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30Aug91 UK: REPORT ON THE A82 IMPROVEMENTS TAKING PLACE ON THE BANKS OF LOCH LOMOND IN SCOTLAND. (2 OF 2)

Often the rock will come out oversize if a fracture plane opens up and the expanding gas, which is used to cause the explosion, escapes. If that happens then there's a lot of secondary work to be done to break down the rock.'The obvious solution would be to beef up the explosion force of the charge, but this was often not possible for two reasons. First, there was the possible effects of the vibrations on nearby houses and second the increased danger of small pieces of rock flying through ...

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