UNDERGROUND DRILLING
operate in the harshest conditions of underground mining and can drill horizontal, vertical or cross-cut holes. Designed for operator comfort, these units can accommodate all different ground conditions. The Montabert HC series drifter and Intelsense drilling control system work seamlessly with all Joy jumbos, ensuring the best possible drilling performance.”
The Komatsu Mining Joy vein runner series including the Vein Runner II hydraulic drill jumbo single-boom hydraulic rig is designed for drilling vertical, horizontal and angled holes in underground production or development headings
In an effort to improve underground air quality, Joy jumbos are available with EPA and MSHA certified engines while a heavy-duty allmechanical powertrain with load-sensing hydraulics ensures a proven platform and a long service life. An environment controlled ROPS / FOPS certified cab is also an option. The ROPS / FOPS certified environmentally controlled operator’ s cab insulates the operator from noise, dust and vibration.“ A long list of innovative features sets Joy jumbo drills apart from the rest.” This includes lightweight aluminum feed with replaceable wear strips. The Komatsudesigned light weight feed assemblies are available in different length to accommodate a range of steel from 2.4 m( 8 ft) to 4.87 m( 16 ft) and feature replaceable wear rails and guides.
Komatsu’ s jumbo booms are designed for the harsh conditions of underground and comes with feature such as auto parallelism. Komatsu Mining offers Montabert HC50,
HC95, HC109 and HC110 drifters on all Joy hydraulic drill jumbos. Combined with Intelsense drilling controls, the company claims that Joy jumbos have the highest availability and the fastest drilling rates in the industry.“ The workhorse of any drill rig is the drifter. The Montabert HC series can provide our customers the lowest cost for drilling maintenance and consumables. Komatsu Mining also offers a drifter conversion program to retrofit Montabert drifters on other manufacturer’ s units.”
The Joy vein runner series including the Vein Runner II hydraulic drill jumbo single-boom hydraulic rig is designed for drilling vertical, horizontal and angled holes in underground production or development headings. It features a hydraulic percussion drifter designed to drive headings 5.61 m( width) by 5.3 m( height). The Joy drift runner series single-boom 1 SB hydraulic rig is designed for drilling vertical, horizontal and angled holes in underground production or development headings. It features one hydraulic percussion drifter designed to drive headings 5.74 m( width) by 6.34 m( height). The Joy drift runner series two-boom jumbo 2 SB is designed for drilling vertical, horizontal and cross-cut holes in underground production and development headings. It features two hydraulic percussion drifters designed to drive headings 8.89 m( width) by 6.36 m( height).
Doofor drills excelling on Mantis rigs in RSA
Rock drills major Doofor Inc and Fabchem Group of Johannesburg, South Africa are working together to offer the Southern Africa mining market functional drilling equipment. The Fabchem Group is the official distributor of the Doofor products in Sub-Saharan Africa. Fabchem, through its subsidiary, Conax Machine Solutions, manufactures, refurbishes and repairs roof bolters and hydraulic rock drills, with its flagship product being the Mantis Roof Bolter. The Mantis is offered with a Doofor DF530S hydraulic rock drill.
Recently, a client of Fabchem, in coal mining, achieved excellent results when they used the Mantis equipped with a Doofor rock drill, for developing through a dyke( hard rock). They had started the project using jack hammers, but it soon became clear that the project was unfeasible due to slow production rates. They were achieving an average penetration rate of 0.11 m / min or 18 minutes for every 2 m hole. They then tried another hydraulic rock drill, which achieved a penetration rate of 0.44 m / min or 4.5 min for every 2.0m hole, but reliability was poor. Fabchem then offered the client a Doofor DF530S rock drill mounted on the Mantis machine and it was a huge success. They achieved a penetration rate of 0.80 m / min, which meant they could now drill a 2 m round in 2.5 minutes, with excellent equipment availability.
At these drilling production rates, the project became viable and the client was very satisfied. These results were also shared at a meeting of the South African Colliery Managers Association in 2017. The mine has recently ordered another Mantis Roof Bolter / Face Drill, which is both diesel and electric powered, complete with percussion feed frame and Doofor DF530S rock drill mounted on it, for delivery at the end of June 2018.
The Doofor drifters are of very high quality, offer high production rates and are cost effective.“ We at Doofor are pleased to work with a manufacturing company such as Fabchem. With them we can offer strong technical support and spare parts service for our products in demanding underground conditions.”, explains Kalle Kuusento of Doofor Inc.“ We see a lot of potential for growth through customer satisfaction when they see the economy and reliability of our products.” IM
The Conax Mantis face drilling rig
38 International Mining | JUNE 2018