文献类型：期刊文献

中文题名：爆炸冲击荷载下扩腔体积和能耗随抵抗线的变化规律研究

英文题名：A study on the variation of cavity volume and energy dissipation with resistance line under blast impact load

作者：雷振 黄永辉 陈文梦 张智宇 周继国

第一作者：雷振

通信作者：Zhang, Zhiyu

机构：[1]贵州理工学院矿业工程学院,贵阳550003;[2]昆明理工大学电力工程学院,昆明650500;[3]昆明理工大学国土资源工程学院,昆明650093

第一机构：贵州理工学院矿业工程学院

年份：2021

卷号：40

期号：4

起止页码：66-71

中文期刊名：振动与冲击

外文期刊名：Journal of Vibration and Shock

收录：CSTPCD;;EI(收录号：20211210101002);Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：国家自然科学基金(51664007,52064025)。

语种：中文

中文关键词：模型试验;扩腔;最小抵抗线;能耗

外文关键词：model test;expansion of cavity;line of least resistance;energy consumption

摘要：针对柱状药包爆炸冲击荷载下炮孔周边岩体介质扩腔体积和能耗占比问题,采用爆破破岩和断裂力学理论,结合爆炸具有瞬时、高温、高压等极端态特性,构建了仅以单轴动态抗压为主要依据的过度粉碎区岩石破碎能耗的简易计算公式,并开展了模型试验研究。该研究结果表明:随着最小抵抗线由120 mm增加到200 mm,扩腔半径由炮孔半径的2.6倍增加到4.6倍,扩腔体积增加了3.56倍,呈现明显的指数增长趋势;能耗由524 J增加到1870 J,能耗占比由5.93%上升到21.13%,与现有的研究成果基本一致,验证了计算公式的可行性。该研究结果能够为光面爆破、预裂爆破等控制爆破技术的设计和施工提供理论依据。
In view of the problems of the shock load volume and energy consumption proportion around rock mass media under the impact load of a columnar cartridge,a simple calculation formula for rock crushing energy consumption in the excessive crushing zone was built based on uniaxial dynamic compressive force,with the theory of blasting rock and fracture mechanics and some extreme characteristics of the explosion,such as instantaneous,high temperature,and high pressure.And then a model test study was carried out.The results show that:with the minimum resistance line increased from 120 mm to 200 mm,the cavity radius increased from 2.6 times to 4.6 times of the hole radius,and the cavity volume increased by 3.56 times,which presented an obvious exponential growth trend.The energy consumption increased from 524 J to 1870 J,and the proportion of energy consumption increased from 5.93%to 21.13%,which was basically consistent with the existing research results and these results verified the feasibility of the calculation formula.The research results in this work can provide theoretical basis for the design and construction of smooth blasting,pre-splitting blasting and controlled blasting.