经过多年试验之后,南非的黄金生产厂家开始认识到,在一些矿山中,引进机械化凿岩的无轨采矿法,能解决传统采矿法所遇到的多种问题。当然,随着机械化采矿法效益的提高,人工费也必然要增加。但是,还有一些其它的因素,例如在井下某些场所从事繁重作业的矿工的抵制情绪 After years of testing, gold producers in South Africa began to recognize that the introduction of mechanized rock drilling in some of these mines can solve many of the problems encountered with traditional mining methods. Of course, with the improvement of mechanized mining law, labor costs will inevitably increase. However, there are other factors, such as the resistance of miners who engaged in heavy work in some locations downhole