自由断面掘進機の発展経緯と将来 [in Japanese] The Development of Roadheader and it's Future [in Japanese]
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Roadheader was developed as a heading machine of coal mine in 1 9 6 6 in Japan, following to other countries. At first, it cut coal seams. And it has been improved to cut more severe strata. In Japan there was a big market for digging tunnels in the field of civil engineerings. Roadheader has been widely used for a heading machine of tunnels in Japan. The specification to be attained for tunneling was slightly different from that of coal mine. To improve cutting abilities, a big cuttinng force and a machine stability is most important. But increase of cutting force is restricted by a machine weight. Because it is inevitable for a selecting cutting system to receive a reaction force by a friction of machine weight. In future Roadheader will become a more powerful and useful machine.
- Journal of MMIJ
Journal of MMIJ 114(10), 693-698, 1998-09-25
The Mining and Materials Processing Institute of Japan