ANGULAR DRILL-HOLE DESIGN IN MINERAL EXPLORATION (Ebook)

ANGULAR DRILL-HOLE DESIGN IN MINERAL EXPLORATION

Geometric Principles, Subsurface Targeting, and Design Workflows

Part of NC Gideon's Technical Training Series

Missing the target by a few degrees at the collar can mean missing the ore body entirely hundreds of metres downhole. This 102-page technical manual gives you the geometry, formulas, and step-by-step design workflow to angle every drill hole with confidence — whether you're targeting a shallow vein or a deep, dipping structure.

Written from 20 years of hands-on exploration experience across Nigeria and sub-Saharan Africa, this is not a theoretical textbook. It's a practical design reference built around the four fundamental parameters (AB, BC, BD, CD/DE), real trigonometric worked examples, and field-tested case studies from actual coal, gold, lead-zinc, and lithium exploration programmes.

What's Inside

• The complete geometric method for calculating collar offset, inclination, and true drilling depth
• True vs. apparent thickness, magnetic declination, and grid convergence — the corrections most manuals skip
• Drilling with the dip vs. against the dip, and why it changes your intersection angle
• A 17-step "don't miss the target" design method, plus deviation and target-envelope concepts
• Multi-hole patterns: fence design, fan design, and pattern selection for different ore geometries
• 3 fully worked field case studies (lead-zinc, gold-bearing shear zone, lithium pegmatite) with real and realistic exploration data
• 10 practice exercises with complete, verified solutions
• A structured drill-hole design worksheet you can use on your next programme
• 18 custom technical diagrams and 13 real field/project photos and figures
• AutoCAD workflow guidance, a 25-common-mistakes checklist, and a final QC/approval checklist, plus a drilling angle calculator template

Who This Is For

Exploration and mine geologists, geophysicists, drilling contractors, mining engineering students, and anyone responsible for siting and angling exploration drill holes who wants to stop relying on guesswork or rule-of-thumb angles.

Get your copy today using the link below and design your next drill hole right the first time.

https://selar.com/m/gideon-nwafor1377110

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