Explosive aerosols sedimentation processes with modern coal mining technologies

Experimental studies are considered of air dust levels and the intensity of dust sedimentation at the extraction site openings which are ventilated according to the schemes with directing the outlet stream into the conveyor gallery according to paragraph 135 of the current safety regulations. Method of dust concentration dynamics along the opening length simultaneous studies with measurements of dust deposits mass and sedimentation intensity dynamics along the 50 meter of the roadway, adjacent to the longwall face is applied. In the course of measurements, the arrangement of the plates was varied. Data on the deposited dust mass were obtained: along both walls of the opening; with several plates located in the "one point" of measurement; on change of the total mass of deposited dust at different sections along the conveyor gallery with the outlet air stream. Significant differences are disclosed in the intensity of dust sedimentation at different points of 50-meter long opening sections containing internal sources of dust emission. The aim of the work is to improve the existing methods and to create new ones for on-going control of dust sedimentation with the aim to determine explosive conditions of mine workings and to establish the frequency of work to neutralize the explosive properties of coal dust.