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Muswellbrook Coal Company ________________________________________ Mining Plant Sound Power Survey 2016 Prepared for Muswellbrook Coal Company ________________________________________
Muswellbrook Coal Company
________________________________________
Mining Plant Sound Power Survey 2016
Prepared for
Muswellbrook Coal Company________________________________________
Muswellbrook Coal Company - M ining Plant Sound Power Survey 2 016 Page i
Muswellbrook Coal Company
Mining Plant Sound Power Survey 2016
Reference: 16155_R02Report date: 27 July 2016
Prepared forMuswellbrook Coal CompanyPO Box 123Muswellbrook NSW 2333
Prepared byGlobal Acoustics Pty LtdPO Box 3115Thornton NSW 2322
Prepared: Jonathan ErasmusAcoustic Technician
QA review: Ryan BrunigesScientist(Acoustics)
Global Acoustics Pty Ltd ~ Environmental noise modelling and impact assessment ~ Sound power testing ~ Noisecontrol advice ~ Noise and vibration monitoring ~ OHS noise monitoring and advice ~ Expert evidence in Land andEnvironment and Compensation Courts ~ Architectural acoustics ~ Blasting assessments and monitoring ~ Noisemanagement plans (NMP) ~ Sound level meter and noise logger sales and hire
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Table of Contents
1 INTRODUCTION........................................................................................................................................................1
1.1 Terminology...........................................................................................................................................................1
2 TESTING METHODOLOGY.....................................................................................................................................2
2.1 Equipment Used....................................................................................................................................................4
3 RESULTS........................................................................................................................................................................5
4 CLOSURE.......................................................................................................................................................................6
AppendicesA CALIBRATION CERTIFICATES..............................................................................................................................7
B SOUND POWER RESULTS 2016............................................................................................................................10
C SOUND POWER RESULTS COMPARISON 2014 – 2016..................................................................................13
D SOUND POWER SINGLE & ONETHIRD OCTAVE GRAPHS.....................................................................16
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1 INTRODUCTION
This report provides sound power (LW) data for mobile equipment owned and operated by Muswellbrook
Coal Company (MCC)
MCC have established an equipment noisemonitoring program to comply with requirements of the MCCNoise Management Plan (February 2005). This report presents the results of a sound power testing surveyundertaken in July 2016.
1.1 Terminology
Definitions of terminology, which may be used in this report, are provided in Table 1.1.
Table 1.1: TERMINOLOGY & ABBREVIATIONS
Descriptor Definition
dBDecibels. For sound pressure level this is 10 times the logarithm to the base 10 of the
ratio of the meansquare sound pressure to the square of the reference sound pressure (20micropascals)
dB(A)Noise level measurement units are decibels (dB). The “A” weighting scale is used to
describe human response to noise.
SPLSound pressure level (SPL), fluctuations in pressure measured as 10 times a logarithmic
scale, the reference pressure being 20 micropascals.
LWLinear sound power level, expressed in decibels, is the logarithmic ratio of the soundpower of a source in watts (W) relative to the sound power reference base of 1012W
LWA Aweighted sound power level.
LAeq The average Aweighted noise energy during a measurement period, in dB
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2 TESTING METHODOLOGY
Measurement and calculation was conducted with a reduced scope version of the following standards:
• AS 2012.1 'Acoustics – Measurement of airborne noise emitted by earthmoving machinery and
agricultural tractors – Stationary test condition – Determination of Compliance With Limits forExternal Noise'; and
• ISO 6395 'Acoustics – Measurement of exterior noise emitted by earthmoving machinery – Dynamic
test conditions'.
The reduced scope uses fewer microphone positions than specified in the standards, with only groundpositions used. The rationale behind this is to increase mobility of the testing team, flexibility in choice oftesting location, and to minimise disruption to mining production.
The test is mainly used as a screening tool, a more precise equipment sound power that would result fromadherence to the above standards was not required. A minimum of two test runs were recorded for eachplant item with the aim to have less than 1.5 dB difference between results. It is considered that the resultsare of sufficient accuracy and repeatability for the purposes of this survey.
The tests conducted during the 2016 survey were undertaken using a dynamic test, where the plant itempasses through the test area under full power on level ground. For trucks this was modified to includeuphill under power, and downhill under retard tests to simulate normal hauling activities. Themeasurement is commenced and completed when the plant item (centre of) passes between microphonepositions 2 & 3 and 1 & 4 respectively. For this survey positions 1 & 2 were tested during uphill testing,which corresponded with truck testing done in 2015.
Stationary testing was conducted on the wash plant and diggers, and involved measurement at a knowndistance and the machine at high idle.
Typical test areas are presented in Figure 1 and Figure 2.
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Typically for mobile plant items the test area radius ('R” in Figures 1 and 2) was 20 metres. This was variedto suit larger items undergoing normal operation (e.g. excavators, crusher). For static tests, fewermicrophone positions than presented in Figure 2 were used when the test area was obstructed (e.g.accessible locations for crusher).
Figure 1: Sound Power Microphone Positions
12
3 4
I S O m i c r o p h o n e p o s i t i o n s
T r a v e l p a t h o f m a c h i n e
Figure 2: Alternate Stationary Sound Power Microphone Positions
A S m i c r o p h o n e p o s i t i o n s
1
3
5
7
F r o n t o fm a c h i n e
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2.1 Equipment Used
The equipment used to measure and record noise levels are listed in Table 2.1. Calibration certificates areprovided in Appendix A.
Table 2.1: SOUND LEVEL MEASUREMENT EQUIPMENT
Model Serial Number Calibration Due Date
SVAN 958 noise and vibration analyser 20880 25/03/2017
Rion NC74 sound level calibrator 34483783 21/11/2016
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3 RESULTS
During this sound power testing survey, 12 plant items were tested. Sound power results are presented inAppendix B. A comparison of sound power results between 2014, 2015 and 2016 surveys are presented inAppendix C.
Single and onethird octave graphs, which can be useful in identifying noise sources, are presented inAppendix D.
We trust this information is per your requirements. Please contact us if you require further details or advice.
Global Acoustics Pty Ltd
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APPENDIX
A CALIBRATION CERTIFICATES
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APPENDIX
B SOUND POWER RESULTS 2016
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SOUND POWER RESULTS 2016
Plant ID Make/Model Test Date Test Type LWA (dB) LW (dB) Notes
Excavator
209 Hitachi 3600 25/07/2016 Stationary 115 126
Trucks
17 Caterpillar 777D 04/07/2016 Uphill, Loaded 121 124
31 Hitachi EH3500AC11 04/07/2016 Uphill, loaded 120 128
31 Hitachi EH3500AC11 04/07/2016 Downhill, loaded 120 127
32 Hitachi EH3500AC11 04/07/2016 Uphill, loaded 122 129
32 Hitachi EH3500AC11 04/07/2016 Downhill, loaded 120 127
33 Hitachi EH3500AC11 04/07/2016 Uphill, loaded 121 129
33 Hitachi EH3500AC11 04/07/2016 Downhill, loaded 120 126
34 Hitachi EH3500AC11 04/07/2016 Uphill, loaded 120 129
34 Hitachi EH3500AC11 04/07/2016 Downhill, loaded 120 127
35 Hitachi EH3500AC11 04/07/2016 Uphill, loaded 121 131
35 Hitachi EH3500AC11 04/07/2016 Downhill, loaded 120 127
36 Hitachi EH3500AC11 04/07/2016 Uphill, loaded 121 129
36 Hitachi EH3500AC11 04/07/2016 Downhill, loaded 120 126
37 Hitachi EH3500AC11 04/07/2016 Uphill, loaded 118 128
37 Hitachi EH3500AC11 04/07/2016 Downhill, loaded 120 126
38 Hitachi EH3500AC11 04/07/2016 Uphill, loaded 118 129
38 Hitachi EH3500AC11 04/07/2016 Downhill, loaded 120 127
Dozers
1437 CAT D10T 25/07/2016 1st Gear, Forward 112 118
1437 CAT D10T 25/07/2016 1st Gear, Reverse 118 120
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SOUND POWER RESULTS 2016
Plant ID Make/Model Test Date Test Type LWA (dB) LW (dB) Notes
1437 CAT D10T 25/07/2016 2nd Gear, Forward 121 124
1437 CAT D10T 25/07/2016 2nd Gear, Reverse 126 127
1494 CAT D10T 25/07/2016 1st Gear, Forward 114 122
1494 CAT D10T 25/07/2016 1st Gear, Reverse 118 123
1494 CAT D10T 25/07/2016 2nd Gear, Forward 121 125
1494 CAT D10T 25/07/2016 2nd Gear, Reverse 123 127
Notes:
1. "-" denotes information is not available
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APPENDIX
C SOUND POWER RESULTS COMPARISON 2014 – 2016
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SOUND POWER COMPARISON 2014 – 2016
Plant No. Make / Model Test Type 2014 Results 2015 Results 2016 Results1 2015 to 2016Change inLWA(dB)
2015 to 2016Change in
LW(dB)LWA (dB) LW (dB) LWA (dB) LW (dB) LWA (dB) LW (dB)
Trucks
17 Caterpillar 777D Uphill, Loaded 123 126 119 122 121 124 2 2
31 Hitachi EH3500AC11 Uphill, Unloaded 120 131 117 128 120 128 3 0
31 Hitachi EH3500AC11 Downhill, Unloaded 115 123 119 125 120 127 1 2
32 Hitachi EH3500AC11 Uphill, Unloaded 119 131 116 127 122 129 6 2
32 Hitachi EH3500AC11 Downhill, Unloaded 115 123 117 124 120 127 3 3
33 Hitachi EH3500AC11 Uphill, Unloaded 120 131 121 129
33 Hitachi EH3500AC11 Downhill, Unloaded 115 122 120 126
34 Hitachi EH3500AC11 Uphill, Unloaded 120 131 116 127 120 129 4 2
34 Hitachi EH3500AC11 Downhill, Unloaded 115 122 116 127 120 127 4 0
35 Hitachi EH3500AC11 Uphill, Unloaded 119 131 120 128 121 131 1 3
35 Hitachi EH3500AC11 Downhill, Unloaded 116 123 119 126 120 127 1 1
36 Hitachi EH3500AC11 Uphill, Unloaded 120 131 116 127 121 129 5 2
36 Hitachi EH3500AC11 Downhill, Unloaded 115 122 119 125 120 126 1 1
37 Hitachi EH3500AC11 Uphill, Unloaded 121 131 116 127 118 128 2 1
37 Hitachi EH3500AC11 Downhill, Unloaded 115 122 119 126 120 126 1 0
38 Hitachi EH3500AC11 Uphill, Unloaded 119 132 114 128 118 129 4 1
38 Hitachi EH3500AC11 Downhill, Unloaded 115 122 118 125 120 127 2 2
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SOUND POWER COMPARISON 2014 – 2016
Plant No. Make / Model Test Type 2014 Results 2015 Results 2016 Results1 2015 to 2016Change inLWA(dB)
2015 to 2016Change in
LW(dB)LWA (dB) LW (dB) LWA (dB) LW (dB) LWA (dB) LW (dB)
Dozers
1437 CAT D10T 1st Gear, Forward 116 120 114 119 112 118 2 1
1437 CAT D10T 1st Gear, Reverse 119 122 120 123 118 120 2 3
1437 CAT D10T 2nd Gear, Forward 123 126 128 129 121 124 7 5
1437 CAT D10T 2nd Gear, Reverse 129 130 122 125 126 127 4 2
1. Hitachi EH3500AC11 trucks were loaded and tested using 16m radius.
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APPENDIX
D SOUND POWER SINGLE & ONE-THIRD OCTAVE GRAPHS
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