130 supports were damaged; the longwall idled for two shifts; one miner was injured
First weighting
Apri 3, 1995, at 9:13 PM
1.9
Headgate of 1407 panel
Blasting
50 m of rib was damaged; 8 supports were broken
Periodic weighting
Apri 3, 1996, at 8:42 AM
2.9
Tailgate of 1407 panel
Blasting
100 m of the tailgate was damaged; the longwall was idled for 3 days; 10 miners were severely injured; one miner was slightly injured
Abutment load on tailgate pillar and massive conglomerate strata movement
Jun 17, 1996, at 3:40 AM
2
Face of 2407 panel
Blasting
10 m of rib was damaged; 10 supports were twisted or broken; floor hove 300 mm
Massive conglomerate strata movement, tectonic stress and abutment load on tailgate pillar
Jun 28, 1996, at 8:46 AM
1.7
2407 tailgate
Blasting
5 m of rib was damaged
Abutment load on tailgate pillar
May 10, 2000
1.6
Upper corner of face of 3406 panel
Blasting
1 miner was severely injured; 12 props were distorted; roof fell
Abutment load on tailgate pillar
Jul 5, 2001
1.7
Face of 3407 panel advanced 83 m
Blasting
1 miner was killed; 13 were injured; gateroad was closed completely; 53 props were broken
Stress concentration resulting from strata movement
Jun 29, 2002
2.9
Face of 1409 panel advanced 197 m
Coal cutting
Floor hove within crosscut to the tailgate entry
Gate pillar instabilities and conglomerate strata movement
Aug 16, 2006
2
Development face of 1410 tailgate
Coal cutting
30 m of the tailgate was seriously deformed with roof sagging up to 1.5 m; header and stage loader were raised 0.5 m; tail of belt conveyor was twisted; stage loader was off the rail
Side abutment load
Sep 9, 2006
2
Working heading of the tailgate of 1410 panel
Coal cutting
71 m of the tailgate was destroyed with 1.4–2.5 m roof-to-floor convergence and 1.0–2.3 m rib-to-rib convergence; two miners were killed; two were severely injured; energy released was J
Conglomerate strata movement caused stress concentration on pillar and surrounding rock mass; fault