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Abstract With the artificial neural networks(ANN) model，the paper analyzes the influence of the blasting parameters including explosive charge，blastholes on tunnel circulation measurement. The analytical results are advisable and as follows：(1) The concepts of tunnel circulation measurement of one-kilogram explosive and tunnel circulation measurement of one-meter length of blasthole are put forward. They provide a certain standard for the judgment whether a tunnel blast design is acceptable or unacceptable. (2) When there are enough blastholes，circulation measurement of one-kilogram explosive decrease when circulation charge increases till to a steady value. That is to say some explosives will be wasted if too much is used in a cycle. (3) Circulation measurement of one-kilogram explosive rises with the increases of circulation length of blastholes when circulation charge keeps to the same，but the enhance extent relatively becomes small with circulation charge increases. (4) When the circulation explosive charge is enough，circulation measurement of one-meter length of blasthole decreases with circulation length of blastholes increasing till to a steady value. (5) Circulation measurement of one-meter blasthole goes up with the increases of circulation explosive charge when circulation length of blastholes keeps the same，but the enhancement extent relatively becomes small with the increase of circulation blasthole length.
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Received: 19 April 2007
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