ABSTRACT
In tunnel construction work, dust is generated at almost all activities from rock blasting, rock drilling, rock bolting, transport operations and spraying wet concrete on tunnel walls. Each of these activities had the potential to expose workers to airborne contaminants that, if not adequately controlled, can lead to significant harm, such as lung dysfunction. Therefore, it is essential to monitor dust concentration in the air during tunnel construction work to minimize health damage caused by dust. The Digital Dust Indicator and the Low Volume Sampler are famous devices for the dust concentration monitoring in tunnel construction. However, their common weak point is that they lack instantly because they require post-measurement work to know dust concentration readings. “Low cost”, “portable” and “real-time” are the keywords for sophistication of air dust monitoring devices for tunnel construction.
