Here's two methods for using explosives to create energy. The method on the left involves blasting water in a large water cannon up into the loop, and using pressure to spin the turbine at the bottom. The method on the right involves pre cutting the earth above an underground explosion that lifts the monolithic piece out of the ground into the sky and lands nearby. The piece of land can then spin a turbine lowering the weight back into the crater it created, or the crater can be used for whatever purpose. My experiments with fireworks showed the water cannon to be 8-20% efficient with weight alone, and the pre-cutting to be 4-8% efficient.