Mine Development
Mine wil be developed in panels. Barrier between two panels shall be one pillar thicks.Height of any gallery at any place shall not exceed 3m and the witdh shall not exceed 4.8m.For mechanised mining,DGMS may permit larger width.Size of pillar shall depend on depth from surface and width of the gallery.Minimum pilar size is prescribed in the regulations.Normally pillars shall rectangular in shape.No narrow main or advance heading shall be driven more than 3m ahead of the widened gallery.Seam shall not be developed by ug method where hard cover over the seam is less than 7.5.If hard cover is more than 7.5m but less than 15m, development shall be done with permission from DGMS.No warking shall be made within a distance equal to half the pillar size,for the depth from surface and a gallery width of 4.8m,from the the boundry of mine so that two adjacent mines have a barrier of one pillar. Where work is done in more than one seam,barriers at the boundary shall,as far ...