Construction For Dismantling Of Old Unused Air Crossing Along 3Wd And 4Wd At 5L 13L And 21L And In Replace Construction Of 2 Nos Ventilation Stopping At 13L And 21L In Between 2Wd And 3Wd In Working Of R Vi Chora Seam For Chora 7 And 9 Pit Formaintaing Proper Ventilation Circuit In The Mine Of Chora 7 And 9 Pit Colliery Under Kenda Area Ecl.