and Nazzaro, A.: 2002, Anomalous crustal movements with low seismic efficiency
- Campi Flegrei, Italy and some examples in Japan.
In an MS event, the ratio of seismic energy ([DELTA][bar.U]) to the total energy release ([DELTA]U) during the microfracturing of the rock mass can be defined as the seismic efficiency [eta], that is,
The seismic efficiency at the right bank slope of the Dagangshan hydropower station can be obtained by comparing the seismic wave energy with the total energy released by explosive charges during the blasting tests.
Using the school building G in Figure 3 as an example, the definitions of seismic efficiency (SE), economic efficiency (EE) and planning efficiency (PE) are shown in Eqns (3) to (5).
Eqn (3) can be utilized to evaluate the seismic efficiency of school buildings not on the efficient frontier; Eqn (4) can be adopted to evaluate the economic efficiency; and Eqn (5) can be used to evaluate the planning efficiency of school buildings in terms of seismic resistance and cost effectiveness.
On October 10th 2011, DRB was undertaken with an extremely high seismic efficiency
, which resulted in rockburst; the mine was so damaged that advance of the working face front had to cease for about five weeks.