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Fletcher HDDR Dual Mast Coal Bolter

When the customer has questions, Fletcher answers with custom-built mining equipment tailored to their underground operation. The Fletcher model CHDDR-AC is a remote dual-boom bolter, which removes operators from the face area. The machine is equipped with material handling and a bolt carousel that has the ability to secure a complete heading, which aids in alleviating some of the labor burdens placed on operators. Fletcher has made the ability to remove the operator from the front of the machine in coal mines a reality. The bolt module for the CHDDR-AC implemented a dual mast design. Each mast is equipped with individual crowds to reduce the roof profile of the mast. One mast is dedicated to drilling the hole and inserting the resin while the other mast is dedicated to installing a bolt. The dual mast design eliminates the need to stowe and manipulate the drill steel providing the ability to rib bolt. The resin is inserted using pneumatics. The resin inserter is fixed to the drill mast assembly and uses the same roof reference guide as the drill steel. This eliminates the potential for misalignment providing reliable resin insertion. The bolt carousel is equipped for a capacity of 16 bolts. Several bolts can be loaded in the carousel from one position, meaning the carousel does not need rotated after inserting only one bolt.