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minexpo highlights continued generating considerably less dust during the cutting process. Lower cutting speed also ensures low noise levels. The MSHA approved MB610 was specifi- cally developed for the U.S. market to meet the demand of maximum time between rebuilds. Most machines in the market need to be rebuilt within one or two years of operation. The design of this machine will at least double this time. With a weight of 112 short tons, it also provides ample cutting stability. The low minimum tram- ming height of 2 m allows efficient tram- ming of the machine within the mine infrastructure. Liebherr reduced the empty vehicle weight of the T 284 to increase payload. V engine rated at 565 kW (757 hp). Its operating weight is 127 metric tons or (280,000 lb) and the machine is equipped with an 8 m3 (10.5 yd3) backhoe or face shovel attachment. "We believe the R 9150 is a very impor- tant step in the development of a new Liebherr mining excavator range," said Dr. Jörg Lukowski, executive vice president, Liebherr Mining Equipment. "In the future, this machine will replace the R 984 C, a very successful excavator. Including previous models of the R 984, we have sold more than 1,000 of these machines in the past decade. After the completion of a test pro- gram in-house and in the field, we can con- firm that the R 9150 will be a very powerful and highly productive unit that will handle trucks up to 100 mt. In hard digging we have seen an even higher output from the R 9150 than from the R 984 C (+15 %), and the R 9150 is outperforming its competitors in this class." Ground Engaging Tools for Shovels MTG launched four new sizes and five new designs for its hammerless StarMet system. The EX sizes 240 and 500 were designed specifically for mining. The new StarMet sizes 15, 20, 30 and 40 are avail- able on the most popular MTG designs. The new product's main innovation con- sists of being the lightest and the one with the shortest tooth nose available on the market. It incorporates the new Bilateral MTG Twist fixing system (both the retain- er and the pin can be assembled on both sides of the adapter) that allows the user to introduce the pin through the most convenient side. November 2012 Sandvik Mining Offers the New Bolter Miner MB610 With the Bolter Miner MB610, Sandvik Mining introduced a more powerful gener- ation of longwall gateroad development machines. All Sandvik Bolter Miners have a unique sump mechanism, which enables them to cut and bolt at the same time. This is the key to high-speed gateroad development. Managing good control over dust at the face is a prime concern for the operator's health and safety. Sandvik know-how in cutting tools and machine design helped in designing a cutter drum with a very low cutting speed of 31 rpm, compared to the competition's 60 rpm. The lower cutting speed delivers high torque and higher cutting forces, as well as The mine floor has to be kept in good con- dition during cutting, when the maximum forces are transferred to the floor. The MB610 features four auto-stabilizers (two front and two rear) which ensure a very low ground pressure of 25 psi (17 N/cm2). The MB610 features a unique movement of cutter drum and loading pan, which allows independent movement of the cut- ter drum and loading table, enabling excel- lent maneuverability to cut a nice clean 90° cross cut within a short radius. The MB610 roof bolters can tilt 37°, allowing more flexi- bility in bolting patterns. The MB610 prototype was commissioned at CONSOL Bailey at the end of October 2011 and has consistently been the top performer since then. From November 1, 2011, to July 31, 2012, the machine has cut and bolted a total of 40,460 ft (12,230 m) of gateroad. GE Mining GE Mining unveiled its Invertex electric drive systems for underground vehicles. The The Bolter Miner MB610 was designed specifically for longwall road development. Continued on page 50 www.coalage.com 37