The explosives in the diamond mine are just to the left of the elevator. Turn off the elevator switch that's sparking, then push the explosives to the right. You turn the sparking switch back on to detonate it. You do this twice: once for the big rock and once for the wall at the far right.
To use the explosives:
In the Diamond Mine, there are explosives at the left. (see related question)
Slide them from the left of the elevator. Be sure to turn off the sparking switch before you do, because that's how you set them off.
The explosives in the Diamond Mine are left of the elevator, as many as you need. You detonate it with the sparking switch (turn it off before moving exlosives).
The only explosives are at the Diamond Mines. But you don't punch them: you use the switch (which makes sparks)to set off the barrel when it is in position.
Inside the Diamond Mine on Nabooti Island, you must get through a rock wall. There are barrels of explosives to the left side of the elevator. To set them off, you use the shorted, sparking wire from the elevator control. Turn the elevator off, push a barrel across the floor, and then turn the elevator back on, igniting the trail of leaking explosives. You will need to blast twice : once for the rock in your way and once for the wall itself, at far right.
Nabooti is an island on Poptropica.
The three traders are all at Nabooti, where you first arrive on the island.
In the Diamond Mine, the explosives to blast the rock wall are to the left of the elevator. Turn off the elevator switch (the sparking wire) and slide a barrel to the rock, then explode it by turning the switch back on. Repeat for the wall.
In the Diamond Mine, the explosives to blast the rock wall are to the left of the elevator. (There are as many as you need.) Turn off the elevator switch (the sparking wire) and slide a barrel to the rock, then explode it by turning the switch back on. Repeat for the wall.
it leaves nabooti island
The time device is part of Time Tangled Island, not Nabooti Island.
Nabooti Island is on the Island Map, which is reached from any Main Street via the blimp.