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我矿磷矿石多伴生有少量天然放射性物质。在地下开采中,其小剂量长期照射对人体的影响如何?其说不一。为利于开采工作的正常进行,利于给放射性损伤早期诊断提供依据,近两年多来,我们重点对井下工人,进行了病史、症状、查体及血象等对比分析观察。根据初步结果可以认为,长期接触小剂最放射性物质对人体未有造成不良影响。 (一)基本情况 我矿开采浅海相沉积的磷块岩矿床。含磷层天然伽玛强度要比围岩高,最高达15倍之多。据测定,磷块岩中放射性元素铀含量为0.002～0.012％,天然伽玛强度一般变化在26～128γ之间,最高154γ;在与磷块岩呈互层产出的磷硫铝锶矿中,放射性元素铀含量为0.018～0.035％,天然伽玛强度一般为22～179γ,最高达200γ。
Mine mine phosphate rock associated with a small amount of natural radioactive substances. In the underground mining, the long-term exposure to small doses of its impact on the human body? In order to facilitate the normal mining work, which will help provide a basis for early diagnosis of radioactive injury, the past two years, we focused on downhole workers, history, symptoms, physical examination and blood and other comparative analysis of observation. According to the preliminary results, it can be considered that the long-term exposure to small doses of the most radioactive material has no adverse effect on the human body. (A) of the basic situation I mine shallow marine sedimentary phosphate rock deposits. Phosphorus natural Gamma intensity than the high rock, up to 15 times as much. It has been determined that the radioactive elemental uranium content of phosphorite blocks is 0.002-0.012%, the natural gamma intensity generally varies between 26 and 128γ, and the highest is 154γ. Among the phosphosilicates and strontium aluminosilicates that are interbedded with phosphatic blocks , Radioactive elements uranium content of 0.018 ~ 0.035%, natural gamma intensity is generally 22 ~ 179γ, up to 200γ.