Dynamic photoelastic research and engineering application of chamber blasting at different cavity ratios
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摘要: 為了分析不同空腔條形藥包爆破效果,以動光彈為研究手段,用五種不同空腔比實驗模型進行了爆破動應力場及破壞結果研究,并在首鋼128t硐室大爆破中進行了工程應用.研究和應用結果表明:最佳空腔比約為4.0;在巖石特別破碎地區為控制飛石,可采用大空腔比進行爆破設計理論.Abstract: In order to analyze the blasting effect of linear charge at different cavity ratios, the changes of stress field and the destroyed effect at five cavity ratios were investigated by dynamic photoelasticity in experimental models. These were applied to 128 t chamber blasting in Shougang Mine in China. The results indicated that the cavity ratio above 4.0 was suitable. And a bigger cavity ratio in a broken stone area was designed for controlling fly rock.
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Key words:
- chamber blasting /
- cavity ratio /
- blasting effect /
- linear charge /
- dynamic photoelasticity
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