求翻译：采煤机滚筒自适应调高核心为采煤机依据工作面煤层和岩层分界情况，自动调节滚筒的升降高度，达到最佳的割煤效果。目前，基于传感器直接测量的煤岩界面识别学者们做了很多有意义的研究，如射线法[3]、雷达探测法[4]、截齿应力法[5]、光电传感法[6]、振动法[7]、多传感器融合法[8]等。但是由于煤层地质结构的复杂性、采煤机工作环境恶劣、煤岩性质及采煤路线时变、综采机械化对顶底板的要求以及传感器稳定性差等方面的问题，上述直接识别煤岩界面的方法一直未得到广泛的应用[9]。是什么意思？

正在翻译，请等待...

Coal-to-high-roller from core to surface coal mining machine based on coal and rock formations, and boundaries of the self-adjusting roller lift height, to achieve the best cut coal. At present, based on sensor is a direct measurement of the coal and rock interface identify scholars have done a lot

The coal mining machine drum auto-adapted accent high core rests on the working surface coal bed and the rock layer dividing line situation for the coal mining machine, the automatic control drum fluctuation altitude, achieves the best coal cutting effect.At present, distinguished the scholars based

Adaptive adjustment of Shearer coal mining machine based on core for high working face coal seam and strata boundaries, automatic adjustment of the roller lifting height, optimal cutting coal effect. At present, the direct measurement of coal-rock interface recognition based on sensor scholars have

正在翻译，请等待...