Abstract
Explosives have shared a large part for development and maintenance of our society. The works that consumed explosives for destroying rocks and constructions are called blasting. Main purpose of the traditional way of blasting is that blasting works get the most out of energy of explosives and burst a large amount rocks efficiently. However, the environment around blasting work sites changes with the times, and the phenomena like vibration, noise, fly rocks and falling by blasting operations became objects of public concern. So, main purpose of blasting became eco-friendly such as controlled blasting and release blasting. Theses blasting methods are not analyzed sufficiently yet. If the chemical energy of explosives becomes to be controlled freely by us, control methods will promote more effective use of explosives, and will develop bigger market of blasting. In this paper, control blasting has been discussed from points of view of using different kinds of explosives and different charge methods, and good results obtained by the field test are described.
社会整備に火薬類が果たした役割は大きく，遂行する為の作業を発破と言っている。採掘発破では，火薬類のエネルギーを最大限に生かす事を主眼として大量の岩石を効率的に破砕することを目的としていた。しかし，時代と共に火薬消費現場の環境が変わり，発破作業に伴う振動・飛石・崩落と言った現象が社会問題化するに至り，制御発破・ゆるめ発破など人・環境に優しい発破が主流になってきている。これらは工学的な解析が十分になされていないのが現状である。筆者は，火薬類の化学反応エネルギーを自由自在に制御出来れば，エネルギーや資源の有効活用になり発破の使用分野拡大にもつながる大きな課題と考えている。本研究では，発破による岩石の破断方法について火薬類の種類，装薬方法等から検討し，現地適用実験から良好な結果を得たので報告する。
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