采煤机作业夹矸煤层性质对截齿受力的影响

Influence of Coal Seam Properties on the Force on the Cutting Teeth During the Operation of Coal Mining Machines

采煤机是煤矿综采的重要设备,截齿是直接作用于煤岩的部件,在截割过程中受煤岩的影响较大。我国的煤层分布大多含有一定的夹矸层,夹矸分布的位置及厚度对采煤机截齿产生的截割力具有较大的影响。针对夹矸煤层性质不同截齿的受力变化,采用MATLAB进行建模计算。结果表明,夹矸在硬煤及软煤中均以中间位置时产生的截割力最大,且夹矸的厚度越大,则较大的截割力作用时间越长。

The coal mining machine is an important equipment for comprehensive mining in coal mines.The cutting teeth are components that directly act on the coal and rock,and are greatly affected by the coal and rock during the cutting process.The distribution of coal seams in our country mostly contains certain interlayers,and the location and thickness of the interlayers have a significant impact on the cutting force generated by the shearer teeth.MATLAB was used to model and calculate the stress changes of different cutting teeth in the coal seam with different properties.The results show that the maximum cutting force is generated when the gangue is in the middle position in both hard and soft coal,and the thicker the gangue,the longer the action time of the larger cutting force.