Construction Of (08) Eight Nos. Of P.C.C Ventilation Stoppings In Between 56L And 57L Off 0 Dip And 1 Dip In Between 01 And 02 Dip Of 57L, 58L, 59L, 60L, 61L And 62L In 5/6 Incline Of Shampur-B Colliery.