CORE STORAGE & HANDLING
Alpha Beta Core Tool Features & Benefits
»» Measure the α & β angles of your core rapidly and easily »» Lightweight anodised aluminium »» Easy to use and foolproof »» No need for tapes and protractors »» Caters to both whole and broken core The Alpha Beta Core Tool makes measuring α & β angles a simple task. The design and concept for this device evolved from the frustration with past techniques involving tapes and protractors - which are both easily misplaced and less efficient to use. This device ensures an accurate and easily attainable way to collect data. Used by geotechnicians and the like. Suitable for both whole and broken core samples. α: angle of planar feature relative to core axis that is measured along the longest axis of the ellipse β: angle of the circumference between the orientation reference line and the long axis of the ellipse Shims are flat, elongated metal strips that are glued to the core tool to convert it to accommodate other core sizes. These are sold in sets of 3. SKU
DESCRIPTION
UOM
1125-01001-N2
To suit N2 core samples
Each
1125-01000-H
To suit H core samples
Each
1125-01001-N
Shim kit to convert N2 tool to N
Set of 3
1125-01001-N-N3
Shim kit to convert N2 tool to N3
Set of 3
1125-01000-H3
Shim kit to convert H tool to H3
Set of 3
270° 225°
90° 180°
135°
Set of 3 shims applied to an N2 alpha beta core tool at 225°, 180° and 135° angles to convert it to accommodate N core samples (this can be done with the H alpha beta core tool as well). Core Dip Angle, α (measured relative to core axis)
α Angle
Section Parallel To Maximum Dip Vector
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How to use the Alpha Beta Core Tool 1
Orientation line (bottom of hole) with down-hole direction marked
3
Rotation/β angle
Core-structure/α angle
Head of the device
Step 1: Slide core into the barrel with the down hole direction and the apex of the planes facing towards the head of the device. You can trace the outline of the ellipse you are measuring as a guide (this is optional).
2 Apex of the bottom of ellipse set as 0°
β angle measured clockwise from 0° to orientation line
Step 3: In order to measure the maximum dip/ α°, ensure that the apex/β axis is still aligned to the 0° mark, as per the previous step. Obtain measurement of the curve of the α angle by reading the measurement on the α scale.
β angle 350°
Step 2: To get the β angle, align the apex or the bottom of the ellipse (down-hole end) formed by the planar feature that is to be measured with the zero (0°) graduation on the tool - read this in a clockwise direction from the banding apex to the orientation line.
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4
Step 4: With this data obtained, use this to calculate orientations using α-β-γ values and drillhole survey data. This information is commonly used in geotechnical programs.
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