高压水射流破碎煤体过程及应力变化规律的数值分析  

Numerical Analysis of Coal Breakage Process and Stress Change Law Under High Pressure Water Jet

作　　者：蒋一峰[1,2] 杜锋 刘昂[1] 王亮[1] 辛程鹏[3] JIANG Yifeng;DU Feng;LIU Ang;WANG Liang;XIN Chengpeng(College of Resources and Safety Engineering,CUMTB,Beijing 100083,China;China Electric Power Research Institute,Beijing 100192,China;School of Mining Engineering,Guizhou University of Engineering Science,Bijie 551700,China)

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]中国电力科学研究院有限公司,北京100192 [3]贵州工程应用技术学院矿业工程学院,贵州毕节551700

出　　处：《矿业安全与环保》2018年第4期1-5,11,共6页Mining Safety & Environmental Protection

基　　金：国家重点研发计划项目(2016YFC0801402;2016YFC0600708);国家自然科学基金项目(51474219);贵州省科技支撑计划项目(黔科合支撑[2017]2820)

摘　　要：针对高压水射流冲击破碎煤体这一复杂非线性冲击动力学问题,采用SPH和FEM耦合算法,数值模拟了煤体在高压水射流冲击下的破碎过程,分析了应力作用规律和煤体破碎规律。研究结果表明,煤体主要受拉伸和剪切作用而被破坏,拉应力的作用区域随着煤体破碎向外延伸,剪切应力的作用区域主要在冲击轴心;水射流冲击载荷破煤过程可分为破碎积累、快速破碎2个阶段,煤体破碎速度表现为快慢交替。For the complex nonlinear impact dynamic problem of impacting coal with high pressure water jet,the coupling algorithm of smoothed particle hydrodynamics（SPH） and finite element method（FEM） was used to simulate the crushing process of coal under the impact of high pressure water jet,the law of stress and coal breakage was analyzed. According to the results,the coal is mainly damaged by the tensile and shearing. The action zone of tensile stress extends outward with the coal breakage while the shear stress mainly affects the impact axis. The process of coal breakage by impact load of water jet can be divided into two stages of crushing accumulation and rapid crushing. The crushing speed of coal shows the alternation of fast and slow.

关 键 词：高压水射流 冲击 破煤 数值模拟 应力 

分 类 号：TD712.6[矿业工程—矿井通风与安全] TD311