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Ｘ辐射取样是一种原位快速测定矿石品位的新技术。基体效应、不平度效应和矿化不均匀效应是该技术的三个技术关键。本文提出了以目标元素的特散比为基本参数建立求解矿石目标元素品位的数理方程和判别主要干扰元素的判据，提出了克服矿化不均匀效应的最佳测网。通过对铜、铅、锌、铁、钼和锡等不同矿种的实验和应用表明：Ｘ辐射取样确定矿石品位与常规的刻槽（拣块）取样方法具有同等的准确度和精确度，可现场准确地划分矿体边界
X-ray sampling is a new technique for rapid in-situ determination of ore grade. The matrix effect, the unevenness effect and the mineralization uneven effect are the three technical keys of the technology. In this paper, a mathematical equation to solve the grade of the ore target element and a criterion to judge the main disturbing element are established by taking the specific ratio of the target element as the basic parameter, and the best measuring network to overcome the uneven mineralization effect is proposed. Experiments and applications of different minerals such as copper, lead, zinc, iron, molybdenum and tin show that X-ray sampling has the same accuracy and accuracy as the conventional notching method Accurately divide the ore body boundary on site