Transcription of Construction safety in hard rock tunnelling (Handout) - …
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Construction safety in hard rock tunnelling (Handout) - …
Construction safety in hard rockTunnellingDr Zhou YingxinProgramme Manager (Underground Technology & Rock Engineering)Defence Science & Technology AgencyMethod of Construction Drill and Blast Method Method of rock cavern excavation with the use ofexplosives. Most suitable for hard rock with complex layoutand geometry Unique hazards due to need for blasting Work is carried out in a cyclic mannerDrillingChargingBlastingVentilatio nMucking outShotcreteRockboltSurveyThe Tunnel CycleScalingFactors Unique to tunnelling Uncertainty in the nature and variability of groundconditions (rock quality, ground water, gas, etc) -need for adequate site investigations prior to andvigilance during tunnelling Confined space of tunnel environment (limitedaccess, escape, air quality control) Difficulty in communications (sound and signalbarriers)
Construction Safety in Hard rock Tunnelling Dr Zhou Yingxin Programme Manager (Underground Technology & Rock Engineering) Defence Science & Technology Agency
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