刘军,赫建明,孙占书,李卫平
LIU Jun 1,HE Jian ming 1,SUN Zhan shu 2,LI Wei Ping 2 (1 Beijing District,China University of Mining and Technology,Beijing 100083,China; 2 Xuanhua Iron and Steel Company,Xuanhua,Hebei 075200,China)

• 1:中国矿业大学北京校区!北京100083
• 2:中国矿业大学北京校区!北京100083
• 3:宣化钢铁公司!河北宣化075200
• 4:宣化钢铁公司!河北宣化075200

摘要(Abstract)：

利用统计分析方法 ,揭示破碎梯度n、平均块度K50 与不同性质岩石的爆破参数之间的内在联系。爆破试验在宣化钢铁公司近北庄铁矿露天采场进行。按普氏硬度系数的不同 ,把三个试验地点的岩石分为软岩、硬岩、坚硬岩石三类。只考虑抵抗线、台阶高与药量三个主要爆破参数对破碎块度的影响。用筛分法进行块度统计 ,并根据统计结果 ,画出破碎块度分布图。在试验设计和方差分析时 ,采用了Yates的方法 ,利用Yates表格分析了单一或组合爆破参数对破碎块度的影响以及对不同硬度岩石影响的显著程度
In this paper,the correlation of fragmentation gradient(n) and average fragment size(K 50 ) with blasting test parameters for different rock masses was revealed by a statistical and analytical method Blasting tests were conducted in Jinbeizhuang iron mine of Xuanhua Iron and Steel Company The rocks of three test sites were defined as soft,hard and very hard rocks according to Protodyakonov coefficient of rock strength The burden,bench height and charge weight were selected as blasting test parameters which affect the degree of fragmentation The screening method was used for analysis of fragmentation The fragment size distribution graphs were plotted based on analytical results The Yates method was applied for analysis of variance Through the Yates Table,the influences of single and combined blasting parameters on fragmentation of different rocks were analyzed and significant and non significant treatment combinations determined

关键词(KeyWords)： 台阶爆破;破碎梯度;块度分析;Yates法
Bench blasting; Fragmentation gradient; Fragment size analysis; Yates method

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 刘军,赫建明,孙占书,李卫平
LIU Jun 1,HE Jian ming 1,SUN Zhan shu 2,LI Wei Ping 2 (1 Beijing District,China University of Mining and Technology,Beijing 100083,China; 2 Xuanhua Iron and Steel Company,Xuanhua,Hebei 075200,China)

参考文献(References)：

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