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Background: Firefighters are at high risk for developing posttraumatic stress disorder (PTSD), with attention bias being a contributing factor. Attention Control Training (ACT) is a cognitive behavioral intervention for PTSD treatment and prevention, but its effectiveness for firefighters is unverified. Methods: A randomized controlled trial involving the Kunming Training Brigade of the Fire Rescue Bureau assessed the impact of four weeks of ACT exercises on PTSD symptoms, attention bias, and attention-bias variability. Results: 180 individuals were randomized into two groups. Within groups, there was a significant decrease in PTSD symptoms from pre- to post-intervention for both the intervention and control groups. Additionally, a comparison of post-intervention PTSD symptoms between the intervention and control groups showed a statistically significant difference, with the intervention group showing lower levels of PTSD symptoms than the control group (U = 4688, p = 0.048, r = -0.148). The post-intervention analysis also revealed a statistically significant difference in ABV between the intervention and control groups, with the intervention group showing a greater reduction in ABV than the control group (U = 4766, p = 0.041, r = -0.153). Conclusions: The present study provides evidence that ACT can be an effective intervention for preventing PTSD among firefighters. The study highlights the importance of addressing mental health concerns among firefighters and contributes to the development of effective interventions for the prevention of PTSD among high-risk populations. Further research is needed to determine the long-term effectiveness of the intervention and to examine its generalizability to other populations.

With the continuous development of China’s industry, the disorderly discharge and accumulation of coal gangue in mining areas have become a key ecological problem, which not only occupies a large amount of land, but also causes various pollution phenomena. Therefore, the comprehensive utilization of coal gangue has become a research hotspot in the field of environmental governance. In this paper, by mixing coal gangue and fly ash with straw in different ratios to prepare compound soil substrate and growing lettuce, the effects of different ratios of the three wastes and coal gangue particle sizes on crop growth were analyzed by measuring cotyledon area, plant height and other indexes. The experimental results showed that the best proportion of soil matrix improvement was 42.9% coal gangue, 7.1% fly ash, 10% straw and 40% soil, where the coal gangue particle size proportion was 20% fine particles, 20% medium particles and 60% coarse particles. This experiment mixed coal gangue with typical solid wastes, which will, to a certain extent, solve the problem of solid waste dumping and resource scarcity in China and provide a scientific reference for the comprehensive utilization of the three wastes and the repair of soil in mining areas.