Design of suitable method for extraction of coal pillars in Kajora (RIX) seam at Madhusudanpur 7 Pit and Incline colliery, Kaora Area, ECL under surface features like pond, Line, houses, dwellings etc. at a depth of 35 to 50m. 7 Pit and Incline Colliery, ECL on the basis of filed data. Eastern Coalfield Limited, ECL: From to