Environmental impact of drill and blast tunnelling: life cycle assessment

摘要: Abstract This paper explores the environmental impacts of drill and blast tunnelling by life cycle assessment. In order to understand potential cleaner tunnelling, this also analysis influence tunnel length size on pollutant emissions. The excavation practices rock in Norway over past 20 years are used estimate material, equipment energy consumption. background data drawn out from various databases Simapro software. results indicate that: 1) most important contributor climate change terrestrial eco-toxicity loading hauling process. Its relative contribution increases when becomes bigger or longer. 2) drilling blasting process is dominate human toxicity, photochemical oxidant formation, particulate matter formation acidification impacts. process, however, slightly decreases tunnels become 3) three main sources for all explosives, diesel electricity. Therefore, a significant reduction could be reached optimising operation reduce explosive consumption, improving renewable sharing.