In terms of safety and economic efficiency, the automation of underground extraction machinery is one of the most significant goals in mining. One major challenge in rock cutting is to adapt process parameters to variable rock conditions. The guidance of such extraction machines today is still dependent on an experienced machine operator who particularly listens … Continue reading Acoustic Fingerprint on Rock Cutting Machines and Their Implications for Excavation
Mechanical rock excavation processes ensure an almost continuous extraction process when extraction, loading and transport can be combined into a single process. Over the past decades a lot of reserach was carried out to improve excavation technologies by a so-called activation of excavation processes e.g. by high pressure water jets or through an activation of … Continue reading Activated rock excavation machines – vision or fiction?!
‘It is always dark ahead of the pick!’ This centuries-old miners’ expression reveals the still persisting uncertainty about rock properties during exploration and extraction processes. It is still difficult to predict what a drill rig or a cutting machine will encounter during operation. Therefore, during the RealTime Mining project different sensors or sensor combinations were … Continue reading Machine performance and Acoustic fingerprints of cutting and drilling
This paper describes the influence of high-power microwave irradiation on the forces needed to cut granite with a conical pick. Granite samples have been irradiated with 24 kW at 2450 MHz with an open ended waveguide. The effect of microwave treatment was assessed by linear cutting tests with a conical pick. Microwave irradiation lead to … Continue reading Experimental Study on Microwave Assisted Hard Rock Cutting of Granite