That makes no sense to me. How the heck can you control explosives without making the problem worse?
If capping/siphoning doesn't work they will try new wells to relieve the pressure elsewhere. Unfortunately, that option will take months to implement.
For one thing, an explosion at the wellhead would be “tamped” by a mile of seawater. That means all of the explosive force would be applied to the sea bed itself. They would have to ensure that a blast doesn’t just fracture the leak area and cause a bigger leak; it would have to be a decisive explosion. I know that many are saying a nuke would be a terrible idea, but it would in fact melt the silt and sand in the area of the leak into glass and compact the sea bed to the point that a continuing leak is unlikely. Any residual radioactive “fallout” would be heavy and would join the silt on the bottom, a mile underwater. I can’t imagine it would have any worse environmental effects than to let this gusher go on.
At least two relief wells are in process as we speak. It’s not an instant procedure, so those should be online sometime in July.