rock hardness reducer 岩石硬度减低剂
rock hardness ratio 岩石硬度比
rock hardness index 岩石硬度
hardness of rock 岩石硬度
rock indentation hardness 岩石压入硬度
hardness coefficient of rock 岩石硬度系数
As we know, inclining drilling, the depth of drilling and rock hardness is three factors influencing drilling production efficiency and cost.
钻孔偏斜、孔深、岩石硬度被公认为是影响钻探生产效率与成本的三大要素。
It is indicated that there is the best correlation between rock indentation hardness and integrated RMS of AE events.
结果表明：岩石压入硬度与声发射信号的积分rms有最好的相关关系。
It is possible to use the parameter integrated RMS to assess rock indentation hardness and further to predict rock drillability.
有可能利用积分rms这一参数来估价岩石压入硬度，并进一步预报岩石可钻性。
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