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    平顶山矿区深部矿井高温热害多场景协同防控技术及工程应用

    Multi-scenario collaborative heat-hazards prevention and control technology and its engineering application in deep mines of the Pingdingshan Mining Area

    • 摘要: 针对平顶山矿区深部矿井高温高湿、作业点分散和防爆约束强等热害问题,提出了面向固定岗位、移动作业和零星作业点的多场景协同制冷降温方法。构建了快速制冷、分散储冷和个体配冷三级联动协同防控体系,研制了矿用防爆冰柜、气动式储冷风箱、自主式冷风呼吸器和矿用降温马甲,并在平顶山天安煤业股份有限公司所属10家单位的21处典型高温作业点开展了工业性试验。试验场景覆盖采煤工作面、掘进工作面、盾构作业线和局部检修点,现场温度为32~38 ℃,相对湿度为70%~100%。结果表明,矿用防爆冰柜10.0 h连续运行过程中制冷温度保持在−23.39~−21.05 ℃;气动式储冷风箱出风温度为22.9~30.5 ℃,平均降温幅度约为8.0 ℃;自主式冷风呼吸器运行60 min时吸气温度为25.4~26.0 ℃;矿用降温马甲连续穿戴2 h未出现明显移位,体表核心温度维持在31.8~33.2 ℃。装备累计运行超过8 000 h,试验期间未发生安全故障或明显性能衰减。系统应用后,典型高温作业点单班连续作业时间延长2.0 h,人员轮换频次降低50%,劳动生产率提升5%~10%,高温相关设备故障频次下降40%。该体系可实现冷量由集中制备向局部补冷、呼吸区降温和体表热防护的分级传递,为深部矿井多场景高温热害防控提供工程参考。

       

      Abstract: A multi-scenario collaborative refrigeration and cooling method was developed for fixed workstations, mobile operations, and scattered work sites in deep mines of the Pingdingshan Mining Area, where high temperature and humidity, dispersed workplaces, and stringent explosion-proof constraints pose significant heat-hazard challenges. A three-level collaborative prevention and control system integrating rapid refrigeration, distributed cold storage, and personal cooling was established. A mine explosion-proof freezer, a pneumatic cold-storage air-supply box, a self-contained cool-air respirator, and a mine cooling vest were developed, and field industrial tests were conducted at 21 representative high-temperature work sites across 10 units affiliated with Pingdingshan Tianan Coal Mining Co., Ltd. The test scenarios covered coal mining faces, heading faces, shield-tunnelling lines, and local maintenance sites, with ambient temperatures of 32–38 ℃ and relative humidity of 70%–100%. The results show that the refrigeration temperature of the mine explosion-proof freezer remained between −23.39 and −21.05 ℃ during 10.0 h of continuous operation; the outlet air temperature of the pneumatic cold-storage air-supply box ranged from 22.9 to 30.5 ℃, with an average temperature reduction of approximately 8.0 ℃; the inhaled-air temperature of the self-contained cool-air respirator was 25.4–26.0 ℃ after 60 min of operation; and the mine cooling vest showed no obvious displacement during 2 h of continuous wear, while the core body-surface temperature remained at 31.8–33.2 ℃. The equipment accumulated more than 8 000 h of operation, with no safety failures or obvious performance degradation during the test period. After system implementation, the continuous working time per shift at representative high-temperature work sites increased by 2.0 h, personnel rotation frequency decreased by 50%, labor productivity increased by 5%–10%, and the frequency of heat-related equipment failures decreased by 40%. The proposed system enables hierarchical transfer of cooling capacity from centralized preparation to local cooling, breathing-zone cooling, and body-surface thermal protection, providing an engineering reference for multi-scenario heat-hazard prevention and control in deep mines.

       

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