UNDERGROUND DRILLING
industry . This common platform approach may be part of the solution and the way forward . Plus , this universality provides advantages in job site efficiency and - with the common parts , service , and maintenance - could help reduce costs .”
Komatsu says it also listened to customer input that helped it totally redesign the operator cabin . The input devices and zone of comfort used for enclosure design are driven by ISO 6682 . A few key points were given about the common platform approach as it relates to the operator environment : n The outer shape and dash panels are common between canopy and cabin for both machines . n Both new products share the identical layout and components . This universality makes for greater efficiency and can have major advantages when it comes to operator training and adoption . n The cabin and canopy use similar harness and input devices except for wipers , washers and climate control . In terms of other features on the ZJ21 drill , despite being 1 m longer on average than its competitors in the class , this machine can effectively navigate a 90-degree intersection in a 3 m by 3 m heading . Plus , a 16 ft drill steel “ allows for the longest round and highest productivity in the class .” This longer boom
provides the machine with a significant usable face coverage of up to 66 square metres , making this machine easily capable of backing up a twoboom jumbo in larger drives . With an overall operating height of 2.8 m and maximum width with levelling jack extended to 2.7 m , operators can efficiently use this machine in small headings .
The ZB21 is a bolter on this new common platform . The ZB21 boasts the same operating dimensions and is capable of handling up to an 8 ft bolting head . Its bolting fan pattern offers 7 m on the walls , 7.5 m on the backs and a 50 square metre face coverage . The bolter can bolt in any direction . Plus , the bolting head technology enables mines to perform 100 % of the bolting cycle from the operator ’ s enclosure using a patented screen handler design and innovative chemical injection system . The bolting head also leverages many uniquelydesigned polyurethane-casted components that decrease weight and reduce parts count .
The ZJ21 jumbo has a unique and versatile boom design , intentionally engineered to help protect the crew , control costs and boost productivity . The underslung boom configuration limits the impact of feed length on the outside turning radius , allowing drilling teams to drill up to a 15.5 ft hole in a 3 m by 3 m heading , while still effectively navigating a 90-degree turn or intersection .
The boom design also ensures zero contact with the operator ’ s station or the carrier or levelling jacks when drilling anywhere on the face , including the lifters — even in the longest feed configuration and fully retracted . Komatsu states : “ This helps protect the operator and reduces the possibility of damage and the resulting increased repair costs . This boom design also provides a profile that matches the typical mining tunnel while delivering up to 66 square metres of coverage . This makes it easier for your operator to perform vital tasks - drilling lifters , perimeter holes , up and down ramps , truck loading bays , and service bay , cross cuts and even backing up two boom jumbos in larger drifts .”
An updated bolting head design leverages the legacy of Timberock ( acquired June 2019 ) while ensuring 100 % of the cycle is completed from the protection of the operator ’ s compartment . Again , the bolting head leverages cast polymer components to reduce weight and improve durability , which helps in controlling operating and rebuild costs . “ We ’ ve used polymer components to provide additional forgiveness in many areas such as the bolt centralisers , bolt carousel , bolt driver , stinger pad and rear feed plate . These components also reduce the need for adjustment and the overall number of moving parts , ensuring optimal alignment for bolt installation — all factors that may help you avoid downtime .”
Another notable feature of the bolting head is
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