$WinLoG fracture spacing borehole log showing core recovery, RQD, fracture spacing, fracture index and lithology$ View Full Log

FS-01 Fracture Spacing Log

2-page log 1 Review Warning

MINING FRACTURE SPACING EXAMPLE

WinLoG Fracture Spacing Borehole Example

Core recovery and fracture-frequency measurements aligned with geology on a common depth scale.

This example presents the 50 ft FS-01 Fracture Spacing borehole from the North Ridge Fracture Characterization project. The two-sheet log combines flush return, drill rate, TCR, SCR, RQD, core size, fracture spacing and fracture index with detailed rock descriptions and lithologic symbols.

Automated validation reported 100% completeness, Good quality, 84% confidence, no errors and one review warning because bedrock begins at 0 ft. That condition can be valid where rock is exposed or overburden has been removed, but it should be confirmed against field records.

50 ft BoreholeFlush ReturnDrill RateTCRSCRRQDFracture SpacingFracture Index1 Review WarningXML Template

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Capabilities Demonstrated

What This Fracture Spacing Example Shows

Fracture Measurements

Spacing values in millimetres
Calculated fracture index
Depth-aligned interval records
Closely to widely spaced fractures
Direct comparison with lithology

Core Recovery

Total core recovery (TCR)
Solid core recovery (SCR)
Rock quality designation (RQD)
HQ core size
Continuous 10 ft run intervals

Drilling and Geology

Flush return percentage
Core drill rate
Five rock intervals
Detailed strata descriptions
Standard lithology legends

Validation

100% completeness
84% confidence
No validation errors
One shallow-bedrock warning
Quality rated Good

Fracture Spacing and Rock Quality Together

The fracture-spacing and index columns share the same depth intervals as TCR, SCR and RQD. This makes the expected relationship visible: closely fractured rock has a higher fracture index and lower RQD, while wider spacing corresponds to a lower index and improved rock quality.

Across the log, spacing increases from 45 to 420 mm, fracture index decreases from 22.2 to 2.4, and RQD rises from 25% to 90%. The profile provides a clear teaching example of fracture frequency and core-quality relationships.

Example Data