Effect of the Size and Position of a Damping Ditch on the Reduction of the Blasting Vibration

Table 1

Domestic and foreign scholars have conducted research on damping ditches for vibration reduction.

The characteristic of the damping ditches	Research results of scholars
Different types of damping ditches	Persson et al. [4] and Ekanayake et al. [19] found that an increase in the depth of the filled groove significantly improved the damping performance; Zoccali et al. [3] considered that a longer damping ditch provided a better damping effect; Saikia and Das [5], Wang et al. [1], Yu et al. [2], Saikia et al. [5, 6], and Thompson et al. [10] found that the damping ditch width had almost no effect on vibration damping.
Different shapes	Thompson et al. [10] and Hamdan et al. [11] found that the effect of the rectangular damping ditch was excellent and convenient for on-site applications; Esmaeili et al. [7] showed that the vibration damping effect was better for a V-shaped damping ditch than for an ordinary rectangular damping ditch; Zakeri et al. [8] was determined that the step-type damping ditch had a better damping effect than the ordinary rectangular damping ditch; Jesmani et al. [9] showed that the larger the radius of the arc of the damping ditch, the wider the protection range; in addition, an increase in the angle increased the rate of decrease in the vibration amplitude.
The damping effect of paired damping ditches	Van Hoorickx et al. [12] and Younesian and Sadri [13] found that the damping performance was significantly better for the paired damping ditch system than the single damping ditch; the distance between the paired ditches had a significant effect on the damping performance.
In terms of filled damping grooves	Jayawardana et al. [21] determined that the open damping ditch and water-filled damping ditch exhibited better performance than other types of damping ditches; Ulgen and Toygar [18] determined that the geofoam-filled trench had the best vibration damping performance; Ju et al. [14] and Barbosa et al. [15] found that the water-filled groove had low damping efficiency in the Y-direction of the wave; Alzawi and Naggar [20] found that the damping performance was lower for the open damping ditch than the filled ditch when the distance between the damping ditch and the vibration source was short.