Correlation evaluation between UCS and Is50 based on specimen dimensions
DOI:
https://doi.org/10.54753/cedamaz.v12i2.1712Keywords:
Compression, Stability, Mining, Resistance, Rock.sAbstract
In the development of mining activities, both open pit and underground, it is important to determine certain properties of the rocks present in the outcrops found, one of them is the unconfined compressive strength (UCS), since through this and other in situ, the stability of structures can be assessed. The UCS is evaluated by permanently sending samples to the laboratory, which is often tedious, complicated and expensive, so an alternative in the field is the assessment of the Point Load Test Index or Is 50, which is obtained from a more accessible way. The relationship that exists between the UCS and the Is 50 is proposed by several authors, but many times these theoretical correlations do not reflect reality, because there are variables that involve considerable variations and consequently distort the evaluation of the UCS. It is proposed to establish certain guidelines to find a correlation that maintains a concordance between the UCS and the Is 50, with those exposed in the theory and in this way have a greater reliability of the calculations and results. One of the guidelines is to establish the geometry of the test specimens, specifically their dimensions. Three groups of andesite specimens have been proposed, with approximate dimensions of 5x10x10 cm, 5x5x10 cm and 5x5x5 cm and the results obtained are encouraging, we can also conclude hat the proposed methodology should be introduced for field processes in mining projects.Metrics
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