目的 探究矿山瓦斯监控界面多个目标同时告警时的最优视觉告警编码形式。方法 以矿山瓦斯监控系统为研究背景，选取颜色、大小、字符三种视觉编码形式对注意、警告、危险三种告警等级进行单目标和双目标的视觉搜索实验。结果 通过对正确率、反应时间以及主观评分的分析发现，无论是单目标还是双目标视觉搜索实验，当界面视觉告警形式采用颜色编码时，搜索绩效最优;相比于采用字符编码，采用大小编码时的搜索时间更短，但其正确率却稍低。实验结果还发现在双目标视觉搜索实验中，告警等级的异同对反应时间具有显著性影响，告警等级相同的比告警等级不同的两目标搜索时间更短，且搜索过程中第二个目标比第一个目标更容易被发现。结论 研究结果对于提高矿山瓦斯监控系统界面的安全性，减少监控人员的认知决策失误具有重要意义，同时也对其他监控界面中多目标视觉告警形式的设计具有一定的指导价值。

In order to explore the optimal visual warning coding form when multiple targets alarm at the same time on the mine gas monitoring interface, the paper adopted three visual coding forms of color, size and character to conducted single target and double target visual search experiments for three alarm levels of attention, warning and danger based on the mine gas monitoring system. Through the analysis of the accuracy, response time and subjective score, the results show that whether it is a single-target or dual-target visual search experiment, the search performance is optimal when the interface adopts the color-coded visual warning form. Compared with character encoding, the search time is shorter with size encoding, but the accuracy is lower. The experimental results also find that in the dual-target visual search experiment, the similarities of alarm levels have significant effect on response time. The response time of two targets with the same alarm level is shorter than that of two targets with different alarm level, and the second target is easier to be found during the search process. The results of this study are of great significance to improve the security of the mine gas monitoring interface and reduce the cognitive decision-making errors of monitoring personnel, and also have certain guiding value for the design of multiple-target visual warning forms in other monitoring interfaces.