Roof Bolts Definition

Anchor points are usually installed on the roof and are used to connect lanyards lifelines and other forms of tie off which prevent a worker from falling.

Roof bolts definition.

Rüf bōlt mining engineering one of the long steel bolts driven into walls or roofs of underground excavations to strengthen the pinning of rock strata. They also drill bolt holes into roofs at specified distances from ribs or adjacent bolts. Want to thank tfd for its existence. Mcgraw hill dictionary of scientific technical terms 6e copyright 2003 by the mcgraw hill companies inc.

A long steel bolt inserted into walls or roof of underground excavations to strengthen the pinning of rock strata. Purlins are supported either by rafters or the walls of the building. Rock bolts were first used in mining in the 1890s with systematic use documented at the st joseph lead mine in the u s. Roof anchors can be as simple as a d ring connection or as complex as a complete lifeline system.

A rock bolt is a long anchor bolt for stabilizing rock excavations which may be used in tunnels or rock cuts it transfers load from the unstable exterior to the confined and much stronger interior of the rock mass. It is inserted in a drilled hole and anchored by means of a mechanical expansion shell that grips the surrounding rock at about 4 ft 1 m spacing and pins steel beams to the roof. Roof bolts promised to dramatically reduce the number of roof fall accidents which then claimed hundreds of lives each year and they were initially hailed as one of the great social advances of our time roof bolting also emerged at a time of rapid technologic. Rock bolt reinforcement can be used in any excavation geometry is simple and quick to apply and is relatively.

Rock bolt in tunneling and underground mining steel rod inserted in a hole drilled into the roof or walls of a rock formation to provide support to the roof or sides of the cavity. Roof bolts are inherently more effective than the wood timbers they replaced. Anchor points are a vital part of a fall protection system.