摘要
以水泥砂浆试块为试验模型,采用超动态应变测试和数据采集处理系统进行空气不耦合装药和水耦合装药爆破试验,测定几种不耦合系数下炮孔周围介质中爆炸应力的分布特性。通过对试验结果分析研究表明,水耦合装药与空气不耦合装药相比爆炸峰值压力高、作用时间长,即表明水耦合装药的爆破作用强度大、能量利用率高。试验结果还进一步证明了不耦合装药能够明显降低炮孔周围介质中的压应力,且不耦合系数越大,压力降低越显著。在实际工程爆破中应根据工程要求和岩石性质及作业条件,合理选择装药结构。
Using the cement mortar coupons as test models and adopting the system of high dynamic strain indicator measurement and data acquisition treating, the distribution character of blasting stress within boreholes＇medium under some variable decouple coefficients were measured. Through analysis of the model test results, the following conclusions can be drawn. Water-couple charge has a higher blasting peak stress and longer effect time by comparing with air-decouple charge. That means blasting of water-couple charge has a bigger blasting effect strength and higher energy usage ratio, which can improve the breaking effects. The test results also demonstrate that decouple charge can decrease the pressure within boreholes^medium obviously. The larger decouple coefficient is, the more notable pressure decrease is. In practical blasting engineering, reasonable charge structure should be selected in accordance with engineering commands and the conditions of rock and construction.
出处
《实验力学》
CSCD
北大核心
2006年第3期393-398,共6页
Journal of Experimental Mechanics
基金
安徽省教育厅自然科学基金重点课题
