巷道无掏槽爆破模型实验研究

Experimental Study on Tunneling Model by Cut-free Blasting

为了研究无掏槽爆破机理,实施无掏槽爆破模型实验,并设置直眼掏槽和锥眼掏槽爆破对照实验组,对巷道模型中水泥试块的应变变化及无掏槽爆破过程进行测试分析。实验表明:无掏槽爆破的掏槽效果最好,几乎无残孔,且应变持续时间最长,出现2次应变峰值,后段应变峰值大于前段。

In order to study the mechanism of cut-free blasting,the model experiments of cut-free blasting were investigated,as well as the parallel cut and taper cut were set as the contrast experiment groups.The strain change of cement test blocks in the roadway model was tested and the complete cut-free blasting process was recorded.The experiment results showed that the cutting effect of cut-free blasting was the best of all with almost no residual holes,the strain duration of cut-free blasting which had two strain peaks was the longest of all,and the strain peak in the back section was higher than that in the front section.