Dust Sampling in Mines

Airborne dust in coal mines: the sampling problem.

How does limestone rock dust prevent coal dust explosions in coal mines?

Coal dust explosions in underground coal mines are pre­ vented by a generous application of rock dust (usually lime­ stone). If an explosion should occur, the rock dust disperses, mixes with the coal dust and prevents fl ame propagation by acting as a thermal inhibitor or heat sink. To investigate this process in more detail, a number of ex­ plosion experiments using various coal dust and limes...

Dust sampling and lung disease.

No instrument for sampling airborne dust or mist collects a sample which is truly representative of all the particles present. There are errors associated with the random variation of the cloud in time and position and instrumental errors due to the act of sucking the cloud into the sampling apparatus or to inherent failings of the dustseparating or measuring mechanism which cannot be entirely ...

Dust Sampling in Mines a Review of Some Methods of Sampling, Examining and Analysing Mine Dusts. Comparison of Results Obtained and Criteria for the Estimation of Airborne Dust Levels with a View to Determining Maximum Admissible Concentrations

Dust sampling to simulate the human lung.

There are many difficulties associated with sampling an air-borne dust and with assessing its concentration, especially when the potential danger to the lungs is being considered. This is evident from the fact that such a large number of different dust-sampling instruments have been devised from time to time, no two of which give the same results under all conditions. This multiplicity of instr...