刮板输送机是煤矿井下工作面综采设备中最关键的输送设备，而中部槽是运输煤炭的载体，是刮板输送机中数量最多、最重要的组成部分，它的强度、可靠性及过煤寿命决定着整套工作面刮板输送机的可靠性和过煤寿命。 目前，随着我国高产高效大型矿井的不断扩建，我国综采工作面运输、转载设备也向着大型高端方向发展以适应我国煤矿市场的要求。 本文根据工作面刮板输送机实际运行中的受力情况对中部槽在推溜和拉架两种工况下建立力学模型，进行受力分析。并以此为基础利用Pro/ENGINEER和ANSYS软件强大的CAD/CAE功能，对大功率、超重型刮板输送机中部槽及联接哑铃进行有限元强度分析和研究。根据中部槽在煤矿井下使用中非正常失效的现象，重点分析中部槽凸凹端头和哑铃窝两个关键部位，为中部槽的强度计算和结构改进提供理论依据。通过受力分析和有限元计算，从结构上解决中部槽和联接哑铃在实际使用中可能存在的问题，保证中部槽的可靠性及使用寿命。

The scraper conveyor is the most important conveying equipment in underground mechanical mining system. And the middle pan is carrier of transportation coal.,because it is the most and the most important portion of the scraper conveyor,so the reliability and service of the scraper conveyor depend on middle pan’s strength and reliability and service life. At present, with extending of high output and efficient large mines,conveying equipment and bridge stage loader in underground mechanical mining system in china are developing toward large-scale programming and advanced techniques for adapting the needs of the society. In this article，based on stress of scraper conveyor’s working , establishing solutions of pushing pans and pulling f frames for stress analysis, and utilizing strong function of CAD／CAE of Pro/ENGINEER and ANSYS software，the middle pan of superpower and overheavy scraper conveyor has been analyzed and studied in strength by 1imited element method．According to irregular damage of the middle pan,the two key components of middle pan：the joints of locating sigma part and dumbbell location have been mainly analyzed by calculation，provided scientific basis for structural improvement and strength calculation. the problems of middle pan and dumbbell that maybe exist in practice use are solved in product structure，therefore the reliability and service life of middle pan are been guaranteed．