मेलम्ची सुरुङ्गमा Curtain  grouting  को लागि drilling गर्दै गरेको अवस्था
Channel: Pusker
Date: 2020-12-08

Drill or drilling machine is a tool primarily used for making round holes or driving fasteners. It is fitted with a bit, either a drill or driver. for curtain drilling, drilling machine is an automatic with 1 m steam rod having bit 75 mm diameter. for this type of drilling work, designer have already submit the design pattern of hole which has to be drill. In this work 15 length have to drill and number of hole is about 54 nos . the process of drilling is as follows: first 5m drill and then do lugeon test then again drill 5m in same hole and do lugeon test like wise total 3 times drill and make 15 m hole.