How to Select DTH Borehole Diameters for Different Geological Conditions:Granite, Limestone, Sandstone?
DTH drilling is the core technology for precision blast hole construction in global mining, quarrying, and civil infrastructure. A major pain point for construction teams worldwide is incorrect hole size selection, which causes inefficiencies, excessive drill tool wear, poor blasting results, safety hazards, and significantly higher project costs. A key question arises: do different rock types require specialized DTH drilling hole diameters? The answer is yes. This guide provides a comprehensive, actionable framework for selecting hole sizes for the three most common rock types in blast operations—granite, limestone, and sandstone. It also breaks down core factors influencing diameter choices, helping operators and procurement teams make optimal decisions to reduce costs and boost efficiency.