Abstract
A laboratory apparatus (shield dust simulator) was designed and constructed to simulate the dust generated during the advance of longwall hydraulic roof supports, or shields. The objective of the study was to develop a tool that could be used to test the hypothesis that foam applied to a mine roof prior to a shield advance could be used to reduce the respirable dust generated during shield advances. This paper will outline the design parameters for the development of the system, as well as describe baseline testing of coal and limestone dust. Results show that the average instantaneous respirable dust concentrated during simulated shield advance. Confidence intervals were calculated from the instantaneous respirable dust data to determine the repeatability of the data produced by the device.
Highlights
During longwall mining, miners can be exposed to respirable dust that is generated during the advance of hydraulic roof supports or shields
The respirable dust generated during the advance of the shields can be a Disclaimer The findings and conclusions in this report are those of the author(s) and do not necessarily represent the official position of the National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention
A laboratory apparatus was designed that could simulate dust that is generated during longwall shield advances
Summary
Miners can be exposed to respirable dust that is generated during the advance of hydraulic roof supports or shields. The respirable dust generated during the advance of the shields can be a Disclaimer The findings and conclusions in this report are those of the author(s) and do not necessarily represent the official position of the National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention. CDC NIOSH, Pittsburgh, PA 15236, USA significant contributor to the respirable dust exposure of the mining personnel operating at the longwall face, especially since some of the dust are generated in the walkway (Srikanth et al 1995). Control systems designed to reduce the dust content levels generated during the shield advance have the potential to greatly reduce the respirable dust exposures of the personnel at downwind of mining activities (Chekan et al 2010)
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