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关于岩粉密度对钻探机工作效率的影响问题,在所有的著作中,阐述多不详尽。到现在为止,凡是过去发表过的有关冲击钻探工作的理论,不是完全避免谈这一问题,就是仅止于一般的叙述。为了解决这个问题,著者在一个矿山进行了试验。试验的最初阶段,是先考察了钻探机在一般工作环境下的工作情况。当时便在具有比重3T/m~3和假定抵抗压碎强度1400kg/cm~2的橄榄辉长辉绿岩中进行
The impact of rock dust density on the working efficiency of a drilling machine is not exhaustive in all the writings. Until now, all the theories published in the past concerning percussive drilling did not completely avoid talking about this issue, they just ended up in a general narrative. In order to solve this problem, the author experimented in a mine. The initial stage of the test was to examine the working conditions of the drilling machine under normal working conditions. At that time it was carried out in an olive gabbro with a specific gravity of 3T / m ~ 3 and an assumed resistance to crushing strength of 1400 kg / cm ~ 2