To make measure and research on the infrared hot image in the deformation and destruction course under pick cutting is carried out in order to analyze the deformation and destruction law. To change the pick type

cutting speed

cutting depth

tooth style and measuring position is carried out

so as to measure its infrared picture. It is found that there appears a bar of high-temperature district in the direction vertical to cutting direction while knife teeth are cutting the coal. While there is a point of high-temperature district when point-attack pick cuts the coal. The faster the cutting speed is

the more obvious the heat effect will be. In the course of pick cutting

the highest temperature value in temperature field is relative to cutting depth and mechanical characters. The deeper the cutting depth is

the highest temperature is in the temperature field. The bigger the tensile strength

compression strength

adhesion stress and inner friction angle are

the highest temperature is in high temperature district.