This absolutely works and is a time saver. BUT, after having removed all the attachments to the ground to isolate the suspended copper ore (which may include parts of the copper ore itself), you have to then break a piece of the suspended mass and the whole thing will explode to the ground. Sometimes you may have to break more than one piece and, sometimes, the suspended ore chunk is bugged and won't explode as you wish.

There has to be some videos of players demonstrating this technique successfully. Look them up.