| 抛掷爆破岩体抛掷距离影响因素研究 |
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| 作者单位： | ;1.中国矿业大学煤炭资源与安全开采国家重点实验室 |
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| 摘 要： | 有效抛掷率是评价抛掷爆破岩体效果的重要指标。依据质点运动弹道学原理,推导出抛掷距离与炮孔倾角及炸药单耗的关系式,描述了各参数之间关系变化的趋势,并通过对黑岱沟露天煤矿抛掷爆破参数的分析,给出合适的炮孔倾角及采用铵油炸药时的炸药单耗范围,这对于指导露天煤矿抛掷爆破的设计具有一定实际意义。
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| 关 键 词： | 抛掷爆破 抛掷距离 炮孔倾角 炸药单耗 |
STUDY ON THE INFLUENCING FACTORS ON CASTING DISTANCE OF ROCK BY CASTING BLAST |
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| Abstract: | Effective casting rate is an important index to evaluate the effect of casting blast.Based on the ballistics principle of particle motion,the relation formulas between casting distance with blast-hole inclination and unit explosive consumption were deduced,and the variation relationships of them were described.Though analyzing the casting blast parameters of the Heidaigou surface coal mine,the reasonable inclination of blast-hole and the range of unit explosive consumption when using ammonium nitrate fuel oil explosive were given.It had certain practical significance for guiding the design of casting blast in surface coal mine. |
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| Keywords: | Casting blast Casting distance Blast-hole inclination Unit explosive consumption |
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