A 40-year-old man from Aspley, in Brisbane's north, on Wednesday faced the Brisbane Magistrates Court on one charge of fraud.
He has denied being a terrorist and has told a court that a stockpile of explosives found at his home were for use in a television production.
About 30 houses in Aspley were evacuated after police allegedly found 53kg of explosives, some manufactured into bombs with nails and razor blades embedded in them, at the man’s home on Tuesday night.
Police also evacuated and searched a state high school in Brisbane's north-west, where the man teaches.
An emergency situation was declared but lifted at 1.40pm (AEST) on Wednesday.
Police haven't ruled out whether the bombs were intended for a terrorist attack.
They say they're still profiling the man and examining the nature of the devices.
Neighbours say they grew suspicious of the man when they allege they saw him carry large plastic barrels in his car.
The man's been charged with fraudulently obtaining 53 kilograms of an explosive device known as powergel.
They say about a fifth of it had been converted into bombs.
The suspect told the court he had no affiliation to any violent terrorist organisation and had a high-level security clearance.
"Your honour, prior to the current charges I've worked for three years in public relations at the (Brisbane) airport and have a red
ASIO security clearance," the man told Magistrate Lindy Bradford-Morgan.
"I don't have any affiliation to any violent organisation. The explosives are being used in a TV shoot.
"I've also cooperated with the police and helped them locate everything because I don't want any danger to them or the public."
The court hearing was adjourned to allow the suspect to seek legal advice.
Police are planning to strenuously oppose any bail application.