摘要
分析了V型起爆技术在某露天铁矿深孔爆破开采中的应用。为了满足该露天铁矿对大块率、爆破震动等的要求,在该露天铁矿爆破参数的基础上,通过不断优化爆破参数,采用Kuznetsov平均矿岩块度预测数模和Rosin-Rammler矿岩块度分布数模,分析V型起爆技术对降低大块率的作用。经过理论计算,该露天铁矿爆破大块率在3.47%左右,且块度均匀性指标β在1.63左右,说明均匀性较好,根据萨道夫斯基爆破震动速度经验计算公式分析爆破震动临界条件,计算得到最大段单响药量不能超过650 kg。长期以来,该露天铁矿不断优化爆破参数,通过选用V型起爆技术,大块率明显下降,有效控制了爆破震动。
In order to explore the effect of V detonation technique on blasting boulder rate and blasting vibration in the Surface Iron Mine, the blasting parameters were adjusted and optimized. With the average rock fragmentation forecasting model （Kuznetsov） and rock fragmentation distribution model （Rosin-Rammler）, the V type blasting technology effect on reducing the block rate was discussed. With theoretical calculation,the blasting boulder rate was obtained as about 3.47% and the block uniformity index 1. 63 ,which showed that the uniformity was good enough. According to the critical condition of blasting vibration with Sa Rodolfo J-Ki experience formula, the biggest single charge was obtained as less than 650 kg. Combined with blasting parameters optimization and the V model detonation technique, the rock large rate and blasting vibration got reduced effectively.
出处
《爆破》
CSCD
北大核心
2015年第2期78-81,114,共5页
Blasting
关键词
K-R数学模型
爆破参数
V型起爆技术
爆破震动
爆破效果
K-R numerical simulation
blasting parameters
V-type initiation
blasting quake
blasting effect
