复杂煤层赋存条件下工作的采煤机，其螺旋滚筒所受载荷具有非线性、时变性、冲击性和强耦合性，磨损问题不可避免，且严重影响其工作性能和生产效率。基于虚拟样机技术，采用离散元数值模拟方法研究含夹矸煤层条件下螺旋滚筒的磨损特性，以提高其截割性能、延长其使用寿命。以煤岩截割机理和离散元素法为基础，分析了滚筒与煤岩体间相互作用关系及滚筒磨损模型;以MG2×55/250-BW型采煤机螺旋滚筒为工程对象，采用Hertz-Mindlin with bonding黏结模型为颗粒间接触模型、Hertz-Mindlinwith Archard Wear模型为煤岩体与滚筒间接触模型，利用Proe/E与EDEM建立滚筒截割含夹矸煤层耦合模型;采用正交试验法，分析采煤机牵引速度、滚筒转速、螺旋升角和煤岩抗压强度对滚筒磨损问题的影响趋势，经过多元回归分析得到截齿、叶片磨损深度的评价模型;基于实际工况，综合考虑采煤机截割比能耗、载荷波动系数和生产率，构造多目标优化函数，利用MATLAB求解得到滚筒最优工作参数。基于EDEM离散元仿真分析结果，发现滚筒组件存在不同程度磨损，其中截齿齿尖局部接触区域磨损最为严重，叶片主要磨损区域为尾片齿座根部位置附近。煤岩抗压强度、采煤机牵引速度增加，截齿、叶片磨损加剧;滚筒转速增加，截齿磨损深度减小，叶片磨损深度先增加后减小;螺旋升角增加，截齿磨损深度先增加后减小，叶片磨损深度逐渐减小;其中，煤岩抗压强度是造成截齿、叶片磨损的主要因素。当截割煤岩抗压强度为30 MPa的煤层时，采煤机牵引速度为5.66 m/min、滚筒转速为80.40 r/min、螺旋升角为11.35°时，滚筒性能达到最优，此时采煤机截割比能耗为0.713 2 kW·h/m³、载荷波动系数为0.081 9、截齿、叶片和端盘的磨损深度分别为1.595 μm,1.061 7 nm和0.907 nm，生产率为315.465 5 t/h。离散元仿真结果中滚筒磨损部位分布与现场工况下滚筒实际磨损情况具有一致性，验证了建立的仿真模型与过程的可行性。基于此研究方法可实现滚筒磨损问题的定量分析，极大地降低试验成本，有助于高效、强力、耐磨滚筒的研发。

During its working process,the spiral drum completes two functions of coal-cutting and coal-loading. The load on the spiral drum of a shearer working under complex coal seam conditions has nonlinearity,time-varying,impact and strong coupling. Therefore,the wear problem of drum is inevitable,which seriously affects its working performance and production efficiency. Based on the virtual prototyping technology,the discrete element numerical simulation method was used to study the wear characteristics of drum in coal seam with gangue,so as to improve its cutting performance and prolong its service life. Based on the coal-rock cutting mechanism and the discrete element method,the interaction relationship between drum and coal-rock and the wear model of drum were analyzed. Taking the MG2×55 /250-BWD shearer spiral drum as an example,and the Hertz-Mindlin with bonding model was used as the contact model between particles,the Hertz-Mindlin with Archard Wear model was used as the contact model between coal-rock and drum,the coupling model was established for drum cutting in the coal seam with gangue by Pro / E and EDEM. The influence trend of the traction speed,the drum rotation speed,the spiral angle and the compressive strength of coal-rock on the drum wear was analyzed by using the orthogonal test method,and the evaluation models of pick and blade wear depth were obtained through a multiple regression analysis. Based on the actual working condition,the cutting ratio energy consumption,load fluctuation coefficient and productivity were comprehensively considered,the multi-objective optimization function was constructed and solved by MATLAB to obtain the optimal working parameters of the drum.The results show that the drum assembly has different degrees of wear,and the wear of the local contact area of the pick tip is the most serious. The main wear area of the blade is near the pick root of the tail piece. The compressive strength of coal-rock and the traction speed increase,the wear of pick and blade is intensified. The drum rotation speed increases,the pick wear depth decreases,the blade wear depth increases first and then decreases. The spiral angle increases,the pick wear depth increases first and then decreases,the blade wear depth gradually decreases. The compressive strength of coal-rock is the main factor causing the wear of pick and blade. When the compressive strength of coal-rock is 30 MPa,and the traction speed is 5. 66 m / min,the drum rotation speed is 80. 40 r/ min,and the spiral angle is 11. 35°,the drum performance is optimal. The cutting ratio energy consumption is 0.713 2 kW·h / m3,the load fluctuation coefficient is 0.0819, the wear depth of pick, blade and end plate are 1.595 μm,1.0617 nm and 0. 907 nm,respectively,and the productivity is 315. 4655 t / h. The distribution of the drum wear in the discrete element simulation results is consistent with the actual wear of the drum under the field condition,which verifies the feasibility of the simulation model and process. The quantitative analysis of the drum wear problem can be realized using the research method,which can greatly reduce the test cost and contribute to the research and development of efficient,powerful and wear-resistant drum.