It is important to have reliable prediction methods for mechanical excavation tools. I.e. when pre-damage methods like high-power microwaves, lasers, water jets or others are applied theoretical investigations on the possible improvements are inevitable. Montanuniversitaet Leoben performed two different studies on the subject (one for roadheaders, one for full-face tunnel boring machines). See the abstracts … Continue reading How to improve mechanical hard rock excavation?
With the increasing complexity of currently mined deposits, their depth and the long lead up time to first prodcution, and many more ecologic and economic factors traditonal mining methods come to their limits. There is a strong need to shift current economic boarders of excavation of raw materials.
New, alternative fragmentation concepts play a very impottant role in this future development.
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