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Study on Roadheader Cutting Load at Different Properties ...

The Scientific World Journal is a peer-reviewed, Open Access journal that publishes original research, reviews, and clinical studies covering a wide range of subjects in science, technology, and medicine. ... As the direct working mechanism of roadheader, cutting head works in poor working conditions. ... Song et al. studied rock debris ...

how does a roadheader work - muntiparaisofoundation.org

CT-069-1 May 23-26, Productivity of Tunnel Construction Using Road-Headers A. Obeidat1, H. Al-Barqawi1, T. Zayed1 and M. Amer2 1 Department of … ONLINE INQUIRY washing machine work - …

Roadheader excavation performance

Roadheader excavation performance - geological and geotechnical influences ... recently published by Deketh et al. (1998). Looking at the diagram inFigure 6, the quality of the ... During the excavation works of the underground of Nuremberg (Bavaria, Germany) in sandstones and clay-siltstones of the ...

(PDF) Roadheader applications in mining and tunneling

Roadheader applications in mining and tunneling Article (PDF Available) in Mining Engineering 50(3) · January 1998 with 2,565 Reads Cite this publication

(PDF) Performance of a roadheader under harsh working ...

Excavation, muck loading and support works are performed separately due to safety concerns in the wet and inclined sections which reduced the machine utilization time from 38% to 8%.

Comparative studies on the performance of a roadheader ...

Comparative studies on the performance of a roadheader, impact hammer and drilling and blasting method in the excavation of metro station tunnels in Istanbul ... (Bilgin et al., 2002, Ocak et al., 2007). ... since it works in Trakya formation having the lowest mean value RQD of 30% compared to Kartal formation having mean RQD values of 55% as ...

Geotechnical Risk Assessment and Selection of Suitable ...

Geotechnical Risk Assessment and Selection of Suitable Roadheaders for Tabas Coal Mine Project, Iran ... Geotechnical Risk Assessment and Selection of Suitable Roadheaders for Tabas ... some research works focusing on performance prediction of roadheader. (Bilgin et al., 2004), (Ebrahimabadi et al., 2011a, 2011b, 2012, ...

Research on the Strength of Roadheader Conical Picks Based ...

Research on the Strength of Roadheader Conical Picks Based on Finite Element Analysis Xueyi Li1, Yonggang Lv1, ... When roadheader works, alloy tool bit ... 522 The Open Mechanical Engineering Journal, 2015, Volume 9 Li et al. Fig. (1). Picture of failure forms of conical picks.

roadheader works al - blaue-funken-eupen.be

roadheader works al Study on Roadheader Cutting Load at Different Properties ... The Scientific World Journal is a peer-reviewed, Open Access journal that publishes original research, reviews, and clinical studies covering a wide range of subjects in science, technology, and medicine. ...

1090. Numerical simulation of rock fragmentation process ...

Roadheader is widely used in rock cutting and is one of the key equipments for underground excavation [1, 2]. The roadheader pick plays a vital role when the roadheader works owing to its ability to cut rock directly. Thus studies on the rock fragmentation mechanism of …