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通过Ｘ射线粉晶衍射成分分析，结合岩石点荷载强度试验研究，查明国内外首次发现的此隧道部分砂质泥岩发生岩爆活动的内在原因。
Based on the X-ray powder diffraction analysis and the experimental study of rock point load strength, the internal causes of the rockburst activity of some sandy mudstone in this tunnel were first discovered at home and abroad.