Machine performance and Acoustic fingerprints of cutting and drilling

‘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

Experimental Study on Microwave Assisted Hard Rock Cutting of Granite

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

Pre-weakening of hard rock with waterjet – potential breakthrough solution for hard rock cutting

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