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Rock-breaking mechanism and experimental analysis of confined blasting of borehole surrounding rock 被引量:12
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作者 Liu Changyou Yang Jingxuan Yu Bin 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2017年第5期795-801,共7页
The rock-breaking mechanism and effect of confined blasting were analysed by blasting and impact dynamic mechanics, fluid dynamic mechanics, fracture mechanics as well as blasting experiment. The results showed that t... The rock-breaking mechanism and effect of confined blasting were analysed by blasting and impact dynamic mechanics, fluid dynamic mechanics, fracture mechanics as well as blasting experiment. The results showed that the fracturing of surrounding rock in confined blasting condition is the result of coaction of rock pre-cracking by shock wave and stress wave and the continuing expanding crackenhancement of confined medium, and the model of crack development of borehole surrounding rock in confined blasting condition was established. This study acquired the damage range of surrounding rock under the action of shock wave and stress wave, as well as the crack development characteristics of surrounding rock after the wedge-in confined medium into the crack space. Deep-hole confined blasting experiment on large rock showed that the high-efficient utilisation of in-hole explosive was achieved and the safety of rock blasting operation was ensured. Safe static rock-breaking under the action of high-efficient explosive blasting was achieved as well as the unification of super dynamic load of explosive blasting and static rock-breaking of water medium. 展开更多
关键词 shock wave confinED medium Water-wedge action Crack development confinED BLASTING
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约束层刚性对激光诱导冲击波影响的研究 被引量:18
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作者 周建忠 杨继昌 +3 位作者 周明 张永康 郭大浩 吴鸿兴 《中国激光》 EI CAS CSCD 北大核心 2002年第11期1041-1044,共4页
用不同的实验方法研究了约束层的厚度和弹性与激光冲击强化效果和变形量的关系,进而说明约束层本身的刚性对激光诱导冲击波的影响。实验表明,采用一定厚度的约束层,既能有效利用激光能量,又能获得较大的激光冲击波峰压;一定刚性的约束... 用不同的实验方法研究了约束层的厚度和弹性与激光冲击强化效果和变形量的关系,进而说明约束层本身的刚性对激光诱导冲击波的影响。实验表明,采用一定厚度的约束层,既能有效利用激光能量,又能获得较大的激光冲击波峰压;一定刚性的约束层比弹性约束层更能有效提高激光冲击波的峰压,从而能得到更好的激光冲击效果。 展开更多
关键词 激光诱导冲击波 约束层 刚性 峰压 冲击效果
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激光冲击强化约束层选择的研究 被引量:7
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作者 肖爱民 杨继昌 张永康 《应用激光》 CSCD 北大核心 2001年第1期16-17,15,共3页
对激光冲击强化处理中约束层的使用与选择进行探讨。实验表明约束层中含有的羟基是导致激光能量急剧损耗的主要原因,提高约束层的密度可以有效地提高冲击波峰压。
关键词 金属材料 激光冲击处理 约束层 冲击波峰压
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