How to improve mechanical hard rock excavation?

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?

Activated rock excavation machines – vision or fiction?!

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?!

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