DRILL & BLAST
Scale or fail? ‘F
alls of ground underground continue to feature in most sets of underground mining safety statistics. Te term suggests, often wrongly, a major collapse of roof or sides but falls of individual but heavy, loose boulder or cobbles from a hanging position can equally cause death or major injury to anyone in the vicinity.
Scaling involves the removal of dangerous, hanging rocks before they fall due to some unplanned action. Much depends on the type and condition of the rock being worked. As examples sandstone beds can produce large blocks from the roof, whereas shaley ground is often more friable with the possibility of large falls of much smaller but also hazardous lumps.
Scaling involves the removal of dangerous, hanging rocks before they fall due to some unplanned action. Maurice Jones reports
Skalierung beinhaltet die Entfernung der gefährlichen, hängen Felsen, bevor sie bis zu einem gewissen ungeplante Aktion fällig
Escalado consiste en la eliminación de peligrosos, rocas colgando antes de que caigan debido a algún tipo de acción no planificada
The Thiessen Team of the US and Canada, including BTI Rockbreaking Systems, offer a vibratory pick scaling (VPS) head mounted on a telescopic boom, and a hammer feed scaler (HFS)
05 INTERNATIONAL MINING ENGINEER
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