The coal cutting process and method of the shearers cutting teeth

The shearer cutter is a type of cutting tool that enterprises can use to directly crush coal. The shearer is the main technical equipment that can be used to achieve modernization of coal construction in China. However, in the social work environment engineering, the cutting teeth of the coal mining machine are often subjected to strong impacts and wear from students during work, and the cutting teeth also frequently wear out. The detachment and fragmentation of the cutting head also occur frequently. Therefore, the work of replacing the cutting teeth will become more frequent. During use, teachers can effectively reduce rural labor and ensure the safety of company employees. The work of the cutting teeth plays a major role in the construction management process of the coal mining machine, which directly affects the development of coal mining costs.
The entire cutting process of the shearer cutter is divided into four stages: deformation stage, crack formation stage, compacted rock core formation stage, and coal rock collapse stage. When the shearer starts feeding, the cutting teeth enter the coal and rock under the action of the shearer drum, forming compressive stress, causing the surface of the coal and rock to begin to deform. After coal mining, it repeatedly moves on the coal wall, continuously increasing cutting force. When the shear stress of the cutting tooth is greater than the shear strength of the coal rock, cracks will appear on the surface of the coal rock.
After the crack occurs, the cutting teeth continue to move over a larger range, and then more cracks are generated. When all the cracks develop and converge, coal rock fragments will form until the rock fractures, thus completing the process of cutting and crushing the rock.