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凡采矿工作者,无不关心岩石的坚固性。我们常遇到的普氏坚固性系数f,是从苏联学来的。这一系数在苏联也是在不断演变,逐渐改进的,可是传到了我国却凝固起来了,值得引起重视。 (一) 年表 1909年普氏首次提出坚固性的概念 1911年,f=R/150 1921年,f=R/80 1926年,f=R/100 1940年推行岩石统一分级法,“术语坚固性应代之以术语凿岩性、爆破性等”。
All mining workers, are all concerned about the ruggedness of the rock. We often encounter Platts rugged coefficient f, was learned from the Soviet Union. This coefficient is also evolving and gradually improving in the Soviet Union, but it has come to solidify in our country and deserves our attention. (I) Chronology Platts first proposed the concept of solidity in 1909 1911, f = R / 150 1921, f = R / 80 1926, f = R / 100 1940 The Rock Unified Grading Act Sex should be replaced by the term rock drilling, blasting, etc. ".