摘要
以内蒙古某金矿急倾斜薄矿脉中深孔开采为工程背景,采用经验类比、数值计算和现场试验等手段开展研究.分析了不同爆破参数下薄矿脉中深孔爆破围岩裂纹演化规律,得到了爆破孔网参数与爆破超欠挖百分比、爆破裂纹密度及围岩质点振动速度等指标之间的关系.结果表明:当孔间距为1.2~1.4 m时,爆破超欠挖面积趋于零;当抵抗线为0.8~1.0 m时,爆破块度较均匀;最优中深孔爆破参数为抵抗线1.0 m,孔间距1.2 m.现场中深孔爆破试验验证了本文的研究结果.
Taking the medium deep hole mining in steeply narrow vein of a gold mine in Inner Mongolia as the engineering background,through empirical analogies,numerical simulation and field tests methods,the evolution law of cracks in narrow veins of deep hole blasting under different blasting parameters was analyzed,and the relationship between the blasting parameters and the over-under-excavation percentage of blasting,the density of blasting cracks and the vibration velocity of the surrounding rock particles is obtained.The results show that:when the hole spacing is 1.2~1.4 m,the over-under-excavation blasting area tends to be zero.When the burdern is 0.8~1.0 m,the blasting fragmentation is more uniform.A burden of 1.0 m and a hole spacing of 1.2 m can be taken as optimal parameters during deep hole blasting.The field blasting test also verifies the research results of this paper.
作者
安龙
张家华
李元辉
韩琳
AN Long;ZHANG Jia-hua;LI Yuan-hui;HAN Lin(Key Laboratory of Ministry of Education for Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110819,China;Shandong Gold Group Co.,Ltd.,Jinan 250101,China)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第4期567-574,共8页
Journal of Northeastern University(Natural Science)
基金
中央高校基本科研业务费专项资金资助项目(N2001001,N182608003).
关键词
急倾斜薄矿脉
中深孔
抵抗线
孔间距
数值模拟
steeply narrow vein
medium deep hole
burden
hole spacing
numerical simulation
