Village defences

I need to place defences around the city for a thought of intruders. I have a jutsu that will work myself for land and water and a small amount of even the air. It consists of concentrating chakra into my hand and placeing my hand on the earth or water and creating a sensor mine which explodes upon reaching within 5 foot of the village. I assure you they will only explode on the opposing villages not anyone from our village. I have enough chakra to detonate the most of our land and i want to know if anyone objects to this idea.