Heusden-Zolder colliery


The Heusden-Zolder mine was the last in the Benelux to close. These days the ZLDR Luchtfabriek (air factory) and the market square are the hubs of the site.

Making air

Have you ever asked yourself how miners were able to breathe underground? That’s what the air factory was for: pushing sufficient oxygen in all the passages. Via an interactive walking route past the impressive original installations, you will learn how the coal was brought up, among other things,