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DRUMMOND 2

In Our Operation Highwall MINING Greater Efciency and Productivity Developed with North American technology, a Highwall Mining System is an ideal method for underground coal extraction in areas that are beyond the economical limits of the mine by conventional surface mining methods. This system is the perfect combination between maximum productivity and easy mobility. What is Highwall mining? Highwall mining is a method in which a machine is used to maximize coal extraction from a coal reserve in which most other mining methods have been exhausted due to unfeasible economic or geotechnical limits. The machine is located on the pit floor and performs a cut with a rectangular unit (cutter head) that cuts and follows the coal seam underground to a maximum depth of around 300 meters. The module is pushed by 2 hydraulic cylinders that apply pressure to a series of push beams that at the same time transport the extracted coal towards the surface. 1The machine is anchored to the terrain at the selected spot determined by a team of engineers. The anchoring point is determined through ground studies, slope of the terrain, and a GPS reference. 2The cutting head works through hydraulic force. To achieve the recovery of the coal, the cutting head is moved from top to bottom of the coal seam while the steel bits on the cutter head cut the coal underground. Cutting head Anchoring system Reel and supply chain Methane and gamma ray sensors 10 www.drummondltd.com


DRUMMOND 2
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