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附录Ⅳ 在高品位露天矿开采中装载机 司机室屏蔽的最优化 以轮班的方式由4个司机轮流操作一台矿石装载机.他们每个人受到的γ辐射剂量大约为:40mSv·a~(-1)。为了降低司机受到的辐射剂量,需要考虑司机室的屏蔽问题。预计露天矿的寿命是7年,在没有屏蔽的情况下,总共受到的剂量是4×40×7=1120人·mSv: 方案A:考虑用58mm厚的钢板进行屏蔽.估计每个司机将受到4mSv·a~(-1)的剂量。安装屏蔽板的代价是US
APPENDIX IV OPTIMIZATION OF SHIELDING OF DRIVER ROOMS IN HIGH-LEVEL OPEN PACE MINING A four-driver operation of an ore loader is carried out on a shift basis and each of them receives a gamma radiation dose of approximately 40 mSv · a ~ 1). In order to reduce the radiation dose received by the driver, the cab shielding problem needs to be considered. The life expectancy of the opencast mine is expected to be seven years, with a total exposure of 4 × 40 × 7 = 1120 persons · mSv without shielding: Plan A: Consider shielding with 58 mm thick steel plates Estimated that each driver will be affected 4mSv · a ~ (-1) dose. The cost of installing a shield is US