Advances in Civil Engineering / 2020 / Article / Tab 1 / Research Article
Numerical Simulation of Split-Hopkinson Pressure Bar Tests for the Combined Coal-Rock by Using the Holmquist–Johnson–Cook Model and Case Analysis of Outburst Velocity (ν /m·s−1 ) Specimen number Specimen size D × L (mm × mm) Sandstone: coal: sandstone combination ratio Maximum strain rate ( /s−1 ) Destructive strain (ε b/10−3 ) Σmax (Mpa) Destruction 5.008 MY1 75 × 40 1 : 1 : 1 126.97 10.2 12.70 Broken 5.712 MY2 75 × 40 1 : 1 : 1 143.98 14.2 18.23 Broken 6.371 MY3 75 × 40 1 : 1 : 1 162.56 12.2 21.98 Broken 6.754 MY4 75 × 40 1 : 1 : 1 170.66 13.3 25.21 Broken 7.222 MY5 75 × 40 1 : 1 : 1 173.48 16.4 30.06 Broken 4.590 MY12 75 × 40 2 : 1 : 1 110.41 12.4 8.65 Broken 5.062 MY11 75 × 40 2 : 1 : 1 121.93 10.7 10.64 Broken 6.136 MY10 75 × 40 2 : 1 : 1 150.53 10.4 19.24 Broken 6.205 MY9 75 × 40 2 : 1 : 1 150.07 9.8 24.43 Broken 7.165 MY8 75 × 40 2 : 1 : 1 174.26 14.0 19.69 Broken 7.671 MY7 75 × 40 2 : 1 : 1 184.01 16.3 35.28 Broken 6.660 MY13 75 × 40 1 : 1 : 2 158.03 10.3 32.25 Broken 7.140 MY14 75 × 40 1 : 1 : 2 179.00 10.5 11.78 Broken 7.584 MY15 75 × 40 1 : 1 : 2 178.48 12.9 36.46 Broken 8.093 MY16 75 × 40 1 : 1 : 2 195.49 10.4 17.75 Broken 8.022 MY17 75 × 40 1 : 1 : 2 186.91 14.2 43.24 Broken 8.791 MY18 75 × 40 1 : 1 : 2 192.42 11.8 23.34 Broken 5.880 MY23 75 × 40 1 : 2 : 1 149.79 9.0 15.10 Broken 6.508 MY19 75 × 40 1 : 2 : 1 162.62 8.0 15.30 Broken 7.054 MY20 75 × 40 1 : 2 : 1 171.24 13.5 14.02 Broken 7.465 MY21 75 × 40 1 : 2 : 1 182.30 12.4 22.41 Broken 8.200 MY22 75 × 40 1 : 2 : 1 192.42 14.0 27.10 Broken