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随着我国采矿工业的飞速发展,金属矿山地下深孔爆破的应用范围不断扩大。在深孔大爆破设计与施工中,网路设计计算和导通是一个复杂而重要的环节,它直接关系到爆破的成败,必须慎重对待。下面仅就我们在实践中遇到的有关问题,谈一些看法。一、网路联接形式和计算方法在我国矿山大爆破中,网路联接形式基本上有两种:一种是每个炮孔并联两个雷管,然后把若干对并联雷管串联起来,组成一个串组,再把各串组并联于分支联接线上,称为并串并网路,如图1所示。另一种是每个炮孔装一个雷管,然后把10～20个雷管串联为一组,再把各组并联于分支联接线上,称为串并网路,如图2所示。
With the rapid development of mining industry in our country, the application scope of deep-hole blasting in underground metal mines is expanding. In deep hole blasting design and construction, network design calculation and conduction is a complex and important part, which is directly related to the success or failure of blasting and must be treated with caution. The following is a brief discussion on the relevant issues we encountered in practice. First, the network connection form and calculation method In our mine blasting, there are basically two forms of network connection: one is each blasthole in parallel with two detonators, and then a number of pairs of parallel detonators in series to form a string Group, and then each string parallel connection in the branch connection line, known as parallel and parallel network, as shown in Figure 1. The other one is equipped with a detonator for each borehole, and then 10 to 20 detonators in series as a group, and then each group in parallel with the branch connection line, called the string and the network, as shown in Figure 2.