Surrounding rocks classification plays a determinative role in the design and construction of tunnels. 摘要圍巖分類(lèi)對于隧道設計和施工起著(zhù)決定性的作用。
On the basis of the past schemes, new classifications of pyroclasts and the petrographic as well as the petrogenetic classification of pyroclastic rocks are proposed in this paper. 中國學(xué)者提出的火山碎屑巖分類(lèi)時(shí)間較早，有自己特色，在一定的范圍得到了應用。
