Rock drilling tools and characteristics of rocks

Different rocks have different physical properties (such as density, humidity, magnetism, expansibility, dissolution, thermal conductivity, porosity, electrical conductivity, permeability) and mechanical properties (such as strength, elasticity, hardness, explosiveness, drillability, abrasion, plasticity, brittleness, toughness, stability, sturdiness, stress wave transmission speed, etc.) that vary greatly. Therefore, when developing high-performance rock drilling tools, attention should be paid to the characteristics of the rocks and producing rock drilling tools suitable for various types of rocks.