Shock and Vibration / 2016 / Article / Tab 2

Research Article

Research on Effects of Blast Casting Vibration and Vibration Absorption of Presplitting Blasting in Open Cast Mine

Table 2

Main characteristic parameters of rock stratum in the blasting area.

LithologyRock density ()Rock mass velocity ()Rock wave velocity ()Integrity coefficient ()Crack coefficient ()Wave impedance

Mudstone2.7 g/cm31273 m/s3744 m/s0.120.883.44 × 103 g/cm3·m/sMedium
Sandstone2.3 g/cm3796~1118 m/s1586~3226 m/s0.06~0.50.5~0.992.2 × 103 g/cm3·m/sEasy

Note: the integrated coefficient of rocks is determined by the square of the ratio of rock mass velocity to rock wave velocity, ; the crack coefficient of rocks, ; the wave impedance of rocks, .

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