roof bolting in ug by hiring of dgms approved portable hydraulic roof bolting machinewith wet drilling arrangement to drill 1.50 mtr / 1.80 mtr. long hole in roof with 27mm dia drill bit for anchoring 20 / 22mm dia roof bolts with resin capsules and fitting of bearing plates and w-strap ( as and when required ) and tightening of nuts in development panel at pali colliery ( note- hydraulic roof bolting machine with hydraulic oil & wet drilling arrangement, drill rod, drill bit and spray pump to be provided by contractor ) note- ( 1 ) the transportation of material ( i.e roof bolt rod, bearing plate, nuts & resin capsules ) from surface to work place shall be done by contractor. ( 2 ) electrical power and water at one convenient point for drilling machine will be arranged by management. ( 3 ) cable / water hoses from power pack to drill machine and starter shall be supplied by contractor ( 4 ) shifting of power pack & drill machine shall be done by the contractor. ( 5 ) all maintenance and related shifting will be done by contractor. ( 6 ) such arrangement shall be made that the roof bolt grouted / jammed by the contractor and the company ( secl ) are distinguishable.