Reduction of risk from roof and side fall in Indian coal mines

[object Object],[object Object],[object Object]

Comparison of fatal accidents due to fall of roof & sides and other causes in coal mines since 1997 to 2006. Belowground accidents due to fall of roof and fall of sides

* Provisional Year Fall of roof Fall of sides Total BG Accidents Total accidents in Coal Mines 1997 38 12 94 143 1998 35 15 80 128 1999 33 11 74 127 2000 27 14 62 117 2001 30 9 67 105 2002 23 11 48 81 2003 18 5 46 83 2004 26 8 49 87 2005 18 7 49 96 2006* 13 4 44 79

With introduction of roof bolts for supporting freshly exposed roof in development district, there has been decreasing trend in accidents due to fall of roof in development districts. Method 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Total Board & Pillar Development 19 21 16 11 10 13 07 09 10 04 119 Depillaring 18 14 16 16 16 10 11 13 06 06 126 Long wall & Others 01 01 01 03 04 00 00 03 00 01 14 Total 38 36 33 30 30 22 18 25 16 11 259 Long wall & Others 5% Depillaring 49% Board & Pillar Development 46%

It is revealed from above table that in almost all the mines where accident due to fall of roof has taken place, SSR has been framed. However, effectiveness of framing of SSR or its implementation needs to be assessed to identify the weakness in the system. Year No. of accidents due to fall of roof No. of SSR framed No. of SSR not framed 2002 22 20 0 2003 18 13 1 2004 26 20 0 2005 18 15 0 2006 13 9 0 Total 97 77 1

[object Object],[object Object],Status of Support at accident place (Roof Bolt and Conventional support) (2002-2006) Not Supported 49% Supported 51%

[object Object],[object Object],Distribution of roof fall accidents by Distance from Face 10.01 to 20.00 m 9% 20.01 m & Above 11% 5.01 - 10.00 m 16% Other places 22% 0.00 - 5.00 m 42%

[object Object],[object Object],Distribution of Fall of Roof accidents by Thickness of Fall 0.31 - 1.00 m 27% 0.16 - 0.30 m 32% Not Applicable 4% 1.01 m & Above 10% 0.00 - 0.15 m 27%

[object Object],Distribution of Fatal Roof Fall Accidents by nature of Fallen Strata Data Not Available 4% Coal/Shale/Sandstone 2% Shale 17% Coal & Shale 8% Coal & Sandstone 0% Sandstone 40% Shale & Sandstone 9% Coal 20%

[object Object],[object Object],Distribution of Roof Fall accidents by Time (in hours) Elapsed after Blasting 1997-2006 2.01 & Above 39% 1.01 - 2.00 19% 0.51 - 1.00 12% 0.00 - 0.50 30%

[object Object],[object Object]

[object Object],Year Total Roof fall accident SDL/LHD Accidents/Fatality Size of Fall (m) Type of support Remark 2002 23 2 (2) (i)1.8*1.6*0.2, (ii)0.6*0.4*0.4 Roof bolt Canopy could protect operator 2003 17 1 (1) 18*4.5*2.25 Mixed support 2004 26 1 (2) Main fall extended into working Mixed support 2005 16 1 (1) 5.0*4.5*1.2-1.5 Mixed support 2006 11 1 (1) 0.8*0.75*0.37 Roof bolt Canopy could protect operator Total 93 6 (7)

[object Object],[object Object],Distribution of Side Fall Accidents by Method of Working (2002-2006) Longwall & Others 0% Depillaring 58% Board & Pillar Development 42%

[object Object],[object Object],Distribution of side fall accidents by Thickness of Fall (2002-2006) 0.31 - 1.00 m 40% 0.16 - 0.30 m 44% 1.01 m & Above 0% 0.00 - 0.15 m 16%

[object Object],Distribution of Side Fall accidents by Time Elapsed in hours after blasting 2.01 & Above (78%) 1.01 - 2.00 (0%) 0.51 - 1.00 (11%) 0.00 - 0.50 (11%)

[object Object],Distribution of Side Fall accidents (Operation wise) Face Drilling 4% Drilling/Roof Bolting 0% Dressing 12% Reduction of Rib 0% Tramming/Travelling 8% Inspection 0% Repairing & Maintenance 0% Others 4% Loading/Shoveling/ Cleaning 61% Supporting (Conventional) 11%

[object Object],Distribution of side fall accidents (Designation wise) Contractor Worker 4% Supervisory Staff 0% Roof Bolter/Driller 4% Trammer 0% SDL/LHD/RH Operator 4% Dresser 8% Loader/Mazdoor/ Miner 72% Support Person 8%

[object Object],[object Object],Distribution of Side Fall accidents by depth of cover (2002-2006) 301-400 m 0% 201-300 m 33% 101-200 m 24% 0-100 m 33% 400 m & above 10%

[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object]

Reduction of risk from roof and side fall in Indian coal mines

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Viewers also liked

Viewers also liked (20)

Similar to Reduction of risk from roof and side fall in Indian coal mines

Similar to Reduction of risk from roof and side fall in Indian coal mines (20)

More from VR M

More from VR M (20)

Recently uploaded

Recently uploaded (20)

Reduction of risk from roof and side fall in Indian coal mines