ANFO is the most useful industrial explosive in mining and quarries.The main reasons are its
lower cost and easier mixing compared with other explosives. Furthermore, ANFO has good characteristics in
handling such that it can be filled in some bags and flexible contaainers containing
and be suited for bulk loading with pneumatic loading equipment.
Recently, several field - blasting tests of high - performance ANFO〔ANFO(H)〕have been carried out.
ANFO(H) has the improved detonation properties and the rather low bulk density compared with
conventional ANFO. the results of these field - blasting tests showed that ANFO(H) cuold make the
specific charge decrease without affecting the fragmentation, the displacement of the blasted rock and
the breakage in the toe. Furthermore, the field - blasting tests of more improved high - performance
ANFO〔ANFO(SH)〕have been conducted. The results indicated that ANFO(SH) wuold be available for field use.
従来のANFO爆薬(ANFOと略す)に比べて低比重, 且つ高威力化が図られた高性能ANFOの実用性について, 採石場での実規模試験発破により検証を行った｡ 装薬長を含め発破パターンを従来のANFO使用時と同一条件とし, 従来品との比較評価を行った結果, 爆薬原料単位の低減にも拘わらず,十分な起砕効果を示した｡ また, 従来のANFOと同様, 取扱性に優れ, 固結性に関しても特に問題は見られなかった。