岩（矿）石密度是铀矿勘探和储量计算中必须提交的重要参数之一。目前生产中主要采用石腊法、宽束γ-射线吸收法测定其密度。其中吸收法较石腊法具有代表性强、效率高的特点，已为大量实践证明是行之有效的。但是该方法要求的技术条件不易控制，工作量大，计算复杂，使方法的应用受到一定影响。 Rock (ore) rock density is one of the important parameters that must be submitted for uranium exploration and reserve calculation. The current production of the main use of paraffin method, wide beam γ-ray absorption method to determine the density. Among them, the absorption method is more representative and more efficient than the paraffin method and has been proved to be effective for a large number of practices. However, the technical requirements of the method are not easy to control, the workload is heavy and the calculation is complicated, so that the application of the method is affected to a certain extent.