河道冰体的可爆性研究

Blastability Study of Streamway ice Body

冰是一种特殊的固体介质,具有非均匀性、各向异性、应变速率及温度敏感性等特点。本文以黄河爆炸破冰为背景,针对-10℃冰体结构与物理力学性能进行检测,以及冰体在不同加载条件下,所表现的响应特征与破坏特征进行了试验研究。通过分析冰晶体结构与冰内气泡特征,冰体在静载条件下的塑性破坏特征,以及对冰体对爆炸冲击载荷的响应特征,获得冰体的可爆性能与破碎单位体积冰体所需炸药能量计算公式。研究成果可为黄河冰体爆破作业提供理论依据。

The ice is an exceptive solid medium with many characteristics ,such as heterogeneity、anisotropy and sensitivity to strain rate and temperature etc .On the background of Yellow River ex-plosive ice-breaking ,the structure and mechanical properties of -10℃ ice body were checked .The experiment studies were carried on about ice body response and failure characteristics with different loading .T hose data are analysed w hich include ice crystal structure and air bubble characteristics inner ice ,ice body＆#39;s plastic failure characteristic with static loading ,response characteristic with explosive dynamic loading .From which ,that are obtained such as ice body blastability and the computational formula of explosive energy for breaking unit volume of ice body .The research results can provide bas-ic theory evidence for explosive task of Yellow River ice body .