Abstract: With the exploitation of deep mineral resources,the spontaneous combustion of sulphide deposits is a major problem affecting the safety of underground production.Measuring the temperature change of ore itself is one of the important parameters to predict ore spontaneous combustion.Firstly,the principle of infrared thermometer is described,and then the infrared thermometer is used to carry out experiments on powder heap,large rhombic ore and small conical ore heap.The main purpose of this paper is to determine the relationship between the temperature of different points on the surface of the three kinds of ore heap with distance.The experimental results show that the error of powder measurement has nothing to do with the distance,and the errors of large and small blocks are between 10cm and 40cm and from 50cm to 70cm,respectively.The experimental results provide reliable theoretical data for field detection and the establishment of prediction model in the future.

Key words: thermometry,infrared radiation thermometer,selfignition,sulfide ore