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| 普氏岩石硬度指数苏联普罗托季雅科诺夫〈M.M. Пpотодьяконов〉20 世纪30年代提出普氏分级法。这一方法主要采用的分级指标为 f = Rc/10,式中 Rc 为岩块单轴抗压强度 MPa。用 f 值把岩石分成 20 个级别; 普氏冲击强度指数 | |||
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Protodyakonov coefficient of rock strength : 1 phrase in 1 subject |
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