11/15/2018 Rock Dust Partnership Action Items

Large-scale testing at Central Mining Institute

• Conduct layered dust testing – 1st Qtr. 2019
• Report detailing results to be delivered to Partnership – 3rd Qtr. 2019

Treated rock dust

• Partnership involvement to identify deployment sites
• Conduct deployment study(s) – 3rd Qtr. 2019

Foamed rock dust

• Improve application methodologies
• Develop protocol to assess foamed rock dust at CMI
• Protocol delivered to Partnership – 3rd Qtr. 2019

Rock dust dispersibility

• Meet with appropriate NIOSH committee and discuss requirements to develop standardized method for assessing rock dust dispersibility in underground coal mines – 2nd Qtr. 2019