Page 65 - Safety and health in construction

Excavations, shafts, earthworks, underground works and tunnels

9.5. Transport, storage and handling of explosives

9.5.1. The transport, storage and handling of explosives should comply with the
requirements of national laws and regulations.

9.5.2. Explosives should not be conveyed in a shaft cage or bucket together with
other materials.

9.5.3. Explosives and detonators should not be conveyed together in a shaft
unless they are in a suitable powder car.

9.6. Blasting

9.6.1. The modes of blasting should be in accordance with national laws or
regulations.

9.6.2. No other electrical circuit should be installed on the same side of the
tunnel as the blasting circuit.

9.6.3. Before any shot is fired, all electrical circuits other than the blasting
circuit should be de-energised within an adequate distance from the firing point.

9.6.4. Only suitable battery lamps should be used during loading shotholes.

9.6.5. After every blast, the sides, workface and roof should be inspected and
cleared of loose rock.

9.7. Haulage

9.7.1. The haulage system should comply with the national laws and regulations.

9.7.2. In tunnels where there are rail tracks, unless there is adequate clearance
between the rolling stock and the sides, recesses should be provided at suitable intervals
which should be large enough to accommodate two persons and should be at least 60
cm deep.

9.7.3. Mechanical haulage operations should be controlled by suitable signals.

9.7.4. Trains and single cars should have headlights and tail-lights.

9.7.5. Rerailing by hauling with a winch should only be done under the control
and supervision of a competent person.

9.7.6. Workers should not be transported on locomotives or in cars other than
those specially provided for that purpose.

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