L-D data of norite, granite, sandstone, limestone, marble, siltstone dry rock samples were used during the development and verification of the proposed research approach.
The L-D curves breakdown points of the norite rock samples were mostly even, matching each other and varying between 350kN-0.35mm and 400kN-0.75mm.
The L-D curves of granite samples show larger variation so that the curves of dark-grey weak granite samples are in irregular trends of path and failure.
The L-D curves of the granite-gneiss rock samples showed regular elongated trend-lines with smooth trails and slight path deviations changing between 155kN-0.25mm and 195kN-0.75mm.
The L-D changes of the red-sandstone samples demonstrated close trends through considerably even curves that varied between 32kN-0.35mm and 41kN-0.75mm.
Apart from a few test results, the L-D curves of the marble samples seem to follow parallel trend-lines with curly paths that show vast discrepancies of between 45kN-0.3mm and 84kN-0.6mm.
The Chinese limestone rock samples' L-D curves appeared to follow parallel trend-lines, except for a few, with highly twisted trails and had changing breakdown points between 155kN-0.4mm and 210kN-0.45mm.
The L-D curves of the siltstone rock samples showed irregular trend-lines with wavy and diverse trails.
The main focus was to detect the onset of failure points by utilizing the slope of the characteristic L-D data with reasonable accuracy.
In this study, a new approach is introduced to predict the onset of failure points of different types of rocks by evaluating L-D characteristics.