矿井环境粉尘浓度的测量与治理一直是采矿行业安全发展的一项难题。为了实现对井下场所粉尘浓度安全、实时地监测, 研究采用内腔式循环系统获得实验粉尘的空间均匀分布, 采用双光路光纤差分测量法解决探测窗口表面的落尘问题。以玉米粉为研究对象, 注入5种不同粉尘质量, 通过计算粉尘质量浓度与衰减系数之间的比例系数, 校准获得粉尘质量浓度的测量值, 测量结果与理想计算粉尘质量浓度曲线基本吻合。研究发现, 双光路光纤差分测量法可有效解决探测器表面的落尘问题, 可为矿井环境粉尘浓度光纤监测技术的工程应用提供参考。

The measurement and control of dust concentration in mine environment is always a difficult problem for the safety development of mining field.The uniform spatial distribution of experimental dust was observed by an internal-cavity circulation system, and a two-optical fiber differential measurement method was adopted to solve the problem of dust precipitation on the surface of the detection window, both of which could contribute to the safe and real-time monitoring of dust concentration in the downhole location. Thus, taking cornmeal powder as the research example, the measured value of dust mass concentration was calibrated by calculating the ratio of the dust mass concentration to attenuation coefficient under 5 different injection masses, which led to a basically agreement of the measured results and the ideal calculated value in the curve. It is found that the two-optical fiber differential measurement method can effectively solve the dust problem on the surface of the detector and can provide a reference for the engineering application of dust-concentration optic fiber monitoring technology in the mine environment.