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?

Alternative rock-cutting lab at Montanuniversitaet Leoben

The Chair of Mining engineering at Montanuniversitaet Leoben has a strong focus on alternative rock fragmentation technologies. The major focus lies on high-power microwave irradiation for pre-conditioning hard rocks prior to mechanical excavation. The available laboratory infrastructure consists of a 30¬†kW microwave fracturing apparatus, fully equipped rock mechanics and micro-analytical laboratories and extended computer infrastructure … Continue reading Alternative rock-cutting lab at Montanuniversitaet Leoben

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