Is it possible to combine the Dhuhr and Asr prayers within five minutes, even though there is an hour difference between them, due to the short break time at work and the entry of Maghrib prayer time at 4:00 PM?

Combining two prayers for a resident who is not ill and it is not raining is a matter of scholarly disagreement. However, it is permissible out of necessity, provided it is not made a habit. Therefore, if you find it difficult to perform Dhuhr or 'Asr prayers at their appointed times and you are in need of working, there is no harm in combining them. Nevertheless, strive to seek employment that allows you to perform prayers on time.