Mines and Bunkers Volume 10, Fire Safety Aspects of Polymeric Materials (1980) / Chapter Skim
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APPENDIX A: MINE ACCIDENT STATISTICS
APPENDIX A: MINE ACCIDENT STATISTICS
Pages 130-147
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From page 130... ...
The fi gures indicate that underground coal m i nes are su bstantial l y m ore hazardous than underground metal and non- metal m i nes but that the numbe r of fata l ities resu lting from fire is rel ative l y small compared to those resu l ti n g from other causes. A su bstantial reduction i n fi re incidence after 1 970 is also i ndicated and can be attri buted to regu l ations resulti ng fro m Acts of Congress passed i n 1 966 and 1 969.
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From page 131... ...
The major cause of work-re l ated deaths, fal ls of grou nd, accounts for the same percentage as in the past in underground m i nes. It is also evi dent that meta l and non-meta l m ine fi res genera l l y represent only a sma l l fracti on of fatal ity causes ( an exception occu rred in 1 97 2 when a fi re in the Sunsh ine mine k i l led 91 )
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From page 132... ...
5 8 l la u bl(e 16 3 4 10 4 Sliding or fa l l i ng ma teria l s 2 4 2 2 M a c h i nery 7 3 3 6 I! E x p losives 2 5 4 3 2 Flcc t ri d t y 2 I I 3 I l la n d l i ng m a t e r i a l s I 2 I 3 3 S u ff1K a l i o n 3 10 3 Mine f i r e� 2 91 2 I nr u sh of ma l e r i ;l l s or w a t e r 2 H a n d t o oh l l r l i c op t e r c r a sh U n k nown To t a l s 60 56 1 34 49 50 S u r face m i n e s : M a c h i n e ry 22 27 21 34 30 H a u lage 14 21 25 23 21 hi l l s <> f perso n s 8 10 6 9 6 l l a n d l i ng of nw t e r i a l s 4 4 3 6 6 F a l l � nf gro u n d 9 2 5 8 7 Flet· t r i c i t y 10 2 3 R 5 S l i d i ng , fa l l i ng m a t e r ia l s I 2 3 5 E x p l o si ve s 2 3 I 4 M i n e fi re 1 M i sc e l l a n e o u s 2 To t a l s 73 69 65 93 85 Mills: Machinery 12 14 19 9 9 H a u lage 6 I!
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From page 133... ...
APP E N D I X A All Mines and Mills 1 97 1 1 972 1 973 1 974 Machi nery Mach i nery Machi nery Fire 1- Haulage Haulage Hau lage z w (J Haulage a: w Fall of ground Fa l l of ground Fall of ground A Fall of grou nd Fal l of person Fall of person Fall of person E lectricity t:l actn citv t:XPIOSIV8S Other Other Other Other N u mber = 1 63 234 1 75 1 57 Figure A- 1.
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From page 134... ...
Figure A·.l Cause and Location of Fires and Explosions in Underground Meta/ and Non Metal Mines, 1945- 1974 (Johnson, 1976)
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From page 135... ...
D u ring th is peri od there were 386 fire incidents ; these fi res are broken down by machi ne i n Table A-7 and their ch ronology is shown in F igu re A-7. Tabl e A-8 indicates the number of electrical fire inci dents per state for 1 952- 1 970.
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From page 136... ...
tl) w a: LL LL 0 a: w a:l � :J z o �L-L-�L-L-L-�L-����-J 1 954 1 964 1 974 YEAR Figure A-ti Fires in Underground Coal Mines 19� 1974 (Mitchell and Verakis, 1975)
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From page 138... ...
MINES AND BUNKERS Tabla A·5 FiiW and ExpiOiiom in Underground Ooal Min-. - - -- - - -- - EIBl� -- -- -- -- -- - - - - 1 97 0 -711 1 9 60-64 1 9 6 5- 6 9 Production , mi l l ion tone 1 11 40 1 119 8 1 12 3 Number of man-hours , mi l lions 8 2 11 823 768 Tone per man-hour 1.8 1.8 2.
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From page 139... ...
APP E N D I X A Table A-7. Number of Fires per Mechine Type, 1952- 1 970.
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From page 140... ...
1 970 period even though these data are not always complete and the nu mber of data poi nts in each ta bu lati on vary. One fact, however, is clearly esta bl ished : of the 386 machine fi res, all but two were electrica l l y i nitiated .
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From page 141... ...
Table A- 1 0 rel ates the number of fi res to mine production. There is nothi n g in the ava i l a ble information that sh ows th is to be more than coi ncidence; however, a possi ble factor is that conventional m inin g is the 141
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From page 142... ...
The exti ngu ish i ng ti me decreased to 5.3 h ou rs for mi nes produci ng 2,000 tons per shift and to 1 to 2 hours for m i nes producing more than 4,000 tons per sh ift. Even though these val ues are dependent on the number of fi res occu rri ng in the different size m i nes, which makes the ti me-lost values for the l arger produ ction mi nes less statistically accurate, the smal ler pro· duction mines do require more ti me for fire exti ngu ish ment.
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From page 143... ...
The fi res occu rri ng off the mach ine under normal working operations include tra i l ing cabl e ru n overs, crushes, snags on the cable gu i de, and over-heats on the cable reel in wh ich the tra i l ing cable was judged to be properly spliced and in good condition. F i res included in the mai ntenance category resu lted from tra i l i n g cable that or switches or circuit protective dev ices th at were not properly m ai ntai ned.
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From page 144... ...
D i rect coal ignition by e l ectrical fai l u re is a reasonably m i nor factor even though most fi res occur i n highly volati l e bitu mi nous seams. H owever, t h i s refers onl y to propagation on t h e mach i ne and does not refer to fire spread to roof or ri b.
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From page 145... ...
A 4 United Kingdom Coal Mines I n order to put domestic coal m i ne fi re problems in perspective, the fol l owing statistics dea ling with coal m i ne fi res and expl osions i n the United K ingdom are presented.
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From page 146... ...
MINES AND BUNKERS Table A - 1 2. Underground Explosionr a t Coel Minft In th e United Kingdom, 1968- 1972.
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From page 147... ...
Mine SefetV Admin istration Fire Suppreuion Equipmen t, prepared U.S. Bu Mi nes Contract 1 1 1 386, 1 973 (NT I S PB 236592/AS)
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