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Further investigations on roadheader's performance is conducted by Copur et al. (1998) in mining projects, leading to a set of formulas for predicting transverse roadheaders as below: ICR ¼ 27:511e 0:0023RPI ð6Þ PRI ¼ PW=r c ð7Þ where PRI is the roadheader penetration index (kW ton/ MPa), P is the power of cutting head (kW), W is the …

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While the roadheader market has been dominated by the American and Swedish manufacturers, Chinese and Japanese manufacturers have not been slow to develop their ranges of roadheaders. The Mitsui Miike Machinery Co Ltd launched its first roadheader, the first roadheader to be manufactured in Japan and at 15 tonne, back in 1968.

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