基于光滑粒子流体动力学耦合有限元方法的水射流破煤参数数值模拟分析

Numerical Simulation Analysis of High Pressure Water Jet Breaking Coal Parameters Based on Coupling Algorithm of Smoothed Particle Hydrodynamics and Finite Element Method

利用非线性冲击动力学软件LS-DYNA,采用光滑粒子流体动力学(SPH)耦合有限元单元(FEM)方法,模拟了高压水射流微观破煤过程。根据模拟结果,红岭煤矿二1煤层水力扩孔最佳喷嘴直径为2.0~2.5 mm,临界破煤压力为10 MPa,最佳破煤压力为20~22 MPa。

Using nonlinear impact dynamics software LS-DYNA,and the method of smoothed particle hydrodynamics（SPH） coupling with finite element method（FEM）,we simulate the micro process of breaking coal under high pressure water jet. According to the simulation results,for hydraulic reaming operation in Ⅱ1coal seam,the best nozzle diameter is 2. 0 mm to 2. 5 mm; the critical breaking coal pressure is 10 MPa,and the best breaking coal pressure is 20 MPa to 22 MPa.