爆破方法对岩石爆破块度分布影响的试验研究  

Experimental Study on Influence of Excavation Method on Rock Blasting Fragmentation Distribution

作　　者：岳志坤 李瑞泽 李福千 陈明[2,3] 尹岳降 聂攀 秦健飞[4] YUE Zhi-kun;LI Rui-ze;LI Fu-qian;CHEN Ming;YIN Yue-jiang;NIE Pan;QIN Jian-fei(Power China Railway Construction Co Ltd,Beijing 100044,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Ministry of Education,Wuhan University,Wuhan 430072,China;Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering,Ministry of Education,Wuhan University,Wuhan 430072,China;Sino-hydro Eighth Bureau Co Ltd,Changsha 410004,China)

机构地区：[1]中国电建集团铁路建设有限公司,北京100044 [2]武汉大学水资源与水电工程科学国家重点实验室,武汉430072 [3]武汉大学水工岩石力学教育部重点实验室,武汉430072 [4]中国水利水电第八工程局有限公司,长沙410004

出　　处：《爆破》2019年第3期9-15,共7页Blasting

基　　金：国家自然科学基金面上项目(51779190);湖北省技术创新专项重大项目(2017ACA102)

摘　　要：爆破块度分布对岩体开挖施工的下游生产工序有重要影响。在深圳赤湾停车场开展了12次爆破试验,利用图像分析技术研究了使用垂直孔复合消能爆破和水介质换能爆破技术开挖时爆破块度分布规律。结果表明:开挖方法对爆破块度分布有重要影响,垂直孔复合消能爆破和水介质换能爆破技术有助于改善岩石爆破块度分布;两种开挖方法得到的爆堆岩石块度分布较常规开挖方式均匀,大块率小;12m和8m垂直孔复合消能爆破试验爆破平均块度较常规试验分别小35.01mm、13.91mm,降低幅度分别为10.1%、4.08%;水介质爆破试验爆破平均块度较常规试验小25.24mm,降低幅度为7.26%。The blasting fragmentation distribution has a great influence on the downstream production process of rock mass excavation construction.12 blasting tests were carried out at Chiwan parking lot in Shenzhen.Based on 6 vertical borehole shock-reflection blasting technique tests and 1 water medium energy exchange blasting test,the influence of excavation method on rock blasting fragmentation distribution was studied by image analysis.The results show that:The excavation method has an important influence on the blasting fragmentation distribution.The vertical borehole shock-reflection blasting technique and water medium energy exchange blasting technique are helpful to improve the blasting fragmentation distribution.The blasting fragmentation distribution is more uniform and the boulder frequency is smaller than that of conventional methods.The average blasting fragmentations of 12 m and 8 m vertical borehole shock-reflection blasting test were 35.01 mm and 13.91 mm,respectively,which were smaller than the conventional tests,and reduction rates were 10.1 % and 4.08 % respectively.In the water medium energy exchange blasting test,the mean fragmentation size was 25.24 mm smaller than that of the conventional test,with a reduction rate of 7.26 %.

关 键 词：爆破块度 垂直孔复合消能爆破 水介质换能爆破 台阶爆破 图像分析 

分 类 号：TD235[矿业工程—矿井建设]