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Tunnel rock drill safety regulations video

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In this video, we show how rock drilling and bolting are carried out in a tunnel – one of the most important processes ensuring structural stability and work...

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Hard rock tunnel boring, cutting, drilling and blasting: rock parameters for excavatability Thuro, K. Plinninger, R.J. ETH Swiss Federal

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The drill & blast method is still the most typical method for medium to hard rock conditions. It can be applied to a wide range of rock conditions. Some of its features include versatile equipment,

Tunnel rock drill safety regulations video [PDF]

6 FAQs about [Tunnel rock drill safety regulations video]

What is the OSHA underground construction regulation?

The OSHA underground construction regulation (29 CFR 1926.800) applies to the construction of underground tunnels, shafts, chambers, and passageways. It also applies to cut-and-cover excavations connected to ongoing underground construction as well as those that create conditions characteristic of under-ground construction.

What should be done if a tunnel is collapsed?

Ground collapse (need we say more?) Work with Tunnel Foremen & Safety Supervisor to ensure adequate safety measures are taken. Should there be no initiation of explosives, minimum re-entry time must not be less than 30 mins. Blast inspection team shall enter tunnel with appropriate breathing apparatus. Non-explosives until being charged.

Does OSHA require illumination during tunneling operations?

As in all construction operations, OSHA requires that proper illu-mination be provided during tunneling operations (see 29 CFR 1926.56 for details). When explosives are handled, only acceptable portable lighting equipment may be used within 50 feet of any underground heading.

Are underground tunnels dangerous?

The construction of underground tunnels, shafts, chambers, and passageways are essential yet dangerous activities. Working under reduced light conditions, difficult or limited access and egress, with the potential for exposure to air contaminants and the hazards of fire and explosion, underground construction workers face many dangers.

What is the minimum illumination intensity for tunneling?

For general tunneling operations, a minimum illumination intensity of 5 foot-candles must be maintained, although 10 foot-candles must be provided for shaft heading during drilling, mucking, and scaling. The employer must assign a “competent person” to perform air monitoring.

What are the safety requirements for parked rail equipment?

Parked rail equipment shall be chocked, blocked, or have brakes set to prevent inadvertent movement. Berms, bumper blocks, safety hooks, or equivalent means shall be provided to prevent overtravel and overturning of haulage equipment at dumping locations. Bumper blocks or equivalent stopping devices shall be provided at all track dead ends.

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