摘 要 由于煤岩结构及性质的复杂性，使得在综合机械化采煤过程中采煤机的截割过程变得尤为复杂，而采煤机截割性能的优劣对于整机的运行可靠性与稳定性、生产效率、功率消耗、截齿寿命，以及煤岩的破碎率等均具有直接的影响。为此，不少学者采用力学分析、实验研究、有限元等方法，对采煤机截齿的截割性能进行了大量而深入的研究。但由于煤岩属于不连续介质，采用传统有限元方法对煤岩进行本构建模具有一定的局限性，难以对煤岩截割破碎率进行仿真。 本文采用离散弹簧元法与有限元法相结合的方法，对采煤机单齿截割过程进行仿真研究。为此，通过对煤岩的物理特性及力学性质、截齿截煤过程，以及影响截割性能因素的深入分析，认为煤岩属于一种不连续介质，其破碎过程具有大变形、非线性的特征。而离散弹簧元法（DLSM）是近几年提出的一种用于岩土工程领域中解决不连续介质问题的数值模拟方法，采用这一方法构建煤岩本构模型不失为一种新的思路。故此，本文采用基于离散弹簧元法的软件RockBox3D-MLS构建了煤岩本构模型，并通过单轴压缩仿真方法对所建煤岩本构模型进行验证，所得应力应变曲线与理想弹塑脆性模型应力应变曲线基本吻合，由此表明所建模型的正确性；采用有限元法，在ANSYS软件环境中建立了截齿的结构模型，并将截齿模型单元信息导入RockBox3D-MLS软件环境中，构建了“截齿-煤岩”截割过程的复合模型；利用RockBox3D-MLS软件求解器进行仿真，仿真包括在不同楔入角和不同截割厚度条件下，模拟截齿截割煤岩过程，得到了相应工况条件下的煤岩破碎率，分析了不同截割参数在截割过程中对煤岩破碎率的影响。 仿真结果表明，采用离散弹簧元法和有限元法构建的“截齿-煤岩”截割过程的复合模型，并通过该模型进行采煤机单齿截割过程仿真的有效性，从而为采煤机截割煤岩的动态建模和仿真分析提供了一种新思路。

ABSTRACT Because of the complexity of structure and properties of coal, the coal mining p-rocess in mechanical cutting process become more complex, and shearer cutting performance in reliability and stability, production efficiency, power consumption, life of bitof running machine, and the coal crushing rate has direct influence. Therefore, many scholars by mechanical analysis, experimental study, finite element method, the researches on cutting performance of shearer picks. But because of coal and rock is discount-inuous medium, using the traditional finite element method for the constitutive modelhas some limitations on coal and rock, it is difficult for coal cutting broken rate sim-ulation. This method uses discrete spring element method combined with finite element method, the coal mining machine for single tooth cutting process simulation. Therefore,the physical properties and mechanical properties of coal and rock, pick coal cutting process, and analyzes the influence of cutting performance factors, that the coal rockbelongs to a discontinuous medium, characteristic of the crushing process with large d-eformation, nonlinear. The discrete spring element (DLSM) is a kind of simulation m-ethod for numerical solution of discontinuous media problem in the field of geotechni-cal engineering in recent years, with the method of construction of coal and rock constitutive model is a new way of thinking. Therefore, this paper adopts discrete spring element method (DLSM) based on the software RockBox3D-MLS to build a coal rock constitutive model, and through the uniaxial compression simulation method of the coal and rock constitutive model is verified, the stress-strain curve and the ideal elastic-plastic model of stress and strain curves of based the anastomosis, co-rrectness of the show the model; finite element method, in the environment of the A-NSYS software structure model of tooth is established, and the tooth model unit info-rmation into the RockBox3D-MLS software environment, constructing a "pick-coal-rock" section composite model of cutting process; simulation with RockBox3D-MLS solver,including simulation at different wedge angles and different cutting depth conditions,si-mulation of cutting process of coal rock, the rock breaking rate corresponding conditi-ons, analyzes the influence of different cutting parameters on cutting process for coal and rock breakingrate. The simulation results show that, using the discrete spring element method and t-he finite element method to build the "pick - coal rock" cutting process model, and t-he validity of the shearer single tooth cutting simulation based on this model, the dy-namic modeling and simulation analysis in order to cut coal for Shearer has provide anew ideas.