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掘进机能将巷道全断面一次掘成,实现了采、装、运、支等工序的综合机械化,但现有的岩石掘进中,由于使用的刀具只限于挖掘中硬岩,对于硬岩则会使刀具急剧磨损,从而影响了掘进速度和成本。如铣削式掘进机的割刀,当岩石抗压强度大于1000公斤/厘米~2时,由于割刀磨损得太厉害,这类掘进机就不适用了。对于滚压式掘进机使用的盘形滚刀,虽然可以适应稍硬一些的岩石,但如果岩石抗压强度超过2000公斤/厘米~2以上的中硬岩石,该机也不能经济而有效地工作。为了使岩石掘进机能经济地在硬岩中工
The tunneling machine can excavate all the sections of the roadway at one time and realize the comprehensive mechanization of mining, loading, transporting and supporting processes. However, in the existing rock tunneling, since the tools used are limited to hard rock excavation, hard rock Tool wear and tear, thus affecting the speed and cost of driving. Such as milling machine boring machine cutter, when the rock compressive strength is greater than 1000 kg / cm ~ 2, due to blade wear too much, this type of boring machine does not apply. For the disc cutter used in roller-type roadheader, although it can adapt to a bit harder rock, it can not work economically and effectively if rock compressive strength exceeds medium hard rock of more than 2000 kg / cm ~ 2 . In order to enable rock-drilling machines to work economically in hard rock