUST ACROSS FACE AND THROUGH THE VENTILATION TUBE
FAN SPRAY APPLICATION ANGLE – 65 DEGREES
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COST SAVING
SECONDARY USE OF WASTE WATER
REDUCED RESPIRABLE DUST
EXPOSURE
INCREASED PRODUCTIVITY AND
REDUCED MAINTENANCE
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0
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0 10 20 30 40 50 60 70 80
Du
st C
on
cen
trat
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(m
g/m
3 a
ir)
Time (minutes)
Real Time Dust Monitoring Comparison
RESPIRABLE DUST AVERAGE
CONCENTRATIONS
NO DUST SUPPRESSION
6.99 mg/m3
INITIAL CURTAIN SPRAY
DESIGN
3.29 mg/m3
INTEGRATED POLY SPRAY
1.03 mg/m3
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CONTINUOUS MINERS
• MODIFICATIONS MAY BE NEEDED DEPENDING ON THE MACHINE
CONVEYOR BELT – BOOT END
• INTEGRATE SPRAYS INTO HUNGRY BOARD WITH A LOWER SPRAY ANGLE
COAL PREPARATION PLANT - HOPPER
• ROBUST PROTECTION OF DUST SUPPRESSION SPRAYS – INCREASED RELIABILITY
HARD ROCK
PORT – TRAIN LOAD OUT
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The integrated hungry board spray has a predicted life cycle of 4 year at a cost of $3, 568 per unit.
Annually the fleet of 3 continuous miners use approximately 110 5-1 hydraulic hoses.
110 ℎ𝑜𝑠𝑒 𝑘𝑖𝑡𝑠 𝑎𝑛𝑛𝑢𝑎𝑙𝑙𝑦 ×$2095
ℎ𝑜𝑠𝑒 𝑘𝑖𝑡= $𝟐𝟑𝟎 𝟒𝟓𝟎 𝒊𝒏 𝒎𝒂𝒕𝒆𝒓𝒊𝒂𝒍 𝒄𝒐𝒔𝒕𝒔 𝒂𝒏𝒏𝒖𝒂𝒍𝒍𝒚
110 ℎ𝑜𝑠𝑒 𝑘𝑖𝑡𝑠 𝑎𝑛𝑛𝑢𝑎𝑙𝑙𝑦 ×70 𝑚𝑖𝑛𝑢𝑡𝑒𝑠
ℎ𝑜𝑠𝑒 𝑐ℎ𝑎𝑛𝑔𝑒×
1 ℎ𝑜𝑢𝑟
60 𝑚𝑖𝑛𝑢𝑡𝑒𝑠= 𝟏𝟐𝟖. 𝟑 𝒉𝒐𝒖𝒓𝒔 𝒍𝒐𝒔𝒕 𝒑𝒓𝒐𝒅𝒖𝒄𝒕𝒊𝒐𝒏
𝐴𝑝𝑝𝑟𝑜𝑥𝑖𝑚𝑎𝑡𝑖𝑜𝑛 𝑜𝑓 10 𝑑𝑎𝑦𝑠 𝐿𝑜𝑛𝑔𝑤𝑎𝑙𝑙 𝐹𝑙𝑜𝑎𝑡
128.3 ℎ𝑜𝑢𝑟𝑠 𝑙𝑎𝑏𝑜𝑢𝑟 ×$60
1 ℎ𝑜𝑢𝑟𝑓𝑖𝑡𝑡𝑒𝑟 𝑙𝑎𝑏𝑜𝑢𝑟 = $𝟕𝟕𝟎𝟎 𝒊𝒏 𝒍𝒂𝒃𝒐𝒖𝒓 𝒄𝒐𝒔𝒕𝒔 𝒂𝒏𝒏𝒖𝒂𝒍𝒍𝒚
TOTAL SAVINGS OF 10 DAYS LONGWALL FLOAT AND $238 150
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