Table 1.
Comparison of mechanical parameters between C50 concrete and jointed gneiss.
Fig 1.
Schematic diagram of the test site and vibration measurement points.
(a) Schematic diagram of the test site. (b). Sensor layout.
Table 2.
Optimized experimental delay scheme for inter-hole delay time.
Table 3.
Optimized experimental delay scheme for inter-row delay time.
Fig 2.
Peak particle velocity (PPV) and vibration reduction rate of different inter-hole delay schemes.
(a) Free face reverse PPV. (b) Decrease rate of free face reverse PPV. (c) Free face direction PPV. (d) Decrease rate of free face direction PPV.
Table 4.
Experimental fragmentation size for inter-hole delay.
Fig 3.
Fragmentation statistics.
Fig 4.
Plot of Swebrec fitted distribution function.
Fig 5.
Peak particle velocity (PPV) and vibration reduction rate of different inter-row delay schemes.
(a) Free face reverse PPV. (b) Decrease rate of free face reverse PPV. (c) Free face direction PPV. (d) Decrease rate of free face direction PPV.
Fig 6.
Free face reverse principal frequency diagram.
Table 5.
Experimental fragmentation size for inter-row delay.
Fig 7.
Plot of Swebrec fitted distribution function.
Fig 8.
On-site bench blasting test site of the high-slope project.
Table 6.
Vibration reduction rate of the delay time optimization groups (tk = 38 ms, tp = 68 ms) relative to the original engineering groups (tk = tp = 13 ms).