The Courier-Journal reports the Kentucky surface coal mine where two workers were killed by falling rock on Friday was cited earlier this year over the stability of a highwall.
The two workers were employed by a blasting crew and they were trapped in or near their truck by falling rock and earth. Several other miners at the site were injured by falling rock and debris. Armstrong, which began mining operations at Equality Boot in the fall of 2010, utilizes two draglines and the truck-and-shovel mining methods. The mine has been closed pending an investigation.
The Courier Journal reports the US Mine Health and Safety Administration cited operator Armstrong in April over removal of loose hazardous material from the top of highwalls, the unexcavated face of the layers of soil and dirt and rock lying on top of the coal seam. Records show Armstrong has contested the citation.