Western Coalfields Limited Tender

Mechanized hydraulic roof bolting by using DGMS approved hydraulic roof bolting machine complete with hydraulic power pack with drill rod and bit for drilling of holes and grouting of roof bolt with resin capsule, which includes transportation of roof bolt, bearing plate, nut, resin capsule, W-strap etc from track end to work site, drilling of holes of 1.5 m length in roof or side in u/g gallery and grouting of roof bolt with resin capsule and fixing of bearing plate and nut as per instruction of engineer in charge, also anchorage testing of 10% of roof bolts. Also including making of scaffold or platform, shifting of machines but excluding resin capsule, bearing plate, nut, W-strap and roof bolt. Note: 1. Hydraulic roof bolting machines: A separate Hydraulic roof bolting machine must be provided for each LHD machine, as frequently shifting the Hydraulic roof bolting machine takes considerable time, resulting in delays in support activities, which indirectly hampers production. (Currently, the 29Dip-II District require 03 Hydraulic roof bolting machines.) 2.Anchorage Testing: Anchorage testing of 10% of the roof bolts grouted per day must be conducted, and tags should be fixed to the tested bolts for identification. 3.Transportation: Transportation of roof bolts, bearing plates, nuts, resin capsules, W-straps, etc., from the track end to the work site is required. 4.Drilling and Grouting: Drilling of 1.5-meter holes in the roof or side of the underground gallery, grouting of roof bolts with resin capsules, and fixing of bearing plates, nuts, and W-straps must be carried out as per the instructions of the engineer in charge and in accordance with DGMS (Directorate General of Mines Safety) permission for the specific panel.

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