大孔隙与大孔隙率矿石的石蜡法体重测定中的修正问题

THE CALIBRATION PROBLEM OF DETERMINING GRAVITY OF THE LARGER PORE AND POROSITY FACTOR BY SEALING-PARAFFIN METHOD

以伽玛测井解释含量确定铀矿储量时，矿石体重应该是天然状态下的体重，当矿心孔隙度较大而有部分失水，并存在表面大孔隙时，封蜡法所测得的体重系统偏小。对此，本文改进了测定方法，提出了修正方案，并以某矿床为例分析了产生表面孔隙的原因及修正后的具体结果。

When the uranium reserves is determined by interpreting uranium content using gammalogging, the ore gravity should be in the natural condition. If the ore-core has large porosityand is dewatered partially,large pore exists on the surface of the ore-core, the gravities determined by sealing-paraffin method are systematically lower. Thus,this paper has proposed acalibration method to improve the measurement and taking a deposit as an example,the reasons for the surface pore and the calibrated results are analysed.