Study On Sandstone-type Uranium Deposit Of Uranium-radium And Radium-radon Equilibrium Coefficient

In uranium exploration,for sandstone type uranium deposit,especially for the rate of core seam section is not high,radioactive gamma logging results is the main information and basis.grade and thickness of important technical means for accurate calculation of uranium resources.gamma logging method is determine the spatial location of uranium ore body,,need to parameter correction of gamma logging data,including uranium-radium equilibrium coefficient correction,radium-radon equilibrium coefficient correction,ore humidity correction,thorium potassium modification etc.Because of ground leachable sandstone type uranium mine has high porosity and water saturation,therefore the types of uranium deposits are characterized by uraniumradium and radium-radon imbalance.So,must find for gamma logging under the specific conditions of uranium-radium and the radium-radon equilibrium coefficient,to using the results of the gamma measurement of uranium and accurately determine the boundary of ore-bearing bed and the real content.Therefore,when the ore uranium-radium and the radium-radon balance is destroyed,the calculation of the uranium content must be revised correspondingly.In this paper,the sandstone type uranium deposit sample analysis method uranium-radium equilibrium coefficient of two kinds of chemical analysis calculation methods: weighted to uranium lines or radium lines,reserves calculation method were analyzed,and the engineering for radium-radon equilibrium coefficient of two methods:geophysical prospecting method for measuring the parameters of hole ore core analysis and gamma logging interpretation results and calculation method to determine the influence factors analysis,and compares the research content and conclusions:(1)Towards to weighted uranium line and radium line,this two kinds of method for calculating reserves of weighted theory analysis and accuracy,and found that the uranium-radium equilibrium coefficient of radium line weighted is bigger than the uranium-radium equilibrium coefficient of uranium line weighted.(2)Using the weighted radium line uranium-radium equilibrium coefficient to modify gamma logging data results compared with the actual data,the more close to the actual result,smaller error,in order to avoid exaggerating the thickness of the mineralization,man-made cause uranium resource artificially high,cautious approach is use radium weighted uranium-radium equilibrium coefficient for radioactive logging data correction.(3)The cost of geophysical parameters measurement is higher,the construction period and the observation period are long,but less affected by objective factors,the method is scientific,reasonable,the calculation results are accurate and reliable;The cost of mine cole analysis calculation method is low,but has a large amount of data,the results have many influencing factors.The two methods in ground leachable sandstone type uranium mine radium-radon equilibrium coefficient calculation are both important,not a single one can be omitted,there is a mutual verification between the two methods.