抽水蓄能电站主机房底板精确控界切割技术研究  

Technical study on accurate-boundary cutting in baseboard excavating of main equipment room in pumped storage power station

作　　者：毛羽 侯超普 徐士超 李彬 顾云 程建辉 刘迪 MAO Yu;HOU Chao-pu;XU Shi-chao;LI Bin;GU Yun;CHENG Jian-hui;LIU Di(State Grid Xinyuan Shanxi Datong Pumped Storage Power Company Limited,Datong 037000,Shanxi,China;Nuclear Industry Nanjing Construction Group Co.,Ltd.,Nanjing 210000,China)

机构地区：[1]国网新源山西大同抽水蓄能有限公司,山西大同037000 [2]核工业南京建设集团有限公司,南京210000

出　　处：《工程爆破》2024年第3期121-127,共7页Engineering Blasting

基　　金：国网新源集团公司科技基金资助项目(SGXYKJ-2021-143)。

摘　　要：抽水蓄能电站主机房底板爆破开挖时,对其平整度及保留岩体完好度要求很高,传统爆破方法会带来底板开挖边界控制精度差、装药量大、保留岩石损伤严重及环境危害大等问题。为克服上述缺点,提出沿主机房底板水平钻凿炮孔并侧向预切槽,沿切槽多点双向设置聚能装药进行岩石控界爆破的方法。首先采用数值模拟正交分析方法对工业炸药装填的聚能装药参数进行了优化,然后根据优化结果制作了聚能切割装置并在实地进行了试验。试验结果表明,当炮孔中双向聚能射流控界切割装置的平均线装药密度为150 g/m、孔距0.5 m时,爆破后就可以在炮孔间岩体产生精确的贯穿性裂纹。相较于传统爆破方法,该控界切割爆破方法在保证切割面精确的同时,大幅度地减少了装药量,降低了保留岩体的损伤程度和对周围环境的影响。When excavating baseboard of main equipment room in pumped storage power station,the requirement to planeness and integrality of reserved rock are high.The traditional blasting methods have disadvantages such as poor accuracy of excavating boundary,large charge amount,severe damage to the reserved rock,great impact on environment,and so on.To overcome these disadvantages,a blasting method is put forward to achieve accurate-boundary cutting on hard rock,in which the blasting holes drilled horizontally along the baseboard boundary are grooved and dotty shaped charge are set bilaterally along the groove.Firstly,the parameters of shaped charge filled by industrial explosives are optimized by orthogonal numerical simulation method.Then,shaped charge cutting devices are assembled using the optimized parameters and tested at a blasting site.The test result shows a precisely positioned penetrating cracks are created between blasting holes using the blasting method proposed in this paper,when linear charge density of the cutting devices is 150 g/m and hole spacing is 0.5 m.Compared with traditional blasting methods,this method can ensure accurate cutting boundary.Also,by using the proposed method,charge quantity is cut down,damage degree of the reserved rock and impact on the surrounding environment is reduced.

关 键 词：聚能射流 抽水蓄能电站 主机房底板 控界切割 聚能装药 爆炸破岩 

分 类 号：TB41[一般工业技术] TD235[矿业工程—矿井建设]