煤矿安全2024，Vol.55Issue(1)：14-21,8.DOI:10.13347/j.cnki.mkaq.20221041
基于ALE算法的连续水射流破煤特征数值模拟研究
Numerical simulation of coal breaking characteristics by continuous water jet based on ALE algorithm
摘要
Abstract
In order to explore the influence of environmental media on the characteristics of water jet coal breaking,ALE algorithm and LS-Dyna software are used to carry out numerical simulation of continuous water jet impact coal breaking and the characterist-ics of water jet propagation,coal breaking characteristics and time-varying characteristics of the relationship between the two coal breaking depths under the submerged and non-submerged environments are analyzed.The results show that because of the large loss of water jet,the jet velocity in submerged environment is much lower than that in non-submerged state.Under the obstruction of en-vironmental medium,the submerged jet diverges and increases the area of broken coal,resulting in the increase of the area of broken coal and the decrease of the depth,but the damage element does not change much.It is necessary to prolong the impact time reason-ably or reduce the spacing of boreholes when coal caving is carried out in submerged environment.关键词
瓦斯抽采/水力冲孔/卸压增透/水射流破煤/淹没状态Key words
gas drainage/hydraulic flushing/pressure-relief and permeability improvement/water jet coal breaking/submerged condition分类
矿业与冶金引用本文复制引用
郝从猛,陈学习,刘清泉,金霏阳..基于ALE算法的连续水射流破煤特征数值模拟研究[J].煤矿安全,2024,55(1):14-21,8.基金项目
国家自然科学基金青年科学基金资助项目(52204211) （52204211）
国家重点研发计划资助项目(2021YFC3001300) （2021YFC3001300）
