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压痕硬度压痕硬度试验法是使试件表面产生永久变形,根据产生变形所需要的载荷和变形的大小确定岩石硬度的方法。莫里斯(Morris)试验:此法是将碳化钨制成的顶角为90°、顶端圆弧半径为3.2毫米的圆锥形压头压入岩石试件表面。测定试件开始产生岩屑之前的载荷F(磅)和压入量U(英寸)。这种试验主要测试对象是硬岩。可以说U/F与使用球齿滚刀的隧道
Indentation hardness Indentation hardness test method is to make permanent deformation of the specimen surface, according to the deformation and load required to determine the size of the deformation method of rock hardness. Morris test: This method is a tungsten carbide made of apex angle of 90 °, the top arc radius of 3.2 mm cone pressure into the rock specimen surface. The load, F (pounds), and the amount of indentation, U (inches), before the test piece started to produce cuttings were measured. The main test of this test is hard rock. It can be said that U / F and the use of the ball hob hob tunnel