...自然科学版、英文版） 关键字: 矿柱;硬岩;裂纹;突变理论;稳定性;临界载荷;纵向劈裂[gap=1071]Key words: pillar; hard rock mass; crack; catastrophe theory; stability; critical load; longitudinal..
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For hard rocks as granite, rock mass class is mostly associated with discontinuities.
花岗岩这样的硬质岩石，其岩体质量与结构面关系极为密切。
The REE contents of 84 placer gold samples and 7 hard rock gold samples in Heilongjiang province are determined by plasma mass spectrographic analysis.
对黑龙江省84个砂金样品及7个岩金样品，用等离子质谱仪分析了它们的稀土元素含量。
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