Annual Report,2009 - Directorate General of Mines Safety

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DGMS Annual Report,2009 TABLE: 21 TREND IN SERIOUS ACCIDENTS DUE TO DIFFERENT CAUSES IN COAL MINES Cause 2005 2006 2007 2008* 2009* Ground movement 84 (102) 56 (70) 70 (78) 69 (73) 57 (68) Winding in shafts 2 (2) 5 (7) 2 (11) 0 (0) 3 (4) Transportation machinery 218 (222) 267 (280) 198 (202) 126 (128) 103 (108) (other than winding) Machinery other than 46 (46) 54 (54) 79 (81) 40 (42) 36 (37) transportation machinery Explosive 5 (6) 1 (1) 4 (4) 1 (1) 3 (5) Electricity 5 (12) 5 (5) 3 (6) 0 (0) 2 (2) Gas, Dust etc. - 1 (1) 1 (1) 0 (14) 1 (2) Falls other than fall of ground 550 (552) 375 (376) 456 (458) 351 (352) 309 (312) Other causes 196 (196) 97 (97) 110 (110) 99 (99) 122 (122) TOTAL 1106(1138) 861 (891) 923 (951) 686 (709) 636 (660) * Figures are provisional Note: Figures in parentheses denote the number of persons seriously injured and it includes seriously injureds from fatal accidents also. TABLE: 21A TREND IN SERIOUS ACCIDENTS DUE TO DIFFERENT PLACES IN COAL MINES Place 2005 2006 2007 2008* 2009* Belowground 843 (867) 646 (665) 717 (735) 516 (536) 490 (506) Opencast 98 (101) 88 (99) 83 (88) 74 (76) 50 (54) Aboveground 165 (170) 127 (127) 123 (128) 96 (97) 96 (100) Total 1106 (1138) 861 (891) 923 (951) 686 (709) 636 (660) * Figures are provisional Note: Figures in parentheses denote the number of persons seriously injured and it includes seriously injured from fatal accidents also. A-16
DGMS Annual Report,2009 2.2.3B.1 Ground movement During the year 2009, ground movement accounted for 26(31%) fatal accidents and 57(9%) serious accidents. Further break-up of fatal accidents due to ground movement is given in table 22. TABLE: 22 FATAL ACCIDENTS DUE TO GROUND MOVEMENT IN COAL MINES DURING THE YEAR 2009 Cause No. of accidents Persons killed Persons seriously inj. 1.Fall of roof 17 21 6 2.Fall of side (a) belowground 6 7 - (b) opencast 1 1 - Sub-Total 7 8 - 3.Others (a) bumps 0 0 - (b) air blast 0 0 - (c) land slide 1 2 - (d) collapse of pillar 0 0 - (e) over hang 1 1 1 Sub-Total 2 3 - GRAND TOTAL 26 32 7 2.2.3B.2 Roof fall Strata control is a major problem affecting safety and productivity in underground mines. Experience of the past clearly brings out that roof fall is one of the predominant causes of fatalities in belowground coal mines and that trend continues even today. There were 26 accidents due to ground movement involving 32 fatalities and 07 serious injuries during the year 2009, out of which 17 accidents were due to fall of roof, 7 accidents were due to fall of side and 01 each due to landslide and over hangs. Roof fall accidents accounted for 20% of all fatal accidents in coal mines and it contributed 44% of all fatal accidents in belowground operations. Further critical analysis of roof fall accidents for the last five years 2005 to 2009 revealed the following: I. Physical and Working Condition factors - 1. Method of work: Accident mainly occurred in Bord and Pillar districts. 45% of the fatal accidents occurred in B&P development, 45% in depillaring districts (35% in caving districts and 10% in stowing districts), 2% in longwall stowing and 7% in other places. 2. Height of working: 80% of the fatal accidents occurred in gallery height upto 3m, 20% in 3m to 5m. 3. Width of gallery: 2% of the fatal accidents occurred in width of galleries between 0 - 3.0m and 4% in width between 3.01 -3.5m, 17% between 3.51-4.00m, 40% between 4.01 -4.50m and 35% occurred in width of galleries above 4.50 m. 4. Distance from face: 42% of the accidents occurred within 5m of the working face and 15% each between 5.01 to 10m and 20.01m & above, 8% in 10.01m to 20.00m. A-17
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