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Requirements for Drilling in Rock Drilling and Blasting Operations
2024-09-03Generally speaking, drilling is described by four characteristics: longitude, depth, straightness, and stability. 1. Hole diameter The diameter of the borehole depends on the purpose of using it. There are many factors that affect the selection of holes in blasting drilling operations.
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Rock drilling tools and characteristics of rocks
2024-09-03Different 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 var
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