Well-known hypothetical nuclear explosion evasion scenarios include cavity decoupling and placing nuclear tests within routine ripple-fired mine explosions. We consider a different scenario: using repeat shots - explosions conducted in the damage (fracture) zone created by an earlier explosion(s), which may considerably reduce the amplitudes of the subsequent explosions due to a fracture decoupling. We are going to conduct a unique experiment to quantify the effects of fractures on chemical explosion decoupling. We will conduct a series of explosions up to 511 lbs in order to extensively fracture granitic emplacement media. Seismic signals from the explosions will be recorded on local stations as well as permanent stations. We will then re-drill the same blast holes, use borehole cameras to estimate fracture densities, and then reload the holes for a second equivalent yield shot.
Notes
Start date: 10/18/11 End date: 10/27/11 Data to be restricted until 10/27/13
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