# Study of the Relationship between Mode I Fracture Toughness and Rock Brittleness Indices
## 2 Materials and Methods
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Reference** & **Rock Type** & **Test Method** & \begin{tabular}{c} **K\({}_{\mathbf{IC}}\)** \\ **(MPa\(\cdot\)m\({}^{\mathbf{0.5}}\))** \\ \end{tabular} & \begin{tabular}{c} \(\mathbf{\sigma_{t}}\) \\ **(MPa)** \\ \end{tabular} & \
\begin{tabular}{c} \(\mathbf{\sigma_{c}}\) \\ **(MPa)** \\ \end{tabular} &
\begin{tabular}{c} \(\mathbf{\varepsilon}\) \\ **(GPa)** \\ \end{tabular} & \(\mathbf{\upsilon}\) \\ \hline \multirow{6}{*}{[60]} & Ankara andesite & SCB & 0.936 & 7.000 & 82.840 & 12.334 & 0.150 \\ \cline{2-7}  & Ankara andesite & CCNBD & 1.446 & 7.000 & 82.840 & 12.334 & 0.150 \\ \cline{2-7}  & white Afyon marble & SCB & 0.561 & 5.130 & 52.320 & 34.294 & 0.120 \\ \cline{2-7}  & white Afyon marble & CCNBD & 1.088 & 5.130 & 52.320 & 34.294 & 0.120 \\ \hline
[61] & Pink Ankara andesite & SCB & 0.980 & 7.290 & 83.160 & 12.330 & 0.160 \\ \hline \multirow{6}{*}{[60]} & Middleton limestone & CB & 0.732 & 3.840 & 47.760 & 27.520 & 0.230 \\ \cline{2-7}  & Harrycroft limestone & CB & 0.817 & 4.580 & 53.060 & 25.450 & 0.250 \\ \cline{2-7}  & Montclie sandstone & CB & 1.178 & 6.150 & 76.310 & 15.920 & 0.130 \\ \cline{2-7}  & Wredon limestone & CB & 1.695 & 10.150 & 156.730 & 57.170 & 0.280 \\ \cline{2-7}  & Penryn granite & CB & 1.829 & 10.580 & 132.360 & 39.100 & 0.290 \\ \cline{2-7}  & Pennant sandstone & CB & 2.097 & 14.020 & 162.190 & 39.070 & 0.310 \\ \cline{2-7}  & Whitwick andesite & CB & 2.174 & 14.490 & 139.200 & 63.600 & 0.230 \\ \cline{2-7}  & Bolton hill diorite & CB & 2.215 & 15.770 & 128.810 & 54.450 & 0.340 \\ \cline{2-7}  & Ingleton greywacke & CB & 2.382 & 15.190 & 226.260 & 57.040 & 0.170 \\ \cline{2-7}  & Nuneaton quartzite & CB & 2.440 & 12.990 & 138.580 & 36.400 & 0.240 \\ \cline{2-7}  & Clie hill diorite & CB & 2.770 & 18.420 & 274.820 & 64.180 & 0.280 \\ \cline{2-7}  & Cornish greywacke & CB & 3.149 & 15.390 & 165.360 & 49.620 & 0.250 \\ \hline
[56] & Brisbane tuff & CCNBD & 1.129 & 11.500 & 143.500 & 22.000 & 0.240 \\ \hline
[6] & Suizhou Granite & SCB & 1.741 & 12.400 & 240.000 & 50.000 & 0.240 \\ \hline
[57] & Kimachi sandstone & SECRBB & 0.460 & 4.820 & 59.000 & 8.230 & 0.220 \\ \hline
[58] & Kimachi sandstone & SCB & 0.589 & 4.900 & 66.900 & 13.200 & 0.180 \\ \cline{2-7}  & Kimachi sandstone & CB & 0.795 & 4.900 & 66.900 & 13.200 & 0.180 \\ \hline \multirow{6}{*}{[59]} & Barre granite & CB & 1.890 & 12.700 & 212.000 & 82.000 & 0.160 \\ \cline{2-7}  & Barre granite & CCNBD & 1.800 & 12.700 & 212.000 & 82.000 & 0.160 \\ \cline{2-7}  & Laurentian granite & CB & 1.800 & 12.790 & 259.000 & 92.000 & 0.210 \\ \cline{2-7}  & Laurentian granite & CCNBD & 1.830 & 12.790 & 259.000 & 92.000 & 0.210 \\ \cline{2-7}  & Stanstead granite & CB & 1.440 & 7.880 & 173.000 & 66.000 & 0.160 \\ \cline{2-7}  & Stanstead granite & CCNBD & 1.220 & 7.880 & 173.000 & 66.000 & 0.160 \\ \hline
[50] & Hunan Granite & CSTBD & 0.863 & 7.000 & 139.000 & 48.100 & 0.260 \\ \hline
[55] & Johnstone & SCB & 1.950 & 0.420 & 2.000 & 200.000 & 0.300 \\ \hline \multirow{6}{*}{[33]} & Gabbro & SECRBB & 2.290 & 11.120 & 132.150 & 42.980 & 0.180 \\ \cline{2-7}  & Gabbro & CB & 2.720 & 11.120 & 132.150 & 42.980 & 0.180 \\ \cline{2-7}  & Gabbro & SCB & 1.580 & 11.120 & 132.150 & 42.980 & 0.180 \\ \cline{2-7}  & Gabbro & SNSRB & 1.970 & 11.120 & 132.150 & 42.980 & 0.180 \\ \cline{2-7}  & Gabbro & BDT & 2.110 & 11.120 & 132.150 & 42.980 & 0.180 \\ \hline \multirow{6}{*}{[19]} & Shizhu Shale & CCNBD & 1.240 & 8.010 & 118.100 & 24.957 & 0.328 \\ \cline{2-7}  & Shizhu Shale & CCNBD & 1.280 & 8.243 & 54.200 & 20.687 & 0.251 \\ \cline{2-7}  & Shizhu Shale & CCNBD & 1.413 & 9.170 & 78.600 & 17.977 & 0.285 \\ \cline{2-7}  & Shizhu Shale & CCNBD & 1.593 & 9.638 & 105.900 & 16.803 & 0.309 \\ \cline{2-7}  & Shizhu Shale & CCNBD & 2.200 & 12.840 & 118.400 & 13.827 & 0.371 \\ \hline \end{tabular}
\end{table} 
Table 1: Literature data used in this paper.