摘要
为了研究在高压水射流作用下水射流辅助机械截齿破岩和机械截齿单独破岩两种破岩效果的差别,利用LS-DYNA仿真软件,采用有限单元法FEM、光滑粒子流体动力学方法SPH相结合的建模方法,对旋转破岩过程进行仿真研究。研究结果表明:镐形截齿破岩过程中密实核真实存在;高压水射流压力在岩石模型强度以下时,截割力峰值相对于机械截齿单独破岩有所降低,但比能耗没有明显降低;高压水射流压力大于岩石模型强度时,截齿受力综合水平、比能耗均有明显改善。
In order to study the difference between two different broken rock way , whick included cutting pick broken rock with auxiliary of high pressue water jet and single cutting pick broken rock, then software LS-DYNA was used, the detailed model was built with finite element method and smooth particle fluid mechanics method (SPH), and rotary broken rock process was simulated. The results showed that densely core exist during broken rock process with conical bits, the cutting peak value was smaller than single broken rock with cutting pick when the pressure value of water was smaller than the strength of rock model, but specific energy consumption decreased unconspicuous, stress state of cutting pick and specific energy improved obviously, when water jet pressure more than rock model strength.
作者
段新奇
江红祥
郭楚文
DUAN Xin-qi;JIANG Hong-xiang;GUO Chu-wen(Mechatronic Engineering School, China University of Mining & Technology, Xuzhou 221008, China;Electric Power Engineering School, China University of Mining & Technology, Xuzhou 221008, China)
出处
《煤矿开采》
北大核心
2016年第4期10-14,共5页
Coal Mining Technology
基金
江苏省自然基金项目(BK20151147)
中国博士后科学基金项目(2015M581880)
关键词
高压水射流
截齿
破岩
LS-DYNA
high pressure water jet, cutting pick, broken rock, LS-DYNA
