符山铁矿于1980年6月开始使用CTJ700·3型气动掘进钻车,经过几年的实践,效果较好。一、主要技术指标符山铁矿1980年对凿岩钻车和气腿凿岩机进行了对比,其各项指标如表1所示。由表1可知,钻车与气腿凿岩机相比:循环进尺提高37.5％;循环时间减少23.6％;炮孔利用率提高7％;炸药消耗降低0.12公斤/米~3;工效提高13.8米~3/工·班。这均是正常生产时的统计,应该说,效果是不错的。 Fu Shan Iron Mine in June 1980 began using CTJ700 · 3-type pneumatic boring drill, after several years of practice, the effect is better. First, the main technical indicators Fu Shan iron ore drilling rig in 1980 and air leg rock drill were compared, the various indicators shown in Table 1. As can be seen from Table 1, compared with the gas leg rock drilling machine, the drilling footage is increased by 37.5%; the cycle time is reduced by 23.6%; the blast hole utilization rate is increased by 7%; the explosive consumption is reduced by 0.12 kg / m 3; the work efficiency is increased by 13.8 m 3 / Work · class. This is normal production statistics, it should be said that the effect is good.