Workers in hot underground coal mines could develop heat-related illnesses, (especially skin, digestion and kidney problems), as compared to workers in non-hot mines. This study found severity of this situation by comparing heat illness symptoms, core body and skin temperature and kidney malfunctioning amongst workers of both types of mines. Ingestible thermometric pills (sending readings to Sensor Electronic Module every 15 s), skin temperature probes (connected to various body parts and sending readings to loggers) and laboratory analysis of pre- and post-shift samples of blood and urine, US-NIOSH-HETA-2012 sheet to survey symptoms, were used to collect data from 50 workers (25 from five hot mines (G1) and 25 from five non-hot mines (G2)). Two mine groups showed significant differences ( p-value <.001) regarding wet-bulb globe temperature, dry-bulb temperature and relative humidity. The highest core body temperature was 38.8°C in G1 and 37.9°C in G2. In intra-group comparison for kidney functioning, post-shift samples showed haematocrit (%) was reduced to 43.6 ± 2.1 from 45.4 ± 1.4 in G1 and to 44.0 ± 2.9 from 45.0 ± 0.75 in G2, and estimated glomerular filtration rate was reduced from 100 ± 19 to 94 ± 0 mL/min/1.72 m2 in G1 and to 113 ± 15 from 115 ± 19a in G2 workers. The comparison showed hot mines could induce heat-related illnesses which would necessitate intervention to reduce exposure.

中文翻译：

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地下矿井采煤工人工作场所诱发的热相关疾病和肾脏疾病

与非高温矿井的工人相比，高温地下煤矿的工人可能会患上与热有关的疾病（特别是皮肤、消化和肾脏问题）。这项研究通过比较两种矿山工人的热病症状、核心身体和皮肤温度以及肾脏功能障碍，发现了这种情况的严重性。可摄入的测温药丸（每 15 秒将读数发送到传感器电子模块）、皮肤温度探头（连接到各个身体部位并将读数发送到记录仪）以及班前和班后血液和尿液样本的实验室分析，US-NIOSH- HETA-2012 表用于调查症状，用于收集 50 名工人的数据（25 名来自五个热矿 (G1)，25 名来自五个非热矿 (G2)）。两个矿组在湿球温度、干球温度和相对湿度方面表现出显着差异（p 值 <.001）。G1 的最高核心体温为 38.8°C，G2 为 37.9°C。在肾功能的组内比较中，轮班后样本显示血细胞比容 (%) 从 G1 的 45.4 ± 1.4 降至 43.6 ± 2.1，从 G2 的 45.0 ± 0.75 降至 44.0 ± 2.9，估计肾小球滤过率从100 ± 19 至 94 ± 0 毫升/分钟/1.72 m2在 G1 中从 115 ± 19 到 113 ± 15A在G2工人中。比较显示，热矿井可能会引发与热有关的疾病，因此需要采取干预措施来减少接触。