立井井筒掘进爆破模型试验超动态应变测试系统设计  

Design of Super Dynamic Strain Testing System of Shaft Blasting Model Experiment

作　　者：马芹永[1] 袁璞[1] 韩博[1] 张经双[1] 

机构地区：[1]安徽理工大学土木建筑学院,淮南232001

出　　处：《爆破》2013年第4期50-53,74,共5页Blasting

基　　金：高校博士点基金(20133415130001)

摘　　要：为研究矿山立井井筒掘进爆炸应力波对周围岩体的作用机理,以掏槽眼和崩落眼为原型,设计了二圈和三圈炮眼爆破模型,炮眼采用预埋钢筋法成孔。针对爆炸应力波信号易失真、难测试等特征,通过试验检验了由应变片、超动态应变仪和动态测试分析仪组成的超动态应变测试系统。爆破模型试验记录应变信号表明,应变波形信号由压缩相和拉伸相构成,且波形段数和段间时差分别与电雷管的段别和起爆延迟时间相对应。超动态应变测试系统满足爆炸应力波的测试要求,并能稳定可靠地采集爆炸应力波作用区混凝土模型内测点的应变信号。In order to study the mechanism of explosive stress wave on the surrounding rock mass in mine shaft excavation,the concrete models with two circle blasting holes or three circle blasting holes were designed to conduct blasting model experiments with cutting hole and breaking hole as the prototype.And the blasting holes were formed by embedded steel bar method.Aiming at the distortion of explosive stress wave signal and difficulty in test,a super dynamic strain testing system composed of strain gage,super dynamic strain amplifier and dynamic testing analyzer was established.Strain signal recorded from blasting model experiment showed that actual strain signal consisted of compression phase and tensile phase,and the number of waveforms and time differences between waveforms were corresponding to the number of electric detonator type and initiation delay time respectively.The super dynamic strain testing system could meet the requirements of explosive stress wave testing and record the concrete model strain signal stably and reliably in action area of explosive stress wave.

关 键 词：爆炸应力波 动态应变 测试系统 爆破模型 井筒 

分 类 号：O348.2[理学—固体力学]