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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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How to determine rock grade==strength
2024-09-03Strong, dense, and resilient quartzite, basalt, and various other particularly strong rocks. (f=20) II. Very strong granite, quartz porphyry, siliceous schist, relatively strong quartzite, strong sandstone, and limestone (f=15) Strong and dense granite, strong sandstone and limestone, quartz veins, strong conglomerate, and strong iron ore (f=10) IIIa Strong and sturdy sandstone, limestone, marb
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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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