An overview is given of two new developments in mine atmospheric monitoring._x000D_
A new personal dust monitor (PDM) that gives real-time respirable dust readings is discussed. The unit is mounted within the miner's cap lamp battery and internally measures the true particle mass of dust collected on its filter._x000D_
Samples are available for later mineralogical analysis and results do not exhibit the same sensitivity to water spray as optically-based measurement approaches. The technique achieves microgram-level mass resolution even in the hostile mine environment and reports dust loading data on a continuous basis._x000D_
The monitor has been evaluated under an Australian Coal Association Research Program (ACARP) grant and is being adopted for statutory mine respirable dust determinations in the United States (US). The monitor has particular application for determining location of high dust sources. It can evaluate the efficiency of engineering means of suppression and other approaches to reducing dust levels._x000D_
It has been recognised that the PDM's unique measurement approach has application to allow real-time atmospheric diesel particulate matter (DPM) monitoring. The industry has no real-time atmospheric DPM monitor at present._x000D_
Recent surveys in New South Wales and Queensland show significant numbers of miners continue to face full shift DPM exposures in excess of internationally accepted levels. Real-time DPM monitoring will allow the industry to pinpoint high exposure zones where a number of trucks and other vehicles work in areas of poor ventilation. Knowledge of high DPM concentration zones allows efficient modification of work practices to reduce underground miners' exposure._x000D_
Approaches to uses of the DPM form of the monitor and the design of tag boards are discussed. Some outcomes from mine tests with both these new instruments are given._x000D_
FORMAL CITATION:Gillies, A D S, Wu, H W and Harvey, T, 2008. Mine real-time personal respirable dust and diesel particulate matter monitoring, in Proceedings Tenth Underground Operators' Conference 2008, pp 239-248 (The Australasian Institute of Mining and Metallurgy: Melbourne).