中文摘要：

随着煤层开采厚度的增大，刨煤机刨头的高度相应增大，刨煤时，煤壁的作用力使刨头出现不稳定的情况。通过对刨头的受力以及刨头稳定性的影响因素进行分析，得出刨头高度和刨削深度是影响刨头稳定性的重要因素的结论，并结合实例得到了刨头高度和刨削深度的影响规律。研究结果为确定刨头支撑架的安装高度提供了理论依据，为进一步采取措施提高刨头的稳定性提供了理论基础。

英文摘要：

With the increase of coal seam thickness, the height of plow body increases correspond- ingly. During cutting coal,acting forces of coal made plow body instability. Analyzing the acting force on plow body and the factors influencing on the stability of plow body, the height of plow body and cutting depth were the important factors on stability of plow body. And the change rule of plow body stability influenced by plow body height and cutting depth was obtained with an example. It provides references for determining the installation height of the support, and provides theoretical basis for fur- ther measures to improve the stability of plow body.