关键词: 光纤传感技术, 火区探测, 数值模拟, 老石旦煤矿

Abstract: In order to prevent the spontaneous combustion of the coal in the goaf of the 16401 working space of the LaoShidan coalmine, the optical flow sensing system, the oxygen concentration distribution and the temperature distribution of the goaf are detected in real time by using the optical fiber sensing system pre-buried in the channel. According to the preset mathematical model of CFD software, the velocity field cloud map, O2 concentration field cloud map and temperature field cloud map are constructed, and the consistency between the calculated value and the measured ones is established by the model to determine the accurate range of the “three belts” in the goaf of 16401 working space. The distance from 0 to 54m is the heat dissipation zone, 54m~88m is the oxidizing spontaneous combustion zone, and the suffocation zone is more than 88m. The measured data provides a solid theoretical basis for the feasibility of fire prevention measures in the goaf of the 16401 working space in the Lao-Shidan coalmine.