MSHA record for Road Fork Mine #7 (1) (mine ID 4608393). Fatalities, non-fatal incidents grouped by year, current operator and controller, and mine context.
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FAILURE OF ROOF STRATA- 10' OF UNSTABLE ROCK BETWEEN THE NO 4 & 5 SEAM. BELTED WITH 7' POINT ANCHOR BOLTS AND SUPERBOLTS IN INTERSECTION ANCHORED IN SANDSTONE ABOVE THE NO 5 SEAM WITH A CRIB I N INTERSECTION.
SOME TIME BETWEEN 12-23-95 AND 12-30-95 MINE WAS IDLE BETWEEN THESE DATES. FAILURE OF ROOF STRATE AT + LEAVE THE ANCHORGE. THESE FALLS ARE OCCURING WHERE LEALTY OLD PLAN HAD BEEN USED.
FAILURE OF ROOF STRATA AT AND ABOVE THE ANCHORAGE HORIZON. NEW ROOF PLAN IS IN AFFECT IN AREAS INBY THE FALL.
THERE IS A 8' TO 10' OF ROCK THAT IS MIXED IWTH COAL & SALT ROCK BETWEEN TEH POCA 4 & 5 SEAM. THE ROCK IS TO SOFT TO FORM.
ROCK IS SOFT--WE ARE HAVING A TOUGH TIME FORMING A BEAM. WE ARE USING 7'TAB NUT REED BAR WITH 2'PINNER SETTING RESIN.
WE ARE STILL LOOKING INTO WHAT MADE TOP FALL. WE BELEIVE AT THIS TIME IT WAS A NODETECTABLE SLIP. WE ARE USING A 7' TENSION BOLT AT THE MINE AND THEY SEEM TO BE DOING A GOOD JOB EXCEPT IN THIS INSTANCE.