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
The pre-weakening of a rock mass prior to the cutting process could lead to a breakthrough solution for hard rock cutting. Once feasible it could be the key to developing continuous mining methods for base and precious metals that are currently predominantly mined using drill and blast. At RWTH Aachen University Rock Cutting Center hard … Continue reading Pre-weakening of hard rock with waterjet – potential breakthrough solution for hard rock cutting